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SHARAFAT HOUSING PROJECT

CIVIL WORKS

TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

SECTION TITLE

SECTION A GENERAL

SECTION B EXCAVATIONS, EARTHWORKS & ASPHALT

SECTION C CONCRETE WORKS

SECTION D STONE WORKS

SECTION E METAL WORKS

SECTION F SANITARY WORKS

SECTION G ELECTRICAL WORKS

SECTION H FIRE FIGHTING WORKS

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SECTION A: GENERAL

A 1 SCOPE OF WORK

UNDP/PAPP has been entrusted by the Government of Italy a Grant of US$ 1.5 million for

the implementation of social housing projects. It is envisaged that the Grant will contribute to

improve the physical and social infrastructure services in the selected areas of the Jerusalem

area.

The Latin Patriarchate of Jerusalem has been selected for this project as one of the impact

areas and the activities will consist of Landscaping, Construction and Finishing Works within

the already running project „Sharafat Social Housing‟ in Beit Safafa.

The entire project is comprised of construction of 80 residential units served with the

infrastructure like; roads, sewerage, water network and electricity network.

A 2 DRAWINGS

A list of Contract Drawing available at the date of tender is included on the front page of the

Drawing Book and at the end of these Specifications

A 3 CONTRACTOR'S PRICE

The Contractor's price shall include for all materials labour and plant requirements necessary

for the completion of the Contract in accordance with the Contract Drawing and

specifications with exception only of items supplied by e Employer.

A 4 USE AND PROTECTION OF SITE

The Contractor shall take such measures and exercise such are to protect the Site as shown on

the Site Plan during the course of the Works as directed by and to the entire satisfaction of the

Engineer. All temporary buildings and work areas such as Site Offices, Workshops Store

Buildings and Yards, Living Accommodation, Messrooms, etc. shall be constructed in

position approved by the Engineer.

The contractor shall confine his apparatus, the storage of materials and the operations of his

workmen to limits indicated by law, ordinances, permits or directions of the Engineer. The

Contractor shall erect suitable temporary fences as required by the Engineer.

The Contractor shall not load or permit any part of the structures to be loaded with a weight

that will endanger its safety.

On commencement of the Contract, the Contractor shall clear the Site and adjacent area of all

rubbish and debris to the satisfaction of the Engineer. Upon completion of the Contract, the

Site and any adjacent areas affected by the building operation shall be properly cleared of all

temporary works, debris another rubbish and all disturbed works and ground made good to

the entire satisfaction of the Engineer.

A 5 MATERIALS FOUND ON SITE

Any sand, gravel or other building material found on the Site shall not be used in the

execution of the Works without the prior written consent of the Engineer which shall not be

unreasonably withheld.

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A 6 TEMPORARY STORMWATER DRAINAGE

The Contractor shall ensure that the whole of the Site, is kept free from the risk of stormwater

flooding and shall provide such temporary ditches, gullies an? the like as may be necessary

and shall at completion of the Works backfill such excavation and make good all works

disturbed.

A 7 SHOP DRAWINGS

If at any time before the commencement or during the progress of the work it appears to the

Contractor that for the proper execution of specific part of the works, shop drawings are

necessary, these drawings shall be prepared by the Contractor and submitted to the Engineer

for approval. On the other hand, the Engineer shall have authority to order at any time and the

Contractor agrees to provide any number of shop drawings which in the opinion of the

Engineer are necessary for the proper execution of a specified work, the Contractor shall not

proceed with the above mentioned work unless these shop drawings are approved by the

Engineer.

Shop drawings shall be fully detailed and drawn to proper scale. Unless otherwise

specifically required in the drawings or Specifications, shop drawings shall be supplied in

four copies with dark lines on a white background.

Shop drawings shall be approved or returned to the Contractor for alternation or amendment

within four (4) weeks of their receipt by the Engineer. Shop Drawings returned for alternation

or amendment shall be resubmitted for approval. Altered or amended shop drawings shall

show the nature of the alternation or amendment in a revision block on the drawings with a

revision number or letter and the date of the revision.

A 8 " AS BUILT " DRAWINGS

All prints of the Drawings, where required, shall be corrected by the Contractor and

submitted to the Engineer for approval as the works proceed. Upon the completion of the

Works, the Contractor shall prepare a completely new set of drawings for the project as

executed and submit same in duplicate to the Engineer for approval.

When approved by the Engineer, the Contractor shall submit one transparency and six copies

of all drawings duly marked "As-Built". The final payment shall not be made except for the

actual works that have been completed in accordance with the Specifications and have been

duly presented on the "As- Built Drawings".

The Contractor shall not be entitled to any extra payment or extension of time for the

correction, preparation and supplying of the above mentioned drawings and transparencies.

A 9 SCAFFOLDING

The Contractor shall provide, erect, maintain, and dismantle any clear away at completion

proper and adequate scaffolding including that required for Sub-Contractors and Specialists.

Putlong holes shall be made good to match the adjacent surface as the scaffolding is

dismantle. The Contractor shall be entirely responsible for all safety precautions in

connection with the scaffolding and for its entire sufficiency for the work.

A 10 PROTECTION

In the pursuance of his obligations under the Conditions of Contract, the Contractor shall

wherever required or directed by the Engineer cover up and protect the Works form the

weather and from damage by him or other workmen performing subsequent operations. He

shall provide all necessary dust sheets, barriers and guard rails and clear away same? at

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completion. The Contractor shall take all reasonable and proper steps for the protection of all

places on or about the Works, which may be dangerous to his workmen or any other persons

or to traffic. The Contractor shall provide and maintain warning signs, red warning lamps and

barricades as necessary in all such places.

A 11 SEPARATE CONTRACTS

The Employer reserves the right to let other separate contracts in connection with the work

under similar conditions. The Contractor shall afford other contractors reasonable opportunity

for the introduction and storage of their materials and the execution of their work, and shall

properly connect and co-ordinate his work with theirs. If any part of the Contractor's work

depends for proper execution or results upon the work of any other contractor, the Contractor

shall inspect and promptly report to the Engineer and defects in such work shall render it

unsuitable for such proper execution and results. His failure so to inspect and report shall

constitute an acceptance of the other Contractor's Works as fit and proper for the reception of

this work, except as to defects which may develop in the other Contractor's work after the

execution of his work. To ensure the proper execution of his subsequent work, the Contractor

shall measure work already in place and shall at once report to the Engineer any discrepancy

between executed work and the Drawings.

A 12 DEFINITIONS

"Approved "directed "selected” means the approval, direction or selection by the Engineer.

"Instructions means the instructions in writing of the Engineer or Engineer's Representative

unless specified otherwise. ”Manufacturer's Recommendation” means the Manufacturer's

recommendations or instructions, printed or in writing and current at the date of tender.

“Or approved equal” means that materials of different manufacturer may be substituted if

proper approval has been obtained. The rates or prices will be held to be based on the

materials specified. Where an item is denoted as N.I.C. on the Drawings it shall mean that

item indicated is not included in the Contract.

Where the terms Architect or Engineer is used in this Contract they shall have the same

meaning. Where the terms Architect's Representative or Engineer's Representative are used

they shall have the same meaning.

A 13 STANDARDS

In the Contract reference is made to the Standards, Codes of practice and Specifications

issued by the following organizations, hereinafter referred to by the following abbreviations:

AASHO Means the American Association of State Highway Officials.

ACI Means the American Concrete Institute.

AFNOR Means the Association Francaise de Normalisation.

AISC Means the American Institute of Steel Structure.

ASA Means the American Standards Association.

ASHRAE Means the American Society of Heating, Refrigerating and Air-Conditioning

Engineers

ASTM Means the American Society for Testing and materials.

AWWA Means the American Water Works Association.

B S Means the British Standards Institution.

CMA Means the Cable Manufacturers Association.

DIN Means the Deutscher Normanusschuss.

NEM Means the National Electrical Manufactures Association.

NFPA Means the National Fire Protection Association.

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VDE Means the Verban Deutscher Electrotechniker.

EU&CE Euronormes.

These references shall in every case be deemed to include the latest edition or issue of such

standards.

The Contractor upon receiving instructions shall supply the Engineer‟s Representative with

single copies of all standards referred to on the Drawings or Specification and shall arrange

for further copies for his own use.

A 14 MATERIALS GENERALLY

All materials and manufactured goods are to be the best of their respective kinds and as

described in the Specifications and the Contractor shall submit for the approval of the

Engineer a list of names and addresses of the manufacturers, the trademarks and types of all

materials and articles he proposes to employ together with all specifications and descriptions

that may be required in this connection before any orders are placed. Samples are to be

provided if requested by the Engineer. Where a particular proprietary product, supplier's

catalogue is referred to in the Specifications or shown on the drawings the material specified

may be obtained from another source provided it is similar, equal and approved by the

Engineer.

If during the course of the Contract certain materials required for use in the Works should be

unobtainable despite the best efforts of the Contractor, then the Contractor may offer for the

approval of the Engineer substitute materials. The use of these substitute materials shall be at

the sole discretion of the Engineer. In the event of the acceptance of the substitute materials a

suitable price reduction shall be made in the respect of decrease in quality or value but no

price addition shall be made in respect of increase in quality or value. In the event of refusal

of the substitute materials the Contractor shall not be relieved of any of his obligations under

the Contract and shall be solely liable for any delay or loss occasioned by his failure to

provide materials as specified.

Where manufacturers recommendations have been entered into the contract documents, it is

for the purpose of giving an indications to the contractor of the Engineer‟s intentions on the

application and use of the material. It is deemed that the successful Contractor will make

direct contact with the manufacturer m to ensure that he is carrying out the works in

accordance with their recommendations.

A 15 CONTRACTOR TO VERIFY SITE MEASUREMENTS

The Contractor shall check and verify all site measurements wherever requested by other

specialist contractors or by nominated or other subcontractors to enable them to prepare their

own shop drawings, and pass on the information with sufficient promptness as will not in any

way delay the Works. A copy of all such information passed or shall be given to the

Engineer.

A 16 SAMPLES

The Contractor shall furnish for approval, with reasonable promptness all samples of

materials and workmanship required by the Engineer. The Engineer shall check and approve

such samples with reasonable promptness for conformance with the design concept of the

works and for compliance with the information given in the Contract Documents. The Work

shall be in accordance with approved samples.

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a) All material samples shall be delivered to the Engineer‟s office with all charges in

connection with therewith paid by the Contractor.

b) Duplicate final approval samples, in addition to any required for the Contractor‟s use shall

be furnished to the Engineer.

c) Samples shall be furnished so as to delay fabrication allowing the Engineer reasonable

time for consideration of the sample submitted.

d) Each sample shall be properly labelled with the name and quality of the material,

manufacturer‟s name, name of project, the Contractor‟s name and the date of submission and

the Specification number to which the sample refers.

A 17 CUTTING AND PATCHING

The Contractor shall be responsible for all cutting, patching and making good in all trades for

all work and his prices will be deemed to include for all such cutting and patching and

making good.

A 18 SITE OFFICES, LATRINES, ETC.

The Contractor shall provide and maintain on the Site for the duration of the Contract the

following:

a) A temporary office for the accommodation of his Agent/Engineer and Staff, including all

necessary sanitary facilities, such offices shall be open at all reasonable hours to receive

instructions, notices or other communications. Electrical and Telephone installations with an

external line for internet, E-mail and fax shall be provided.

b) A suitable and adequate temporary office shall be provided and furnished by the

Contractor for the sole use of the Engineer and his staff. Such office shall be to the approval

of the Engineer.

c) Adequate fire fighting equipment to the approval of the Local Fire Authority and the

Engineer.

d) An approved sign board, written in Arabic and English. The size of signboard and lettering

including to wordings shall be as directed by the Engineer.

A 19 ATTENDANCE ON THE ENGINEER

The Contractor shall for the duration of the Contract supply sufficient attendance for the

Engineer‟s supervisory staff and shall maintain and pay all water, electricity, and telephone

charges shall keep the Site Office and supervision cabins in a clean and sound condition at all

times. The Contractor shall be responsible for the security of the Site Office and its contents

at all times and shall employ watchman for this purpose.

A 20 TESTING

The Contractor shall allow in his rates and prices for the cost of carrying our tests necessary

for compliance with the Specification in independent laboratories outside the Site.

A 21 TEMPORARY BUILDINGS

The Contractor shall provide and maintain on the Site sheds, offices, messrooms, sanitary

accommodation and other temporary works of any kind whatsoever for the Contractor‟s

supervisory staff and work people and for Sub-Contractor‟s staff employed upon the works.

The Contractor‟s site office shall be open during working hours to receive instructions

notices or other communications. Sheds shall be suitable to store all materials equipment and

furniture which in the opinion of the Engineer needs protecting from the weather.

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The Contractor shall provide and maintain in approved positions on the Site Adequate

sanitary accommodation for his staff workmen and sub- Contractors. This sanitary

accommodation shall be kept in a clean and orderly condition to the approval of the Public

Health Authority and the Engineer to ensure that no nuisance is caused.

A 22 TEMPORARY WORKS AND REINSTATEMENT

The Contractor shall provide and maintain all temporary roads and tracks necessary for

movement of plant and materials, and clear same away at completion and make good all

works damaged or disturbed. The Contractor shall submit drawings and full particulars of all

Temporary Works to the Engineer before commencing same. The Engineer may require

modifications to be made if he considers them to be insufficient and the Contractor shall give

effect to such modifications but shall not be relieved of his responsibilities for the sufficiency

thereof.

The Contractor shall divert as required, at his coast and to the approval of the Engineer, all

public utilities encountered during the progress of the Works, except those specially indicated

on the drawings as being included in the Contract. Where diversions of services are not

required in connection with the permanent Works, the Contractor shall uphold, maintain and

keep the same in working order in existing locations. The Contractor shall make good, at his

own expense, all damage to telephone, telegraph and electric cable or wires, sewers, water, or

other pipes except where the Public Authority or Private Party Owing or responsible for the

same elects to make good the damage. The cost incurred in so doing shall be paid by the

Contractor to the Public Authority or Private Party in demand.

All injury to the surface of the land, to the beds if water courses, projecting banks, etc. where

disturbed by the Works (other than where specifically ordered by the Engineer) shall be

repaired by the Contractor or the authorities concerned, at the Contractor‟s expense. All such

making good shall be to the approval of the Engineer. All requirements detailed above shall

be provided and maintained at the expense of the Contractor. The Employer shall not be

liable for loss or injury to and Temporary Works.

A 23 WATER FOR THE WORKS

The Contractor shall make all necessary arrangements and provide all water for the proper

execution of the Works, together with all transport temporary plumbing, storage and

distribution, pay all charges and alter adapt and maintain temporary work as necessary

remove and make good at completion.

A 24 ELECTRICITY FOR THE WORKS

The Contractor shall make all necessary arrangements and provide all artificial lighting and

power for the proper execution and security if the Works and its protection.

With all meters temporary wiring and fittings, pay all charges and alter, adapt and maintain

the temporary works as necessary and remove and make good at completion

A 25 PROVISION OF PLANT AND TOOLS

The Contractor shall provide and install all necessary hoists, ladders, scaffolding. Staging,

tackles, tarpaulins, tools, vehicles, and other plant (mechanical and otherwise) and allow for

altering adapting and maintaining them in good condition as necessary and eventually

removing from site and making good.

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A 26 TEMPORARY BARRIERS, FENCING ETC...

The Contractor is to provide all temporary barriers, fencing, hoarding, guard rails, gates, and

the like as may be necessary to protect the public and others, for proper execution of the

Works and shall remove and clear away at completion of the Works and make good all work

disturbed.

A 27 INCONSISTENCY IN CONTRACT DOCUMENTS

The Contractor shall execute the Works according to the provisions of the Contract

Documents. Any work indicated in one of the documents but omitted and/or stated in one or

more of the other documents shall be treated as though it were included in all of them.

If any two documents of the Contract conflict as to the quality of the work to be carried out,

the discrepancy shall be brought to the notice of the Engineer, who shall instruct the

Contractor which of the two conflicting documents to regard as correct.

If the Contractor should discover that any work has been omitted and/or not indicated entirely

or partially from all the documents, but that such work is essential to the safety or proper

functioning of the works, he shall report the facts immediately to the Engineer. If the work is

something which in the opinion of the Engineer could not have been foreseen by an

experienced Contractor, the Engineer should issue to the Contractor a variation order

stipulating the details of the work to be done.

Save as aforesaid in the above paragraph, no additional payment shall be made in respect of

work carried out in connection with discrepancies between the various Contract Documents.

A 28 ERRORS IN COMPUTING CONTRACT DOCUMENTS

The Contractor shall be responsible for any error which he makes in computing any quantities

of material and labour required or costs involved or through any lack of knowledge of the

Site or misunderstanding of anything shown or implied on the Drawings or in the

Specifications and/or the Bills of Quantities.

The Contractor must refer any discrepancy in the Drawings or the Specifications to the

Engineer before proceeding in any of the Works otherwise the decision of the Engineer as to

the interpretation of the discrepancy will be final. Any item or items of work not specifically

shown on the Drawings or referred to in the Specifications but which would be necessary for

the proper construction of the works in accordance with the best practice is implied and must

be included for as incidential to the Contract Sum. Any item for which the Contractor has not

inserted a price in the Bills of Quantities shall be deemed to be covered by other prices or

rates therein.

A 29 SITE MEETINGS

During the course of the Works, site progress meetings shall be held at regular intervals at

least once every two weeks in the presence of the Engineer for the purpose of co-ordinating

the Contractor‟s work and to insure that full compliance with the various sequences of the

contract are maintained. Minutes of such Site meetings will be recorded, copies will be

distributed to all persons concerned and full effect shall be given to all instructions contained

therein Prior to such meetings the Contractor shall give to the Engineer‟s representative

details in writing of that portion of the Works he proposes to construct during the coming two

weeks with details of the plant and methods he proposes to employ. These proposals shall be

discussed at the meeting and no work based on such proposals shall proceed without the

approval of the Engineer‟s Representative

The Contractor shall have no claim against the Employer for costs incurred by him in

changing the method of working or in the provision and use of other additional plant.

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A 30 DAILY REPORTS

The Contractor shall deliver daily to the Engineer‟s Representative a report as to the number

of workpeople employed on the Works in each Trade and copies of delivery notes of all

materials and goods to the Site during the day.

A 31 ACCESS FOR THE ENGINEER

The Contractor shall provide at all times during the execution of the Works and the

Maintenance Period proper means of access with ladders, gangways etc., and the necessary

attendance to move and adapt same as directed for the inspection or measurement of the

Works by the Engineer or the Engineer‟s Representative.

A 32 SETTING OUT AND LEVELLING

Prior to commencement of any site work the Contractor shall arrange to record on an

approved grid existing site ground levels and agree with the Engineer‟s Representative the

accuracy thereof by preparing a record drawing signed by the Contractor‟s Agent and the

Engineer‟s Representative. The Contractor shall set out and level the Works and obtain the

approval of the Engineer‟s Representative before commencing construction.

A 33 PROGRAMME TO BE FURNISHED

The Contractor shall prepare a program for the Works, including the work of subcontractors

and other work concurrent with the Contract, using the critical path network method. The

Contractor shall submit three (3) copies of programme to the Engineer with his tender.

Submission of programme will not relieve the Contractor of his obligations to apply in

writing for instructions as required by the Conditions of Contract. Receipt of programmes by

the Engineer shall neither affect the Contract completion date no relieve the Contractor of his

responsibility to complete the Works by this date. The Contractor shall review the

programme once each month to take account of any circumstances which arise affecting the

progress of the Works, and shall produce a revised programme and submit copies to the

Engineer.

A 34 CANCELLATION DUE TO SLOW PROGRESS

If the Engineer shall be of the opinion that having regard to the state of the Works at any

time, the Contractor will be unable to complete any section of the Works by the time

specified or by such extension thereof as he may be entitled to under the Contract and the

Contractor has failed to carry out steps and to expedite the work in accordance with the

Conditions of Contract or, if the Engineer is of the opinion that such steps are inadequate, the

Engineer may, by written order omit the whole or any part of the uncompleted work included

in that section and the Employer shall be at liberty to execute such omitted work by his own

workman or by other Contractors.

If the cost of such omitted or uncompleted work shall exceed the sum which would have been

payable to the Contractor on the completion of the said work, then the Contractor shall, upon

demand, pay to the Employer the amount of such excess and it shall be deemed a debt due by

the Contractor to the Employer and shall be recoverable accordingly.

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A 35 DELAYS

The Contractor will be deemed to have allowed for all delay caused by difficulty in obtaining

labour and materials or by suspension of part or the whole of the Works due to adverse and

inclement weather conditions.

A 36 NON-PRODUCTIVE TIME

The Contractor shall allow for all costs incurred by non-productive time and all other

expenses in connection with overtime.

A 37 SAFETY, HEALTH AND WELFARE

The Contractor shall comply with enactments regulations and working rules relating to safety

health and welfare of workpeople.

A 38 CONTRACTOR'S SITE REPRESENTATIVE

The Contractor‟s Representative in charge of the Works shall be a duly graduated Engineer

having at least Three (3) years experience in the superintendence of similar works and shall

be required to have a proper command of the Arabic and English languages.

A 39 ATTENDANCE

The Contractor shall allow for and be responsible for the general attendance of one trade

upon another.

A 40 OFFICIAL VISITORS

The Contractor shall at all times when authorized by the Engineer give free undisputed access

and all facilities to any authorized employee of the Employer, any representative of the

French Consulet in Jerusalem or any person authorized by the U.N.D.P. wishing to view or

inspect any part of the\ Works or the materials to be incorporated therein.

A 41 CARE OF THE WORKS, ETC.

The Contractor shall keep all persons (including those employed by Sub-Contractors) under

control and within the boundaries of the Site.

He will be held responsible for the care of the existing premises and of the works generally

until their completion, including all work executed and materials, good and plant (including

those Sub- Contractors and Suppliers) deposited on the Site; together with all risks arising

from the weather, carelessness of work people, damage or loss by theft or any other cause;

and he shall make good at his own expense or such damage and lose.

A 42 WORK AT COMPLETION

The Contractor shall clean the Works thoroughly inside and out removing all splashes,

deposits, rubbish and surplus material.

The Contractor shall remove all temporary markings, coverings and protective rappings

unless otherwise instructed.

The Contractor shall touch up minor faults in painted surfaces carefully matching color and

brushing out edges. He shall repaint badly marked areas back to suitable breaks and

junctions.

The Contractor shall adjust, ease and lubricate all doors, windows, drawers hardware,

equipment, appliances controls and other moving parts as necessary to ensure easy and

efficient operations.

The Contractor shall leave the Works secure with all access locked. He shall account for all

keys and shall hand over to the Employer with

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SECTION B: EXCAVATIONS, EARTHWORKS & ASPHALT

Part 1 - General

1.1 Description

a. Work Included: Furnish all labor, materials and equipment necessary for and

incidental to the completion of excavating, grading, micropiles drilling, filling,

backfilling, and grading work shown on the drawings and specified herein, pertaining

to the execution of all the earthworks normally carried out for the erection of

buildings, underground piping, underground structures, retaining walls, trenches, etc.,

complete in every respect, including all related items necessary to complete the work

shown on the drawings, described in this specification and as directed by the

Engineer.

b. Related work: Drawings and general provisions of contract, including General and

Supplementary Conditions, Bills of Quantities and Specification sections, apply to

work of this section.

1.2 Quality Assurance

a. Use adequate numbers of skilled workmen who are thoroughly trained and

experienced in the necessary crafts and who are completely familiar with the specified

requirements and the methods needed for proper performance of the work of this

Section.

b. Use equipment adequate in size, capacity, and numbers to accomplish the work of this

Section in a timely manner.

c. Codes and Standards: Perform excavation work in compliance with applicable

specifications and Local Codes. Further to the requirements of the general conditions

regarding the compliance of all materials and products with the latest issue or

revisions of all standards, the following is a list of the standards that are applicable to

this specification.

1. ASTM-C-136 Sieve or screen analysis of fine and coarse aggregates.

2. ASTM-C-127 Specific gravity and absorption of coarse aggregates.

3. ASTM-D-854 Specific Gravity of Soils.

4. ASTM-C-142 Friable particles in aggregates.

5. ASTM-D-1556 Density of soil in place by the sand-cone method.

6. B.S.1377 Methods of tester soil for Civil Engineering purposes.

7. ASTM-D-2216 Laboratory determination of moisture content of soil.

8. ASTM-D-423 Liquid limit of soils.

9. ASTM-D-424 Plastic limit and plasticity Index of soils.

10. ASTM-D-427 Shrinkage factors of soils.

d. In addition to complying with requirements of governmental agencies having

jurisdiction, comply with the directions of the soil engineer.

e. Materials Testing:

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1. In general, the quality control of materials and workmanship shall be carried out as

specified in the "Special Conditions" section. An approved independent and

authorized materials testing office shall carry out all necessary testing and reporting.

2. Preliminary series of tests such as Density/Moisture/CBR, etc., shall be carried out in

an authorized laboratory. The results of completed tests that are in accordance with

the specification shall require the approval of the Engineer, prior to the contractor's

making use of the material or product tested.

3. Compacting Testing

a. Sampling:

1. After a layer has been correctly graded and made even it shall be sampled for testing

the quality of the workmanship. The Engineer will determine the points where

samples shall be taken. Sampling shall be performed regularly for the approval of

each layer. The above shall be carried out in accordance with the relevant

requirements of the Specification.

2. In every case where the quality of a layer does not meet the requirements, it shall be

corrected or demolished and executed anew, as laid down in the specification. After

these corrections have been completed, the layer shall be retested. The Contractor

shall keep a check on the performance of tests and any objections shall immediately

be brought to the attention for the Engineer. Objections lodged at a later time will not

be considered. Work shall not start on a new layer until the previous one has been

approved. For any work or layer, the Engineer will determine the area for testing and

approval shall be obtained before a new layer may be placed thereon.

3. The cost of all above testing shall be met by the contractor whether the test results are

satisfactory or not.

b. Rate of density

1. The rate of density is the percentage ratio between the field density (without

correction for material passing the 3/4" sieve) and the calculated density multiplied by

100, as follows:

D = ____100______

Pc + Pf

Gs rDf

The value of the compaction will be a percentage rounded off to a whole number.

Where,

D - Calculated density T/cu.m.

Pc - Percentage of aggregates larger than 3/4"

Pf - Percentage of aggregates smaller than 3/4"

Df - Maximum density obtainable according to ASTM-D-1557-70 (method

D0 T/cu.m.)

Gs - Bulk specific Gravity of aggregates larger than 3/4", according to

ASTM-C-127-59.

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r- Correction factor, given in the following table:

Table of Correction Factors:

Pc% R

20 of less 1.00

21-25 0.99

26-30 0.98

31-35 0.97

36-40 0.96

41-45 0.95

46-50 0.94

51-55 0.92

56-60 0.89

61-65 0.86

66-70 0.63

Table extracted from AASHTO-T-224-67

c. Compliance With Requirements:

1. All works shall be done in accordance with the design levels and dimensions without

exceeding vertical deviations, as follows:

2. Subgrade and ditches - minus 30mm.

3. Fill under slab - minus 20mm.

4. The deviations shall apply to each layer and shall not be cumulative. Any increase in

this of one or more structural layers (above the subgrade) necessary because of the

a/m deviations shall be at the Contractor's expenses.

5. Repairs shall be made in areas where the deviations exceed the permissible limit. At

bulges the surplus material shall be removed and the rolling executed again. At

depressions the deficient material shall be added after disking the underlying layer to

a depth of 20cm and the rolling shall be executed again.

1.3 Submittals

If excavation is over 3.0 meters in depth it shall be sheeted and shored, submit

working drawings and calculation for the design of the sheeting and shoring.

1.4 Job Conditions

a. Existing Utilities: If utilities are to remain in place, provide adequate means of

protection during earthwork operations.

b. Should unanticipated utilities be encountered during excavation, cease work and

consult the Engineer immediately.

Resume work only after agreement has been reached as required by the General

Conditions. Repair damaged utilities to the satisfaction of the Engineer.

c. Demolish and completely remove from site existing underground utilities indicated to

be removed.

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1.5 Site Clearing

a. The Contractor shall carry out site clearance which shall include clearing out the

whole site area of all kinds of vegetation, debris rubbish, etc., including the grubbing

out of roots, including loading and carting away to an approved dumping area prior to

any site preparation and/or setting out is begun.

1.6 Site Inspection And Investigation

a. The Contractor shall visit the site prior to submittal of his tender price and make all

investigation which he deems necessary to ascertain the nature of the existing ground

and the sub-soil to be excavated. Permit to drill boreholes will be granted to

Contractor.

b. The Contractor shall examine the contract drawings and other contract documents and

promptly notify the Engineer of any discrepancy, error or omission that he may

discover. Correction instructed in this respect will be compiled with all in accordance

to the provisions of the contract documents.

Part 2 - Products

2.1 Soil Materials

a. Sub-base material: AASHTO M 147, Grade B or equivalent Local standards.

b. Drainage Fill: Washed, uniformly graded mixture of crushed stone, or crushed or

uncrushed gravel, with 100% passing a 38mm sieve and not more than 5% passing a

sieve No. 200.

c. Backfill and Fill Materials Classified as A-1, A-2, or A-3, in accordance with

AASHTO M 145 or equivalent Local Standards. All materials shall be free of rock or

gravel larger than 50 mm in any dimension, debris, waste, organic material, and other

deleterious matter. Do not use material with particles larger than 25 mm within 600

mm of structures and in the bottom 200 mm of trenches. The following tests shall be

used to ensure the fill meets the above requirements:

ASTM-D 2487: Classification of soils for Engineering purposes.

ASTM-D 422 : Particle - size analysis of soils.

ASTM-D 423 : Liquid limits of soils.

ASTM-D 424 : Plastic limit and plasticity index of soil.

Part 3 - Execution

3.1 Workmanship

a. Levels:

1. The Contractor shall satisfy himself of the accuracy of the existing ground levels as

shown on the drawings before commencing work on the site and no claim will

subsequently be allowed because of his failure to do so. All excavations shall be made

15

to the depths, levels and dimensions shown on the working drawings submitted by the

Contractor and approved by the Engineer all as may be directed.

b. Excavation Generally:

This work shall comprise excavation to any depth, as shown on the drawings, in

unclassified ground including all hard and rock layers, temporary earthwork supports

and any work below the normal water table. It includes also the satisfactory removal

and the position of all materials excavated, regardless of their nature and consistency

and including grubbing up old roots, drain pipes, hardcore and all other obstruction

below ground level. No extras will be allowed either on account of the condition of

the materials at the time it is excavated, the manner in which it is excavated or any

other cause whatsoever.

2. Excavation shall be carefully planned to ensure the adjacent ground and works are

adequately supported at all times, and their safety shall be Contractor's responsibility.

3. Excavation may be by machine or by hand at the discretion of the Contractor. Under

no circumstances will a claim be entertained for the extra cost of one type of

excavation over the other. Rock shall be removed with compressed air hammers or

other special plant. Blasting will not be allowed without written permission from the

Engineer, who must be fully informed by the Contractor as to steps taken to safeguard

the surrounding property, and the Contractor must take all responsibility for any

damage or annoyance caused by reason of blasting. In case permission is not granted

to use explosives, no claims for any additional costs or delays whatsoever shall be

considered.

4. Where excavation works are carried out by power excavating equipment such as mini

power shovels and mini back-hoes, jack hammers, power drills, or any other

equipment which the trade Contractor may propose to use, sufficient depth shall be

left unexcavated to enable the exact depth required to be obtained by hand

excavation.

c. Engineer's Approval:

1. The setting out shall be approved before work is commenced and the Contractor is to

notify the Engineer when the excavations are ready to receive the concrete foundation

and these shall not be laid until Engineer has signified his approval in writing that a

proper foundation strata has been obtained.

2. Covering up of foundations is not to be carried out until the foundations have been

inspected and approved. The Contractor is to give the Engineer three days notice of

his intention to cover up any foundation.

d. Shoring and Bracing:

1. Provide materials for shoring and bracing such as sheet piling, up rights, stringers and

cross-braces in good serviceable condition. Provide permanent steel sheet piling

wherever subsequent removal of sheet piling might permit lateral movement of soil

under adjacent structures. Cut-off tops at 400 mm below final grade and leave

permanently in place.

e. Drainage:

16

1. The Contractor shall be responsible, and shall provide all necessary equipment, for

keeping all excavation and subsequent concreting operations dry.

f. Liability of Excavation:

1. Any excavation which have been excavated in good ground beyond the level and

sizes shown on the drawings or required by the Engineer are to be filled by the

Contractor with the same mix as specified for the foundations at the Contractor's own

expense. Any soft pockets which in the Engineer's opinion should be excavated shall

be filled with concrete of characteristic strength 20 N/mm2 and measured and valued

at contract rates.

2. No heavy plant or equipment shall be placed adjacent to excavations unless by written

agreement of the Engineer. No such agreement given or implied shall relieve the

Contractor of his contractual responsibility.

g. Trimming excavations:

1. The bottom and sides of excavations shall be sufficiently trim, clean, and dust free

prior to pouring any concrete.

2. Importance is attached to keeping dry and clean the excavated surfaces upon or

against which concrete or brickwork is to be deposited or built. Adequate precautions

are to be taken to prevent water from washing out cement or particles falling in, or in

any other way injuring the work.

h. Backfilling:

1. No backfilling is to be done until construction below ground has been approved,

underground utilities systems have been inspected, tested and approved, forms

removed and the excavation cleaned of debris and rubbish.

2. Where floor slabs are designed as ground bearing it is particularly important that the

backfilling beneath these should be uniformly and thoroughly compacted to 95%

Proctor, this stipulation applies to trenches for retaining walls and foundations.

3. Filling behind basement or retaining walls shall not be placed in position until 14 days

after they have been constructed unless otherwise approved, or until the suspended

floor abutting the wall at the top or at intermediate levels has been cast and set, and

shall be placed with very great care to insure that the water-proofing membrane is not

damaged.

4. All materials used for back filling shall, unless otherwise ordered, be selected hard,

dry, material from the excavations or imported thoroughly compacted in 20 cm layers

with a heavy roller or other approved mechanical plant. The Contractor shall submit

his proposals for compacting the fill for approval before commencing work.

5. If the excavated material is not approved for use as fill, then clean well graded

hardcore or other granular fill shall be provided by the Contractor. Details of all

imported filling materials shall be submitted for approval before starting work, no

material will be approved which does not comply with the specifications.

17

6. If directed the top surface shall be well brushed and blinded with fine material to

receive concrete.

i. Trench Excavation and Filling:

1. Trenches for underground utilities systems and drain lines shall be excavated to the

required alignments and depths. The bottoms of trenches shall be tamped to secure

the required slope and shall be tamped if necessary to provide a firm pipe bed.

Recesses shall be excavated to accommodate bells and joints so that pipe will be

uniformly supported for the entire length. Rock, where encountered, shall be

excavated to a depth 15 cm below the bottom of the pipe, and the over depth shall be

back filled with approved material. Bottoms of trenches to receive PVC pipes shall be

excavated for sewer and water pipes, and underground electrical and communication

services unless otherwise indicated. Care shall be exercised to minimize disturbance

to the compacted subgrade.

2. The Contractor is to provide all timbering, steel sheets piling or other approved

supports, and support the sides of excavations, trenches and pits in such a way as well

be sufficient to secure them from falling and to prevent any movement.

3. The Contractor shall submit for approval details of his scheme and methods of

excavation shoring and filling before starting work. Such approval shall in no way

relieve the Contractor of his responsibilities for the sufficiency of his methods. The

Contractor is to be responsible for timing and removal of timber, steel sheet piling or

other materials ensuring and trenches.

4. Care must be taken in excavating service trenches etc., along side foundations.

Particular attention shall be given to all excavations and fillings which extend to

depths sufficient to fall within a dispersion angle o 45 from the underside of any

foundations.

5. Lower portion of trenches shall be backfilled in 15 cm maximum thickness layers and

compacted with suitable tampers to the density of the adjacent ground until there is a

cover of not less than 80 cm over drain pipe and 30 cm over other utilities unless

otherwise noted. The backfill in this portion of the trench shall consists of a selected

material at moisture content that will facilitate compaction, free from stones larger

than 2.5 cm in any dimension and hard clods and conglomerates larger than 15 cm in

any dimension.

j. Crushed Stone Filling:

1. The stone for filling is to be clean, dry, hard stone broken to pass 5 cm mesh, free

from all foul materials, vegetable matter and rubbish and is to be deposited in layers

no exceeding 15 cm thickness each layer well rammed and consolidated.

2. The surface of crushed stone filling or beds are to be leveled or other graded and

blinded with approved fine material to fill all interestics.

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3. Should any crushed stone filling or beds be damaged by water, mud or other cause

before being covered they are to be cleaned of and reformed as directed at the

Contractor's own expense.

k. Settlement:

The Contractor shall be responsible for making good any settlement of filing that may

occur and for any consequential damage up to the end of the period of maintenance.

The slopes, backfilled areas, etc., shall be formed to such levels as to ensure that the

final lines and levels after settlement shall be as shown on the drawings or directed.

l. Disposal of Surplus Material:

Load and cart away from the site all surplus excavated materials and deposit on tip to

be provided by the Contractor and pay all charges in connection therewith.

Base Coarse

Part 1 - General

1.1 Description

This work shall consist of performing all operations in connection with the complete

construction of crushed limestone base course to the thickness, lines and grades

shown on the plans and cross-section.

1.2 Materials

Aggregate material for base shall consist of hard, durable, crushed aggregated

retained on sieve No. 4 shall have 80% by weight of at least two fractured faces, be

mechanically crushed by approved crushing plant and shall be free from organic

matter or other deleterious substances and free from clay balls. Base course aggregate

shall conform to the following gradation:

AASHTO Sieve Percent Passing

3” -

2” (50.800mm) -

1.5” (38.100mm) 100

1” (25.400mm) 75-100

¾” (19.100mm) 60-90

½” (12.700mm) 45-80

3/8” (9.520mm) 40-70

No.4 (4.760mm) 30-65

No.20 (2.000mm) 20-40

No.40 (0.420mm) 8-20

No.200 (0.075mm) 5-10

The fractions passing the No.200 sieve shall not be greater than 70% of the fractions

passing No. 40 seive.

The aggregate shall conform to the following tests requirements:

19

California Bearing Ratio (ASTMD 1883) 80% Min. at

(4 days soaking 100% M.D.D. AASHTO T-180)

Los Angeles Abrasion (AASHTO T-96) 40 maximum

Sand Equivalent (AASHTO-T-176) 30 minimum

Liquid Limit (AASHTO T-98) 25 maximum

Plasticity Index (AASHTO T-90) 2 mim.-6 max.

Flaky and elongated particles (B.S.S. 812) 25% max. each

The following tests shall also be performed:

A. To determine the presence of soft materials in the base materials, an abrasion test at

two different revolution shall be performed; namely at 100 revolutions and at 500

revolutions. Then the ratio of passing sieve No. 12 will be calculated as follows:

Passing sieve No. 12 after 100 revolutions.

Passing xieve No. 12 after 500 revolutions.

The above ratio should not exceed 0.22. If such ratio is more than 0.22, then the

material of base shall be rejected.

In the above test, the sample is sieved after 100 revolutions on sieve No. 12 then the

same sample is put back into the same apparatus to complete to 500 revolutions and

then sieved on sieve No. 12 then the ratio is calculated using the above formula. Sample

shall not washed in either stage, unlike the normal abrasion test where samle is washed

on sieve No. 12 after the end of test to calculate the normal abrasion percentage.

The soundness (ASTM C88) of coarse aggregate when tested by sodium sulphate

method shall not exceed 12% loss. The soundness of coarse aggregate when tested by

magnesium sulphate shall not exceed 16% loss.

C. Sieve analysis tests shall be performed on samples of base course aggregate where

and as directed by the engineer as follows:

1. Gradation tests shall be performed on samples of base course taken after mixing with

water and spreading before compaction and shall comply with Clause 14.02 with

maximum % passing sieve No. 200 being 10%

2. Gradation tests shall be performed on samples of base course taken after the required

compaction and the maximum allowable percentage passing sieve No. 200 shall not

exceed by more than 3 with the maximum material passing sieve 200 shall not

exceed 13 provided that gradation shall comply with Clause 14.02

The thickness of the compacted layer(s) shall be measured and recorded when

performing field density test; and sieve analysis test on samples taken from compacted

layer in place.

1.3 Construction

Aggregate for base course shall be delivered to the roadbed as uniform mixtures and

shall be spread in layers or windows. Segregation shall be avoided and the base shall be

free from pockets of coarse or fine materials.

Where the required thickness is 20 cm or less the base material shall be spread and

compacted in one layer. Where the required thickness is more than 20cm the base

material shall be spread and compacted in 2 or more layers of approximately equal

thickness, and the maximum thickness shall not exceed 20cm. The base course shall be

spread by graders or other approved mechanical method, watered shaped, and

compacted to the required grade and cross-section. The finished surface of the base

course shall not vary at any point more than 1 cm above or blow the grade established

by the Engineer. In addition to level checking, longitudinally the surface shall be

20

checked with a straight edge of 4 meter long, irregularities in this direction shall not

vary more than 1 cm. A minimum of 12 levels of the base every 100m shall be taken

and if 3 or more of these levels exceed the tolerance given then the Contractor shall

regrade the entire 100m length. If less than 3 of the levels exceed the tolerance then the

Contractor shall make good these points. The aggregate base shall be compacted to not

less than 100% of the maximum density determined in accordance with the latest

modified AASHTO T-180-D.

the base course shall be maintained in a condition satisfactory to receive and

subsequent base or surfacing material. Aggregate base course which does not conform

to the above requirement shall be reshaped or reworked, watered and thoroughly

recompacted to conform to the specified requirements.

1.4 Method Of Measurement

Base course shall be measured according to Drawings and paid for per Bill of quantities

in place, acceptably laid and compacted.

21

SECTION C: CONCRETE WORKS

Part 1 - General

1.1 Description

a. Work included: The extent of work required under this section of the specification

consist of the provision of all labor, plant and equipment and performing all

operations in connection with all concrete and precast concrete work, complete in

every respect shown on the drawings, described in this specification, and as directed

by the Engineer.

b. Related work: Drawings and general provisions of Contract, including General and

Supplementary Conditions, Bills of Quantities and Specification sections, apply to

work of this section.

1.2 Quality Assurance

a. Codes and Standards:

1. The following abbreviations covering the standards used for the works under the

contract shall have the significance set forth opposite each :

BS : British Standards Specifications.

CP : Code of Practice.

ASTM : American Society for Testing and Materials.

ACI : American Concrete Institute.

ISO : International Standards Organization.

JS : Jordanian Standards.

2. These works have been designed to incorporate and utilize economically goods,

materials and workmanship to various specifications which are detailed herein.

Reference is commonly made to British Standards (BS) and British Standard Codes of

Practice (CP) and Jordanian Standards (JS) and to the American Society for Testing

and Materials Standards (ASTM). Different national or international standards (DIN

or ISO etc.) that correspond to the specified standard may be used provided that their

requirements are not less stringent, and provided that the Contractor presents copies

of such standards translated into English. If any redesign of the works is necessitated

by the adoption of such alternatives the costs incurred shall be borne by the

Contractor. Those references shall in every case be deemed to include the latest

edition or issue of such standards.

3. Definitions: Reference in the specification to the term Local Authority is deemed to

denote the Local Building Authorities with statutory powers to control the quality of

work in the area concerned.

Part 2 - Products

2.1 Materials

22

a. Aggregates Generally: The Contractor's attention is particularly drawn to the

importance of ensuring that all naturally occurring aggregates are free from all traces

of chloride. All aggregates shall be thoroughly washed water in accordance with BS

2148 or any other equally approved standard and from an approved source.

b. Fine Aggregate:The fine aggregate shall comply in all respects with BS 882 or any

equally approved standard and shall consist of well graded course sand, mainly

passing a 4.75 mm BS test sieve as defined therein.

c. Coarse Aggregate: The coarse aggregate shall comply in all respects with BS 882 and

shall be retained at 4.75 mm BS test sieve, and shall be well and evenly graded.

d. Cement: Ordinary Portland cement shall conform to Jordanian Standards.

Sulfate resisting Portland cement shall conform to Jordanian Standards.

e. Waterproofing Agents: Water proofing liquid shall be Vandex or equivalent.

f. Lightweight Aggregates: The coarse and fine lightweight aggregates shall comply in

all respects with BS 3797 or JS. The coarse aggregate shall be 20 mm nominal size

graded aggregate.

g. Water: All water to be used in the works shall be clean and free from all harmful

matter in suspension or solution. The Contractor shall at his own cost have the water

analyzed by a laboratory approved by the Engineer, and obtain a certificate for each

source of water that it contains no chemical or organic impurities in suspension or

solution harmful to concrete, steel, finishing and all other parts of the works. If a

water supply cannot be found which is free from such impurities the Contractor shall,

at his own expense, treat the water to remove all such impurities. In either case,

analyses of the water shall be carried out during the construction of the works upon

the instructions of the Engineer.

h. Steel Bar and Fabric Reinforcement: All reinforcement shown on the

drawings unless otherwise specifically mentioned shall be hot rolled or cold worked

high yield deformed bars with a minimum characteristic yield strength of 414 N/mm2

complying with Jordanian Standards. Bar diameter 10mm or less shall have a

characteristic yield strength of 276 N/mm². Steel fabric reinforcement shall be square

mesh fabric complying with BS 4483.

i. Binding Wire: Binding wire where used for connecting reinforcement shall be No. 16

gauge soft annealed iron wire.

j. Concrete strength shall be as follows:

1. B-200 for blinding beds- Class D. (20 N/mm2).

2. B-300 for reinforced concrete- Class A. (30 N/mm2).

3. B-250 for reinforced concrete- Class B. (25 N/mm2).

k. PVC Water-Stop: The PVC for PVC water-stops shall be high grade virgin polyvinyl

chloride containing no filler nor reclaimed or scrap material. It shall comply with the

requirements of BS 2571 for type A3 Class 1 but shall have improved tensile

qualities. The minimum tensile strength shall be 2,000 p.s.i. (140 kg/cm²) and the

23

minimum elongation at break shall be 300 per cent. The BS softness shall be 45

degrees. They shall be obtained from a manufacturer approved by the Engineer, and

stored in accordance with the manufacturer's instructions.

l. Cellular Polystyrene:

1. Cellular polystyrene shall have a density greater than 24 kg/m³, a minimum

compressive strength at 5%, deformation of 0.2 N/cm² and maximum water

absorption of 2% by volume and shall be approved by the Engineer before fixing. It

shall be pre-cut to the requisite sizes and carefully placed to ensure conformity with

the drawings. It shall be properly fastened, braced and anchored to reinforcement to

prevent displacement of floatation during placing of concrete.

2. Polystyrene sheets for forming expansion joints between beam faces and between

walls, and for forming cavities in concrete walls shall be an approved material.

Thickness of sheets shall be comparable with the requirements shown on the

drawings.

m. Releasing Agents: Only chemical release agents, mould creams or mould oils which

contain a minimum amount of surfactant will be permitted. Water Soluble emulsions

and oils without surfactant additive must not be used. When concrete surfaces are to

receive an applied finish the Contractor shall ensure that release agent used will not

affect the finish of bonding to the concrete. Details of the releasing agent proposed by

the Contractor shall be submitted to the Engineer for approval, at least 14 days before

it is required for use.

2.2 Storage Of Materials

a. Aggregates: The aggregates shall be stored in approved containers or on a concrete

slab in such a way that contamination from other materials and intermixing of the

various gradings will be prevented. The aggregate shall be deposited in a way that

will prevent segregation through dropping on to the peak of a high heap.

b. Cement: The cement shall be stored in a weatherproof shed exclusively for this

purpose. The shed shall be large enough to allow proper aeration and effective

separation of the various consignments and separate stacking of different types.

Cement shall be stored on site for not more than 21 days, after this it must be removed

from site at the Contractor's expense. Alternatively, the cement be stored in silos of

approved design.

c. Reinforcement: The reinforcement should be clear of the ground without distortion

and should be protected from contamination by other materials.

d. Releasing Agents: All releasing agents must be stored strictly in accordance with the

manufacturer's instructions.

e. Formwork: When formwork is not used it shall be protected against damage and the

effects of weather.

2.3 Testing Equipment

24

a. The Contractor shall provide on site the following equipment:

1. Sufficient 150 mm cast iron test cube moulds to enable the Engineer to carry out the

test requirements of this specification.

2. Slump cone, baseplate and tamping rod.

3. Maximum and minimum thermometers and aggregate thermometers.

The following items shall also be provided if and when specifically requested by the

Engineer.

Suitable graduated measuring tubes for measuring the moisture content of fine

aggregate.

4. A set of British Standard grading sieves.

5. Suitable weighing scales.

6. Compacting Factor Test equipment.

7. Aggregate drying oven.

2.4 Concrete Mixes

a. Generally: The Contractor shall use his own specially designed mix to comply with

the requirements of this specification in respect of the strength and of the finish

qualities of concrete.

b. Mix Design for Special Concrete Mixes:

1. Mix proportions shall be designed by the Contractor for each special concrete mix

except where, in factory work it can be shown that over a period of time the specified

works cube strength of the concrete has been consistently attained.

2. The mix shall be designed generally in accordance with the requirements of the

Jordanian Standards.

3. The mixes shall be designed to have sufficient workability to allow concrete to be

placed and properly compacted by the methods to be used on site.

4. Complete calculations for the mix proportions and the information and assumptions

on which they are based, shall be submitted to the Engineer before any preliminary

strength cubes are made.

5. When the mix has been approved by the Engineer no variations shall be made in the

proportions, the original source of the cement and aggregate or in the type, size and

grading zone of the latter without the consent of the Engineer.

a. All mixes to contain 20mm aggregate unless otherwise noted on the drawings.

b. All mixes shall be vibrated.

c. Batching:

25

1. Aggregate and cement shall be batched by weight. The moisture content of the coarse

and fine aggregate shall be determined daily when concreting is in progress and

appropriate allowance made to the quantity of water delivered to the mixer.

2. All weight batching plant shall be to the Engineer's approval. If bulk storage of

cement is used it shall be supplied to the mixer by weighed delivery from an approved

storage hopper. For bagged cement, the aggregate used in each batch shall be so

arranged that one or more whole bags of cement are used in each batch.

d. Mixing on site if applicable:

1. All mixing shall be carried out in a power driven machine fitted with a water supply

device capable of being controlled so that the correct measured quantity of water is

delivered to each batch. The accuracy and calibration of this device shall be rigidly

maintained, within the tolerances described in BS 1305. The quantity of water used

shall be varied to suit the moisture content of the fine aggregate. The water/cement

ratio shall be approved by the Engineer before using.

2. The materials shall be mixed well and uniformly distributed. The mass shall be of

uniform consistency and color, but in no case shall the mixing time be less than two

minutes after all the materials have been added to the drum. The drum of all mixers

shall revolve at the speeds recommended by the manufacturer. Hand mixing will only

be permitted in an emergency and if written permission has been given by the

Engineer. A 50% increase in cement weight for a particular mix will also be required.

Before changing one mix for another using a different type of cement and after each

day's work, all mixers, plant, tools, etc., are to be thoroughly washed and cleaned to

remove all traces of cement.

2.5 Concrete Tests

a. Concrete Strength Test: 150 mm concrete test cubes shall be made, cured and tested

in accordance with BS 1881 from samples of concrete taken from the point of

deposition of works Cubes and from samples of materials for Preliminary Cubes.

b. Concrete Slump Tests:

1. A slump test shall be carried out on every pour of concrete and a record kept on site of

all slump tests taken, which shall be submitted to the Engineer at weekly intervals.

2. The respective slumps to be used for various of the structure shall be subject to the

approval of the Engineer and shall normally have a value of 50 mm with a tolerance

of 12 mm for 75% of tests with a maximum tolerance of 25 mm for all tests.

3. Test specimens shall be formed in a mould 300 mm high, 100 mm diameter at the top

and 200 mm diameter at the bottom. The inside of the mould shall be cleaned before

each test and the mould placed on a hard flat impervious surface. The concrete mould

shall be formed in four layers with 25 strokes of a 16 mm diameter, 600 mm long rod.

After filling and tamping the surface of the concrete shall be struck off level with the

top of the mould, leakage cleaned from around the base of the mould, and the mould

then lifted vertically from the concrete.

26

4. The slump shall be measured as the difference between the height of the concrete

before and the greatest height after the removal of the mould. All tests to be carried

out within a period of two minutes of sampling.

c. Preliminary Cube Test Procedure:

1. Except where in controlled conditions it can be shown over a period of time that the

specified works cube strength of the concrete has been consistently attained,

preliminary strength cube tests shall be carried out at least four weeks before the

commencement of concreting on site.

2. Preliminary cubes shall be made for each mix from three samples of aggregate and

from each sample of aggregate six cubes shall be made, three for testing seven days

after casting and three for testing twenty-eight days after casting.

3. Each set of three cubes tested twenty-eight days after casting shall be accepted as

satisfactory if the average strength of the three cubes is not less than the preliminary

design strength and the difference between the greatest and the least strength is not

less than 20% of the average.

4. Results of all preliminary tested cubes shall be sent to the Engineer as soon as they are

available and before mixing concrete for placing on site or in moulds.

d. Work Cubes Test Procedure:

1. A sample of concrete shall be taken on two separate occasions during each of the

mixes is used on site. The Engineer/ his representative will direct to select the samples

at site. Subsequently, samples shall be taken for every 50 cu.m of concrete placed

with a minimum of one sample taken every second day on which the mix is used.

2. From each sample four cubes shall be made, one for testing seven days after casting,

two are for testing twenty-eight days after casting and one to be kept on site and only

disposed of on the Engineer's written instruction.

3. This procedure also applies to the manufacturer of precast concrete.

4. The results of the first forty cubes tested shall be analyzed as set in CP 114, Clause

209 C, an example of the method to be adopted being given CP 116, Appendix B. The

mix proportions shall be modified if any of the conditions set out in CP 114, Clause

209 C are not satisfied.

5. Subsequently, all cubes tested shall be analyzed as above and the standard deviation

calculated monthly for all results up to that date.

6. All cubes shall be clearly marked with the date of casting and accurate records shall

be supplied to the Engineer, stating the dates of taking and testing samples, together

with the results of tests and the exact position from which the samples were taken.

e. Cost of Tests:

1. The cost of taking and testing of concrete samples under this specification, including

transport to a testing station where required, shall be met by the Contractor, whether

the test results are satisfactory or not.

27

2. All preparation and testing of concrete samples shall be carried out in accordance with

BS 1881 at a testing station approved by the Engineer and under his direct technical

supervision, who shall receive certified copies of the results of all tests.

Part 3 - Execution

3.1 Workmanship

a. Transporting and Placing:

1. The concrete shall be handled and transported form the mixer to its final position in

the work as quickly as possible and in such a manner as to avoid segregation, loss of

any of the ingredients of evaporation of water.

2. All concrete shall be placed in a manner as to avoid segregation. The Contractor shall

submit details of his proposed method of placing for the Engineer's approval.

3. Concrete shall be deposited in layers not exceeding 300 mm compacted thickness and

no concrete shall be placed round any reinforcement until the latter has been approved

by the Engineer.

4. Where concrete is transported by non-agitating equipment, discharge shall be

completed within thirty minutes after mixing.

5. In no case shall more than thirty minutes elapse between the completion of discharge

final placing and after period the concrete shall not be further disturbed.

b. Compaction:

1. The concrete shall be thoroughly compacted by means of suitable tools approved by

the Engineer, both during and immediately after placing.

2. The concrete shall be worked round reinforcement and against the forms avoiding all

occurrences of voids or honeycombing.

3. Where compaction by mechanical vibration is used the formwork shall be suitably

strengthened and precautions taken to avoid leakage of grout through the joints.

4. Vibrating Methods: Vibration shall be carried out in accordance with the following:

- For the poker type of vibrator, move the poker frequently and avoid leaving the poker

in one place for any length of time.

- The vibrator must not be used to move concrete into place.

- The poker must be withdrawn slowly to avoid forming a hole in the concrete.

4. The poker must not be allowed to the sides of the formwork.

5. The poker must not be allowed to touch reinforcement which is already cast in

immature concrete (i.e. Concrete less than 48 hours old).

28

6. The poker should not be used to compact layers greater than 600 mm.

7. Formwork vibrators shall not be used unless expressly approved by the Engineer in

writing. External vibrators shall only be allowed. In no circumstances where the use

of a poker vibrator is not possible such as thin sections and where metal shutters are

used.

8. Surface vibrators may be used for thin slabs such as floors and roads. The surface

vibrator shall not be used for slabs exceeding 150 mm thickness.

9. Vibrators generally shall not be used after a decrease in volume of concrete is no

longer apparent and in no circumstances shall they be allowed to cause segregation.

10. At all times sufficient vibrators shall be used to adequately consolidate the concrete

whilst still fresh and a spare vibrator of the similar type to the ones being used shall

be immediately available in case of breakdown.

d. Curing:

1. All concrete during and after depositing is to be so protected that there will be no

avoidable loss of moisture from the surface for a minimum period of seven days.

Longer periods may be specified for special work. The Contractor shall submit for the

written approval of the Engineer the methods he proposes to use.

2. Approved methods of curing:

a. Spraying with an approved sealing compound.

b. Keeping constantly wet.

d. Covering with a waterproof membrane laid or wrapped around so as to be contact

with the surface. The membrane must not allow a free air flow over the surface of the

concrete.

3. Protection shall also be provided to prevent damage to freshly placed concrete due to

inclement weather, i.e. heavy rain or frost.

4. Before concreting commences the Engineer must be satisfied that the necessary

materials for curing and protection are immediately available close to the area of

concreting.

e. Concreting During Cold Weather:

1. Before the onset of cold weather Contractor shall inform the Engineer of the

precautions he proposes to take for concreting in cold weather. Below an air

temperature of 5C no concreting shall take place without prior approval by the

Engineer of the precautions to be taken.

2. The Contractor will inform the Engineer, in advance, of his proposals for concreting

in cold weather for precautions to be taken when the air temperature falls below 5C

within three days after placing the concrete. The concrete temperature should not fall

below 5C from the time of mixing until three days after placing.

f. Concreting During Hot Weather:

29

1. The Contractor shall take special measures in hot weather to ensure that the

temperature of the concrete when deposited does not exceed 32C. This also applies

to the manufacturer of precast concrete elements.

2. Such measures are to be approved by the Engineer and shall include some of, or if

necessary all of the following:

a. Aggregates:

1. Aggregates stock-piles sited in shade even if this has to be provided temporarily.

2. Aggregate regularly sprinkled with water to encourage cooling by evaporation.

Whenever possible successive layers watered during stock piling.

b. Water

1. Water for mixing obtained from the coolest possible economic source.

2. Water storage tanks sited in shade, permanent or temporary.

3. Water storage tanks insulated or buried below ground where site conditions permit.

4. All distribution pipes, or water trucks insulated or painted white.

5. Sufficient fog sprays shall be available at all times during concreting operations.

c. Cement: The cement store should preferably be sited in the shade.

d. Mixing and Placing Concrete:

1. The mixing plant and delivery equipment sited in shade wherever possible and

organized in such a way that the interval between mixing and placing is the absolute

minimum.

2. Where shade is impossible to provide, equipment painted white.

Immediately before concrete placing, formwork, reinforcement, cable ducts, etc.,

sprinkled with cool water.

Curing and Protection: Proper curing with adequate protection from sunlight

maintained without interruption. Windbreak shall also be provided.

Exposed surfaces always and, where practicable, shuttering protected from direct

sunlight.

e. Cutting Away: The Contractor shall not cut away any concrete work without the

written authority of the Engineer, and the Contractor will be held responsible for the

safety of any work damaged due to authorized cutting either by himself of his sub-

Contractors.

3.2 Ready Mixed Concrete

a. The Contractor shall be permitted to use "Ready Mixed Concrete" subject to the

following additional requirements, and only with the written agreement of the

Engineer.

b. The name and the address of the works of the supplier is to be submitted to the

Engineer, and his acceptance of the use of such supplier shall be obtained prior to

placing the order. Notwithstanding any such authorization by the Engineer, the

Contractor shall take full responsibility that the ready mixed concrete complies with

the requirements of the Specification.

c. The concreting materials shall comply with the requirements of the specification and

shall be tested in accordance with the Engineer's instructions. The cost of such testing

will be the responsibility of the Contractor. Works set cubes shall be taken on site be

30

the Contractor, in accordance with the Engineer's instruction and as described in this

Section of the specification.

d. The Contractor is to ensure that a record is at the supplier's works of the exact time

when the concreting materials are mixed.

e. In the case of plant mixed concrete, the concrete shall be carried in purpose made

agitators, operating continuously. When truck mixed concrete in used, water shall be

added under supervision either at the site or at the central batching plant as agreed by

the Engineer but in no circumstances shall water be added in transit. In no case shall

more than 45 minutes elapse between the addition of water to the mix and the placing

of the concrete.

f. Delivery notes shall record the following information. The Contractor shall keep all

such delivery notes for inspection by the Engineer :

1. Date and time of arrival of truck.

2. Time and Place of mixing of concreting materials.

3. Registration number of truck and name of depot.

4. Time and Place of adding water to material.

5. Time when concrete is placed in position and left undisturbed.

6. Mix type.

7. Position in the structure where the concrete is placed.

8. Whether test cubes were taken from this delivery.

9. Slump

10. Details of additives, where the use has been approved.

3.3 Bending And Fixing Of Reinforcement

a. Bar Bending Schedules: The Contractor shall prepare bar bending schedules for fixing

which show location, diameter, length, spacing, beds and laps for all reinforcement.

The schedules shall be approved by the Engineer before any concrete work is

commenced.

b. Bending and Cutting:

1. All dimensions on bending schedules are to be read in conjunction with BS 4466, ACI

Code (ACI-315) or any equally approved standards. Bars are to be bent to the shapes

and radius shown on the drawings and bar schedules and, except at bends and cranks,

shall be perfectly straight. Any bar showing signs of cracks, or brittleness shall be

rejected.

2. Bars are to be cropped to length and flame cutting will not be allowed.

31

3. Bending and re-bending bars on site as a temporary expedient will only be permitted

if the operation is carried out using the correct equipment. The latter must be

adequate to limit radius of the bend or re-bend at 12 times the bar diameter.

4. The use of heat to facilitate bending shall not be permitted with cold worked bars

without the approval of the Engineer.

c. Fixing:

1. The Contractor shall assemble all reinforcement in accordance with the drawings, by

wiring. Welding will be permitted only where shown on the drawings or with

approval of the Engineer. Cover shall be maintained by the proper use of chairs,

spacers or nonporous concrete blocks, sufficient to prevent displacement of the bars

during concreting. Plastic spacer blocks will not be permitted on any surfaces

exposed to weather or on other damp positions. No steel shall be fixed or covered by

concrete unless it is in the correct position and free from mud, oil, paint, retarders,

loose rust, millscale or other foreign matter.

2. A steel fixer shall be in attendance during concrete to rectify any unavoidable

displacement as the concrete is placed.

3. Unless otherwise shown on the drawings, concrete cover to reinforcement shall not be

less than the following:

a. Columns and beams with externally exposed faces 30 mm.

b. All other columns and beams 30 mm.

c. Suspended slabs with externally exposed faces 30mm.

d. All other suspended slabs -25mm.

e. Foundations - 70 mm

4. Columns starter bars shall be held accurately in position with suitable templates. No

bars must be placed by pushing into the wet concrete. Where welding is required

between bars or between bars and plates, it is to be carried out in accordance with BS

1856 and all welders employed on the work are to be approved by the Engineer. If

required by the Engineer, a welder may be required to carry out additional test pieces

and if there are not satisfactory the Engineer shall be entitled to ask for particular

welder to be replaced.

d. Site Provision: The Contractor shall provide on site bar cutting and bending facilities

to cater for minor variations without incurring avoidable delays.

3.4 Formwork

a. Materials:

1. Temporary formwork shall be constructed of timber, sheet metal, or other approved

material.

2. Unless otherwise specified, permanent formwork shall be constructed of slabs or

blocks of precast concrete, natural stone, brickwork, or other approved material. Slabs

or blocks shall have an exposed surface or the specified quality : they shall have

positive anchorage to the structure, and the joints between them shall be made tight

32

with mortar or by such other means as will prevent the leakage of grout from the

concrete.

b. Design:

Formwork shall be so designed and constructed that concrete can be properly placed

and thoroughly compacted.

Formwork shall be capable of adjustment to the lines and dimensions of the finished

concrete, and it shall be sufficiently strong to resist, without excessive distortion, the

pressure of concrete during its placing and compaction, and other loads to which it

may be subjected. It shall not be liable to suffer distortion under the influence of the

weather.

c. When concrete is to be vibrated, special care shall be taken to ensure that the

formwork will remain stable and the joints tight.

d. Deflection and Camber: The Contractor shall make allowance for any settlement or

deflection of formwork that is likely to arise during construction, so that the hardened

concrete conforms accurately to specified line and level. The Contractor shall also

make allowance on the formwork for any camber specified by the Engineer to allow

for the elastic deflection of structural members and deflection due to creep of the

concrete.

e. Supports:

1. Formwork shall be constructed so that formwork to the sides of members can be

removed without disturbing the soffit formwork or its supports. Props and supports

shall be designed to allow the formwork to be adjusted accurately to line and level

and to be erected and removed in an approved sequence without injury to the

concrete.

2. All floor slabs shall remain propped during the construction of the total concrete

frame. The weight of the floor slabs and other incidental loads shall be carried directly

through these props to suitable foundations at ground or basement level. All floor

slabs shall be struck at the highest level first and working progressively down the

frame to the lowest level.

3. Props and bracing shall be provided for the temporary support of composite

construction were separately specified.

f. Joints and Edges:

1. All joints in formwork shall be close fitting to prevent leakage of grout from the

concrete.

2. At construction joints formwork shall be tightly secured against previously cast or

hardened concrete to prevent the formation of stepping or ridges in the concrete.

3. Formwork shall be constructed to provide straight and through angles, arises, or

edges. were chamfers are shown on the drawings, the fillets shall be accurately cut to

size to provide a smooth and continuous chamfer.

33

g. Ties: The material and position of any ties passing through the concrete shall be to the

Engineer's approval. Except where corrosion of a metal type is important it shall be

possible to remove a tie so no part of it remaining imbedded in the concrete shall be

nearer to the finish surface of the concrete than the specified thickness of cover to the

reinforcement. Any holes left after the removal of ties shall be filled with concrete or

mortar of approved composition, unless specified otherwise.

h. Sundries:

1. Formwork shall be provided to the top surface of concrete where the slope or the

nature of the work requires it.

2. Provision shall be made for forming holes and chases for services and for building in

pipes, conduits, and all other fixings.

i. Cleaning and Treatment of Formwork: All rubbish, chipping, shavings, sawdust and

dirt shall be removed from the interior of the formwork before concrete is placed. The

formwork to be in contact with the concrete shall be cleaned and treated with a

suitable release agent in accordance with the manufacturer's instructions. Care shall

be taken that oil or dirt is kept from contact with the reinforcement or with concrete at

any construction joints. Retarding agents shall not be used except with the permission

of the Engineer. Formwork shall be thoroughly cleaned after each use. Damaged or

distorted formwork shall not be used.

j. Striking or Removal of Formwork:

1. All formwork shall be removed without shock or vibration that damage the concrete.

In no circumstances shall formwork be struck until the concrete reaches a cube

strength of at least twice the stress to which the concrete may be subjected at the time

of striking.

2. The formwork to vertical surfaces such as walls, columns and side of beams may be

removed after 12-14 hours in normal weather conditions although care must be taken

to avoid damage to the concrete, especially to arises and features.

3. Where the early concrete strengths are not accurately known, the following minimum

times shall elapse before removal of formwork.

Minimum Period Before Removing Formwork

Concrete Elements Effective Span

(m)

Average Temperature ( Degrees Centigrade)

21 and

Over

( 10 - 20 ) ( 5 - 10 ) 5 or Less

Concrete Age in Days

Non load bearing

columns and walls and

beam soffits.

-

2

3

5

7

Walls, Columns, and

vertically loaded

-

5

6

7

9

34

elements only.

Less than 3.0 7 10 14 21

Slabs 3.0 - 6.0 10 14 21 28

Greater than 6.0 14 21 28 28

Less than 3.0 10 14 21 28

Beams 3.0 - 6.0 14 21 28 28

Greater than 6.0 21 28 28 28

4. The times given for the removal of props are based on the assumption that the total

plus dead weight to be supported at the time of removal is not more than one half the

total design load. For horizontal members where the loading is a higher proportion of

the total design load these time may need to be increased.

5. The Contractor shall be responsible for any injury to the concrete formwork and for

any damage caused by, or arising from the removal and striking of the forms and

supports. Any advice, permission or approval given by the Engineer relative to the

removal and striking of forms and supports shall not relieve the Contractor of

responsibility.

k. Polystyrene at Expansion Joints: After striking formwork to sides of beams and faces

of walls where the drawings shown an expansion joint or separation between concrete

faces to be formed, fix polystyrene sheets of the appropriate sizes and thickness

before casting the adjacent beams and walls. Secure the polystyrene to cement faces

with an adhesive recommended by the manufacturer. After concrete is poured, rake

out polystyrene as necessary to receive expansion joint assemblies.

L. Formwork in Relation to the Surface Finish of Concrete:

1. Sawn Formwork: Sawn formwork is for covered concrete work and shall be

constructed of sawn boards, sheet metal panels or other material.

2. Wrought Formwork: Where formwork is described as "Wrought" the surface of the

concrete is to be exposed and shall be finished smooth and even, free from all board

marks, projections, pits, honey-combing and other defects and all arises shall be

straight and true. To obtain the finish, forms shall be lined with matt plastics, plywood

or other material to the satisfaction of the Engineer.

3. Smooth Finish Formwork:

a. Smooth finish formwork is to produce uniform smooth finish of high quality, with

even and true arises for exposed concrete. The finished concrete surface shall be non

staining have minor blemishes only and there shall be no staining or discoloration

from release agents, formwork materials or other sources. The forms shall be designed

to have as few joints as possible and shall be arranged in a uniform pattern as shown

on the drawings. Wherever possible joints between sheets shall be arranged to

coincide with architectural features such as opening or changes of plane.

b. The forming shall have an impermeable form face, using matt plastics, impregnated or

coated ply, or a form face with low and uniform permeability. Joints between

formwork sheets shall be rebated to maintain accurate alignment of the form faces.

35

c. Details of formwork design and materials to be used for form faces shall be submitted

to the Engineer for approval.

4. Bush Hammer Finish:

a. Concrete surfaces scheduled to have a bush hammer finish shall be cast against

wrought formwork as specified. Concrete surfaces shall be properly cured before bush

hammering is begun.

b. Bush hammer finish shall be executed by skilled craftsmen using air hammers and

bush tools as designed for work of this nature. Special care shall be taken to prevent

chipping out of pieces of concrete and leaving ragged, unsightly corners and

interstices.

m. Finishes:

1. All concrete surfaces which are not exposed are to be left as struck from the mould,

except that any surfaces which are found to be honeycombed shall be made good as

soon as they have been inspected by the Engineer. The making good shall be done

with a mixture of fine aggregate and cement in similar proportions to the concrete,

and as dry as possible.

2. All exposed concrete surface with sawn formwork are to be left as struck. The final

surface shall be free from all irregularities and discoloration, and shall be even level

surface. The final surface for all floor slabs is to be travel smooth.

3. If any honeycombing is found on exposed faces, the Engineer's decision as to whether

the concrete shall be cut out and replaced or made good shall be final.

n. Re - using Formwork: Care shall be taken when re-using formwork that its

surface is clean and smooth and that it is free from warping, twisting or other

deformities. Any formwork which has, in the Engineer's opinion, deteriorated

sufficiently to render it unsuitable for the work shall be rejected and must be broken

up at once, new formwork being provided at the Contractor's expense.

o. Control of Concrete Color:

1. It is imperative that where special concrete finishes, i.e., where smooth finish

formwork and bush hammer finish are required, the color of the concrete shall be

consistent. The following measures shall be taken to achieve this requirements.

Concrete mixes, once established, shall be kept constant within the limits imposed by

minor aggregate variations. Approved samples of special finishes shall also be used as

standards of color and shall be kept on site or at precast works close to the work in

hand.

2. Throughout the use of one particular finish the coarse and fine aggregate must each be

obtained from the same quarry or pit and the cement must be obtained from the same

manufacturer.

3. Before casting any concrete with special requirements or finishes, the Contractor shall

forward to the Engineer letter from his suppliers or aggregates and cement and/or

ready-mixed concrete agreeing to abide by this clause.

4. The same formwork lubricant shall be used for all concrete of the same surface finish.

36

5. Frequent inspection shall be made of the lining to formwork or moulds to ensure a

constant texture. The Engineer will order formwork to be relined or renewed if in his

opinion the surface has altered sufficiently to give a different texture or give rise to a

variation in the drying out time on the concrete. New and re-used boards shall not be

mixed on the same elevation of floor level. The specified curing procedure shall be

rigorously followed and the sticking and curing times kept effectively constant,

varying only to allow for differences of humidity and temperature.

6. If the Contractor requires to use rapid hardening cement or take other precautions for

concreting in cold weather which may affect the color of the concrete, then

precautions shall be taken throughout the concreting of each particular finish.

7. Any concrete showing an unacceptable variation in color as a result of the Contractor

not conforming with this clause shall be cut out and replaced at the Contractor's

expense.

p. Samples of Special Concrete Finishes:

1. The Contractor shall submit to the Engineer samples of the formwork materials to be

used for wrought and smooth finish formwork. After approval of the formwork

materials, the Contractor shall supply as many small samples (450 by 750 mm

minimum) as may be required by the Engineer to approve the finishes.

2. Similarly, samples shall be submitted showing bush hammer finish. Thereafter, the

Contractor shall supply one full size sample for each finish which shall be cast in the

same manner as on the job and contain the same reinforcement, etc.

3. On approval of the large samples, they shall be kept in a prominent position in the site

and used as standards against which the finished work is judged.

3.5 Construction Joints

a. Once concreting has started it must be carried on to its natural completion to properly

constructed day work joints. Vertical stop boards must be provided to form these

joints, with joggles wherever possible, provision shall be made for the reinforcement

to run continuously through the joint without being temporarily bent up or otherwise

displaced, and any concrete flowing past the joint to be hacked off as soon as it is set.

b. Before concreting is resumed, the surface of the concrete on the first side of the joint

shall be thoroughly cleaned, and the surface removed so as to expose the aggregate,

by light bush hammering, wire brushing or other approved method.

c. The new concrete shall be carefully worked up against the hardened surface of the

joint. Wherever possible, except in the case of exposed face work where color is

important, the proportions of cement and fine aggregate to coarse aggregate shall be

increased in the batches to be placed against the joint.

d. Unless otherwise shown on the drawings, the maximum distance between

construction joints shall be 10 meters in reinforced walls.

37

e. Concrete in walls shall be placed in lifts not deeper than 1.8 meters. Concrete in

columns shall be cast in one continuous operation between floors with no intermediate

constructions joint.

f. Floor slab shall be cast in bays which are approximately square and in no case the

longer dimension of the bay be greater than twice the shorter dimension.

g. The Contractor shall submit to the Engineer for discussion and approval a marked up

drawing of the construction showing proposed positions of construction joints at least

7 days before the relevant work commences.

3.6 Fixing Of Waterstop

Water-stops shall be carefully maintained and properly protected from damage and

the harmful effects of light, heat and frost during all stages of construction. Where

centrally placed water-stops are used the stop-boards on each side of the water-stop

shall be accurately brought to match the profile of the water-stop. The concrete shall

be carefully compacted under and around the water-stop so as to leave no activities

joints shall be welded in accordance with the manufacturer's printed instructions.

3.7 Joint Filler

The joint filler for slabs shall be export quality Flexcell or Bitucell manufactured by

Fosroc-Expandite,UK., or similar approved bituminous impregnated fiberboard

expansion joint filler. Where required the exposed edges shall be raked out for a depth

of 2.5 cm. Point with an approved two-part polysulphide-based elastomeric sealing

compound in accordance with BS 4254. Joint shall extend full depth of slab unless

otherwise shown on the drawings.

3.8 Tolerances

a. The following tolerances have been used when considering the fitting together of the

various components in the building, i.e. the assembly of precast units, fitting of

concrete cladding, window and door frames, etc., where they affect the final

appearance and functions of the structure. They will not be enforced in positions

where these factors are unimportant. Although all work shall be constructed

accurately to the dimensions shown to the satisfaction of the Engineer.

b. The tolerances on the elements of construction shall only be additive within the limit

allowed, i.e. errors in plumb of columns of wall, etc., shall be corrected on successive

lifts.

c. Levels of beams and slabs - Soffits levels to be within 3 mm of the true position,

taking the specified cambers into account.

d. Plumb of vertical members - 5 mm per storey.

e. Sections of in situ concrete members - = 3 mm.

38

f. Flatness of surfaces, other than those to be cambered, measured from a line stretched

between any two points of the surface:

up to 3 meters long + 1.5 mm.

up to 6 meters long + 3.0 mm.

up to 9 meters long + 4.5 mm.

up to 12 meters long + 6.0 mm.

above 12 meters long + 7.0 mm.

g. Clear distance between adjacent columns and walls at any level, where accuracy is

required for doors, windows, etc. : + 5 mm.

h. All precast units are to be fixed within a tolerance of a 3 mm per unit. This deviation

may consist of + 1.5 mm at one end and + 1.5 mm at the other end of the unit, or 0 at

one end and + 3 mm at the other, provided the step in surface of adjacent units does

not exceed 1.5 mm or such greater figure up to 3 mm where considered permissible

by the Engineer, without affecting the appearance of the work.

3.9 Fixture And Opening Within The Structure

a. Details of any fixtures to be cast into the concrete shall be to the approval of the

Engineer.

b. No fixtures shall be attached to the concrete by shot-firing without prior permission of

the Engineer. Notwithstanding any such authorization the Contractor shall take full

responsibility for any damage caused to the structure, and make good to the

satisfaction of the Engineer.

c. Details of any openings, holes, chases, etc., required to be formed, or cut in the

structure shall be approved by the Engineer prior to the work being carried out on site.

3.10 Temporary Loading During Construction

No temporary loading in excess of the loading shall be applied to any part of the

structure, without first submitting details of the temporary works, i.e. props or ties,

etc., necessary to protect the structure from damage, to the Engineer.

3.11 Precast Concrete For Lintels Over Openings

a. Generally: Unless otherwise specified precast concrete units shall be cast in concrete

nominal strength 25 N/mm2. All clauses in this section of the specification shall be

construed as applying to the manufacturer of precast concrete units unless specifically

excluded or amended by the following.

b. Casting:

1. Shall be performed either in an approved casting shop or on the site. If on the site the

casting area shall be adequately shaded to protect the members during curing. Precast

concrete units may be removed form their moulds as soon as the concrete has

achieved sufficient strength to resist the stresses due to demoulding and handling

without distortion.

39

2. Unless otherwise detailed on the drawings members shall be cast in convenient

lengths for handling. Any members not having reinforcement detailed for them shall

be reinforced sufficiently for handling.

c. Handling, Transportation and Erection:

1. Where applicable precast concrete units shall only be handled using the lifting

positions agreed with the Engineer. The Contractor shall ensure that at all times

during handling, transportation and erection the units are not subjected to overstress.

2. Bearing members such as lintels shall have the upper surface clearly marked to ensure

correct positioning in the work.

40

SECTION D: STONE WORKS

Part 1 - General

1.1 Description

a. Work Included:

1. Cut limestone cladding for exterior and interior walls.

2. Metal anchors, mortar, and joint pointing.

3. Joint sealant.

b. Related work:

1. Drawings and general provisions of Contract, including General and Supplementary

Conditions, Bills of Quantities and Specification sections, apply to work of this

section.

2. Related Sections:

a. Testing laboratory services.

b. Concrete supporting wall.

c. Bedding and pointing mortar.

d. Masonry supporting wall.

e. Masonry restoration and cleaning.

f. Masonry anchors from structural steel framing members.

g. Water repellent coating.

h. Sealant for joints.

c. Products furnished under this section: Placement of wall anchors and devices.

d. Products under this section: Metal fabricated items for building into cut stone.

1.2 Quality Assurance

a. Codes and standards:

1. ASTM A36 - Structural Steel.

2. ASTM A123- Zinc (Hot Galvanized) Coating on Products Fabricated from Rolled,

Pressed, and Forged Steel Shapes, Bars, and Strip.

3. ASTM A167- Stainless and Heat - Resisting Chromium - Nickel Steel Plate, Sheet,

and Strip.

4. ASTM C270 - Mortar for Unit Masonry.

5. ASTM C387 - Packages, Dry, Combined Materials for Mortar and Concrete.

6. ASTM C568 - Limestone Building Stone.

41

b. Quality Assurance: All stones for facing shall be selected well in advance of the time

required, samples of stone materials and dressing shall be submitted for the Engineer's

approval 30 days before delivery of any such material to site.

c. Qualifications:

1. Stone Suppliers: Company specializing in quarrying cut stone with minimum ten

years documented experience.

2. Installer: Company specializing in performing the work of this section with minimum

ten years documented experience.

3. Design anchors and supports subject to Engineer's approval.

d. Mockup:

1. Provide mockup of cut stone wall for Engineer's approval.

2. Construct stone wall mockup, 1.5 m long by 1.5 m wide, including stone anchor

accessories, sill and head details corner condition, and any necessary details

3. Locate where directed by Engineer on site.

1.3 Submittals

a. Shop Drawings: Indicate layout, pertinent dimensions, anchorages, reinforcement,

head, jamb, and sill opening details, control jointing methods. Include structural

calculations for the above for fixing details subject to the approval of the Engineer.

b. Product Data: Provide data on stone units, mortar products, and metal products,

including test reports and results.

c. Submit samples, illustrating minimum and maximum stone sizes, color range and

texture, markings, dressing, and surface finish.

d. Submit installation methods and field erection or setting drawings.

1.4 Product Handling

a. All stonework shall be carefully packed for transportation, exercising reasonable

precaution against damage in transit, and shall be delivered promptly as ordered and

in sequence in which it is to be erected.

b. Take all necessary precautions to prevent all stonework from chipping, cracking, or

other damage, during the unloading, and storage on the site. Damaged stonework will

not be allowed to be installed, and should any damage be found in erected work, such

work shall be removed immediately and replaced with new work and the Sub-

Contractor shall assume all expenses incurred there from.

c. The stone work shall be stored in the building site on planking set entirely clear of the

ground and shall be protected by proper means from damage to arise and from contact

with anything which would result in the accumulation of dirt, dust, grease or any other

42

staining, discoloring or disfiguring elements. During extended period of storage,

cover the cut stone with tarpaulins, non-staining building paper or boards.

d. During temporary storage on site, at the end of working day, or during rainy weather,

cover stone work exposed to weather with non-staining waterproof coverings,

securely anchored.

e. Cements and Limes: Shall be delivered in original sealed containers plainly marked

with name and brand of manufacture, and kept dry until use. Cements and limes

which are defective or show partial set or caking shall not be used and shall be

immediately removed from the premises.

f. Sand: Shall be stockpiled on platforms or otherwise protected from direct contact

with the ground and shall be so stockpiled and handled as to prevent the inclusion of

foreign deleterious substances.

1.5 Sequencing

a. Sequence work to coordinate the installation of stone work with installation of

adjacent construction.

1.6 Rates

a. The rates for stonework shall include the cost of supplying stone dressing, building

and all mortar used in the building of the stone and backing, etc. Stonework will be

measured by square meter for net area on one face, no extras will be paid for reveals,

corners, etc.

Part 2 - Products

2.1 Stone

a. Stone facing to walls shall be durable local stone, First Quality Whitish stone

Gamaian or Equivalent to be approved by the Engineer and of quality and standard

that meet the Jordanian specifications and standards set for stone.

b. Stone shall be even grained, free from cracks, seams, holes, shakes, objectionable

irregularities of colour, impurities, structural weaknesses and other defects that would

tend to increase unduly the deterioration from natural causes.

c. Stone Facing:

1. General:

a. Where Drawings indicate" stone work", it shall be of the thickness, sizes and profiles

as shown. All stonework shall be honed and/or polished finish where exposed,

unfilled and filled in areas specified hereinafter as selected by the Engineer.

Stonework shall be sound, dense and free from defects which may impair its strength

and durability. Care must be exercised in selecting panels for proper colour range

when matching, to produce an even overall colour range when panels are matched.

43

b. Thresholds shall be furnished the work herein and turned over to the tile setter for

installation. Edges shall be beveled to profiles shown with cut-out ends to engage

into door frame jambs. Coordinate trades for proper execution of work.

2. Thickness of Stone: For walls the minimum thickness of each stone shall be 5 cm at

ends and the greatest thickness of all stones to be 7cm.

3. Stone Dressing: Surface texture to be dressed Taltesh for all surfaces and Matabah for

window jambs, reveals and setbacks. Sample to be prepared by Contractor.

2.2 Mortar Materials

a. Cement :

1. Used for setting beds shall be Portland cement non-staining, conforming to current

ASTM C-91,Type I.

2. Cement Colouring: Cement used for exposed joints shall be mixed with approved

non-fading pigmented colour non-standing as approved by the Engineer.

b. Sand: Used in cement beds shall be clean, durable bank sand, free from silt, loam,

clay, soluble salts and/or vegetable matter, conforming to ASTM C-144 and graded

fine to coarse within the following limits 100% passing no. 8 sieve, 90% to 100%

passing no. 16 sieve, 60% to 90% passing no. 30 sieve, 25% to 55% passing no. 50

sieve and 0 to 15% passing no. 100 sieve.

c. Hydrated Lime : Shall be ASTM C-206, Type S or ASTM C-207, Type S.

d. Water: Shall be clear, clean, fresh and potable suitable for domestic consumption.

e. Mortar:

1. Shall consist of slaked lime putty or dry hydrated lime and cement and sand mixed

first and cement then added:

1 part cement.

2 parts lime or lime putty.

6 parts of fine crushed stone sand.

f. Admixtures: Plasticisers, subject to Engineer's approval.

g. Pointing Mortar Color: According to Local Standards. Color as selected and

approved by the Engineer.

h. Setting Mortar: According to Local Standards.

i. Add mortar color and admixtures in accordance with manufacturer's instructions.

Ensure uniformity of mix and coloration.

j. Do not use anti-freeze compounds to lower the freezing point of mortar.

k. If water is lost by evaporation, re-temper only within two hours of mixing.

44

l. Use mortar within two hours after mixing at temperatures of 26 C, or two and one

half hours at temperatures under 10 C.

2.3 Accessories

a. Anchors, Dowels, and Ties shall be steel, galvanized after fabrication to ASTM A

123, 380 g/m², of sizes and configurations required for support of stone and applicable

superimposed loads.

b. Bolts, Washers and Nuts: Galvanized steel.

c. Spacers: Inorganic.

d. Joint Filler: Closed cell foam.

e. Bond Breaker: Sheet 10 mil (0.25 mm) thick plastic.

F. Sealant: As specified, color to match stone color.

Part 3 - Execution

3.1 Requirements And Workmanship

a. All stone shall be installed, grouted, cleaned, protected and cured in accordance with

requirements as specified herein.

b. All materials shall conform to the requirements of applicable Specifications of the

American Society for testing Materials.

c. Work shall be commenced only after grounds, anchors, plugs, hangers and bucks

which are to be in or behind the stone work are installed. All surfaces shall be dry

and clean before setting beds are applied.

d. The stone setter shall co-operate fully with other trades to do all cutting, drilling and

fitting to accommodate work of others.

e. All cutting, drilling including cutouts to receive anchors, etc., shall be done accurately

on site.

f. Cutting at end conditions in the field regarding wall application of panels will be

permitted.

g. Stone Fabrication :

1. Fabrication Tolerances:

a. Maximum Variation from thickness : 3 mm.

b. Maximum Variation from face size : 2 mm.

c. Maximum Variation from flat : 2 mm/m².

45

2. Fabricate units for uniform coloration with adjacent units and over the full area of the

installation.

3. Veining pattern shall be in one direction (longest dimension of stone) except as

otherwise shown or directed. Stone shall be selected and cut with consideration to the

veining.

4. Form external corners to square joint profile.

5. Slope exposed top surfaces of stone and horizontal sill surfaces for natural wash.

6. Cut drip slot in work projecting more than 13mm over edges. Size slot not less than

10mm wide and 6mm deep, full width of projection.

3.2 Examination

a. Thoroughly examine all surfaces to receive work of this section, and notify Engineer

in writing of all conditions which would adversely affect this work. Do not

commence work in any area where such notice of adverse conditions has been sent to

the Engineer until corrective work has been completed or waived.

b. Starting of work in any area without issuance of such notice should constitute

acceptance of conditions in the area by this applicator who shall from that time be

responsible for the satisfactory results of his work and any defects occurring thereafter

shall be corrected without additional charge to the Owner.

c. Establish lines, levels, and coursing, protect from disturbance.

d. Verify that items built-in under other sections are properly located and sized.

e. Clean stone prior to erection. Do not use wire brushes or implements which will mark

or damage exposed surfaces.

3.3 Execution

a. Stone Facing to Wall:

1. General: Areas to receive stoneface shall be completed before commencement of any

stonework. Stonework for risers and all vertical application shall be same as

specified herein for walls.

2. Scratch Coat:

a. Apply one (1) part Portland cement, three (3) parts damp sand, 1/5 part lime by

volume. Prior to application saturate masonry evenly, do not leave surface

water. Apply to approximately 6 mm (1/4") thick, finish shall be cross scratched

ready to float coat.

b. Float Coat Mix: One (1) part Portland cement, three (3) parts damp sand, 1/5 part lime

by volume. Prior to applying the float coat the scratch coat shall be thoroughly cured.

Saturate the scratch coat evenly, do not leave surface water. Provided a plumb, true

mortar surface the proper thickness from finished wall line. Total thickness of float

46

coat shall be in accordance to details. Apply float coat over areas no greater than may

be covered with tile while the bed remains plastic. While bed is still plastic, set stone

as follows.

3. Setting : The float at walls and base shall be applied and rodded to a true and even

surface. Trowel or brush a thin layer, 2-3 mm in thickness, of neat Portland cement

paste over the back of stone. These areas (float coat and paste) shall be limited to

what can be covered with stone before the mortar sets. Stones that exhibit drying

along edges shall be soaked and drained. Allow no free moisture to remain on backs

of stone when being set.

4. Stone slabs shall be pressed firmly into the float coat bed, tamping with wood

blocks to obtain smooth surface. All tile shall be aligned properly with straight

closed joints .2 mm wide. All edges of stone shall be buttered with coloured

cement before closing joints, wipe off excess immediately with sponge and clear

water. Tamping shall be completed within one (1) hour after placing stone. Adjusting

stone out of line shall be done within the one (1) hour period.

b. Setting Standing Stonework:

1. Anchoring: Vertical stone facing shall be set with anchors attached to the stones by

being hooked and embedded in holes 1.9 cm (3/4") deep in the edges of the piece,

parallel to the face and equidistant from front and back faces. The hole shall be filled

with mortar mixed in proportions as specified herein before for wall installation.

Attachment to the back-up wall shall be done by inserting anchors into previously

drilled wedge-shaped holes and filled with same mortar mix.

2. Jointing:

a. All joints shall be closed joints, 6 mm (1/32") wide, edges of stone shall be scattered

with non-staining colored cement before closing joints, wipe off excess immediately

with sponge and clear water. (C. Arrange stone coursing to bond with a consistent

joint width of 6 mm.)

b. Arrange stone pattern to provide a consistent joint subject to Engineer's approval in

accordance to samples or mockups.

c. General:

1. After stonework has thoroughly set, sponge and wash thoroughly. Remove all surface

cement and take care not to damage stonework or adjacent materials. Do not use acid

or abrasive cleaners. Type of cleaner shall be approved by the Engineer prior to

application. Finally, clean all surfaces using soft, dry cloths. Cleaning shall be done

with cleaning solution as approved by the Engineer.

2. Protect work after final cleaning and approval of stonework with non-staining heavy

draft paper or other approved coverage until acceptance of the building. The

Contractor shall replace torn or worn papers after the stone setter has completed his

work.

3. Clean Up: Remove from the site and legally dispose of at the end of each day, all

cartons, rubbish and debris resulting from the work of this Section.

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3.4 Final Acceptance Of Work

a. Upon completion of the work, the Engineer will inspect the work accompanied by the

stone setter and General Contractor to point out all stone work in the judgment of the

Engineer needing filler including other conditions which are not acceptable for final

approval. All such work shall be properly logged as to its location and shall be

replaced and/or corrected in satisfactory condition acceptable to the Engineer. All

work shall be completed prior to final approval without additional cost to the Owner.

48

SECTION “E” METALWORKS

Division Titles Page No.

E - 1 Scope 26

E - 2 Materials 26

E - 3 Manufacture 27

E - 4 Workmanship 28

E - 5 Balustrades and Railing 29

49

SECTION E

M E T A L W O R K

E –1 SCOPE

These Specifications cover ferrous and non-ferrous works intended to be used in the Project

all in accordance with the Drawings and as directed by the Engineer.

E –2 MATERIALS

E -2.01 Steel

Steel plates, and structural steel shaped sections shall conform to the requirements of B.S. 4

latest edition for structural sections, Part 1 Hot rolled sections and Part 2 Hot-rolled hollow

sections (Metric Series).

E -2.02 Bolts and Nuts

Bolts and nuts shall conform to the requirements of B.S. 4190: I.S.O. metric black hexagon

bolts, screws and nuts.

E -2.03 Washers

Plain washers shall be made of steel. Taper or other specially shaped washers shall be made

of steel or malleable cast iron and shall conform to the requirements of B.S. 4230 Metal

washers for general engineering purposes.

E -2.04 Galvanized Steel Pipes

Galvanized steel pipes shall conform to the requirements of B.S. 1387 – I.S.O. “Medium

Series”.

E -2.05 Paint

Paint for Metalworker shall comply with the applicable requirements as specified under “

PAINTING”.

E -4.03 Hollow Metal Door Frames

Hollow metal door frames shall be fixed and shown on the drawings all in accordance with

the manufacturer‟s printed instructions and flushed up solid with plain concrete or cement

mortar.

The rates for hollow metal door frames are to include for the supply and assembly of the

complete unit including all necessary holes for hinges and lock, cutting off torsion threshold

bar if necessary and fixing in walls in accord- ance with the manufacturer‟s printed

instructions and plain concrete or mortar filling as shown on the drawings.

E 5 BALUSTRADES AND RAILING

Balustrades and railings shall be of the materials and made to the sizes, dimensions and

designs shown on the drawings.

50

SECTION “F”

SANITARY WORKS

Division Titles Page No.

F - 1 General 31

F - 2 P.V.C. Pipes 31

F - 3 Domestic Water Piping 32

F - 4 Manholes 34

F - 5 Clean out Boxes 34

F - 6 Clean out Openings 34

F - 7 Floor Drain 34

F - 8 Roof Drain 35

F - 9 Water Tanks 35

F - 10 Fixtures 35

51

S E C T I O N F

SANITARY INSTALLATIONS

F– 1 GENERAL

a. Scope of work

The Contractor shall furnish all labour, materials equipments, tools, appurtenances, services

and tem- porary work to provide complete the several pl; umbing and drainage systems all in

perfect working order.

This work shall include but not be limited to the following:

Sanitary fixtures.

- Water supply systems including cold water services.

- Soil, waste and ventilating systems.

- Rain water services.

- External gravity sewer net work.

Testing of all piping systems and equipment and other devices to demonstrate that the entire

installations are in perfect working order.

All fixtuires and materials shall be brand new bearing stamped ratings as required and must

be approved by the engineer prior to their use.

b. General description of the work

The sanitary works shall consist of all water supply to and water discharge from all the

sanitary fixtures.

City water is stored in steel water tanks at the roof of the building. Water distribution to all

floors is by gravity from these roof tanks.

Drainage of all floors is discharged by gravity from individual points to risers which are inter

connected to a system of manholes which will be later discharged to a local sewage treatment

plant.

Rain water is collected from roof and discharged out of the building by means of risers.

c. Working drawings and ordering

Immediately the contract has been awarded, the Contractor shall prepare detailed working

drawings showing exact position of all sanitary fixtures and position and size of all water

pipe work and drainage, soil, waste and vent piping, clearly indicated fittings proposed.

These drawings, when approved by the engineer, shall be used for ordering purposes.

F - 2. P.V.C PIPES

a. Supply and installation of 2”, 4”, & 6” P.V.C. pipes as manufactured by “Psalm” as shown

in drawings either within slab and wall or exposed and hung under ceiling.

b. P.V.C. pipes and fittings such as elbow, T, Trap shall be spigot and socket, and jointed by

rubber seal ring.

c. Clean out opening must be provided where shown on drawings and where required.

d. All riser branches must be provided by elbow or nipple with gate and with T with opening

at point of conic-tin with branches.

52

e. P.V.C. pipes and fittings shall be fixed in shaft by means of approved galvanized, two

pieces, holderbates of pipe fixed vertically and at not more than 2m. centers on pipes fixed

horizontally. Horizontal 4” and 6” P.V.C. pipe in pipe turned must be approved clamp.

f. Slope of drain pipes to be 1cm/mr unless noted otherwise.

g. Vent for sewage pipes to be 1 meter above finished roof and including wire dome grating.

h. Where vent pipes penetrate roof slabs, sleeve must be provided above it, and roof finishes

and water proofing, must be carried up around the pipe and covered with sleeves to prevent

water penetration, all to the approval of the Engineer.

i. For testing soil and waste stack the system shall be subjected to water test prior to being

covered and also tested for water tightness after back filling. On any section of pipe under

test the head of water applied shall not be less than 3 meter and not more than 6 meter. Test

shall be rectified and the test re-applied to the complete satisfaction of the Engineer.

F- 3 DOMESTIC WATER PIPING

a. Pipe Installation All piping shall be properly supported or suspended on

stands, clamps, hangers, etc.. of approved design.

Supports shall be designated to permit free expansion and contraction while minimizing

vibration. Pipes shall be anchored as directed by means of steel clamps securely fastened to

the pipe and rigidly attached to the building structure. Screw threads shall be cut clean and

true and joints made tight without caulking. No bushing shall be used. Reducing fittings shall

be used to change pipe size, and reductions to be made with eccentric reducers short

radius fittings shall not be used. The drawings indicate generally the size and location of

piping as designed for space conditional ceiling heights and may not be changed until

coordinated with other contractors.

Pipe work shall confirm fully of the following requirements Piping shall be properly graded

to secure easy circulations and prevent noise and water hammer. As much pitch as space

conditions allow must be given. Capped dirt pockets to be installed at all riser heel, low

points, and other places where dirt may accumulate must be provided.

Allowance must be made for proper provision for expansion and contraction in all portions of

pipe work to prevent undue strain in piping. Expansion joints to be installed as directed by

the Engineer.

All fittings such as elbows, tees, bushes, etc. shall be of best quality, foreign made or local

made [Class A] according to local standard with smooth interior surfaces.

Approved screw unions with bronze or steel bodies and ground brass taper or spherical joints

shall be installed at trapes instruments, etc. and where else directed to permit easy connection

and disconnection. Final connection to all equipment and fixtures shall be made in a manner

that will permit the complete removal of any fixture or any piece of equipment without

cutting of pipeline. If after the plant is in operation any system do not circulate quickly and

noiselessly [due to trapped or airbound connections]. The Contractor shall make proper

alternations in these defective connections. If connections are concealed in furring floors or

ceilings, the contractor shall bear all expenses of tearing up and rebuilding construction and

finish.

All main shall have a slope of not less than 5mm in 3 meters in direction of flow. All

branches shall have a slope of not less than 1mm in 3 meters towards the main.

53

All branches from mains shall be connected at the angle of 45 if possible. Each piece of pipe

and each fitting shall be carefully inspected on the inside to see that there is not defective

workmanship on the pipe or obstructions in the pipes or fittings. Joints in all screwed piping

shall be made with red load and boiled in seed oil, completely covered the male threads.

Straight elbows, bushing, long screws or bull head tees shall not be installed, and all offsets

shall be made with fittings. Pipes shall not be bend at any time.

Pipe work shall be installed in manner to allow for ease of air escape and system draining. It

shall be endeavoured to obtain this naturally by gravity.

However, where conditions don‟t permit it an automatic air vent shall be installed at all air

pocket locations and drain gate valves shall be supplied and installed at all low points and

risers legs or as shown on drawing. Before turning the project over to owner, contractor shall

thoroughly disinfect the entire water system, include underground main. Systems shall be

thoroughly flushed of all dirt and foreign matter.

Pipes material is galvanized steel “blue sign” local made “class A”.

All pipe fittings such as elbow, tee, reducer, union, etc. shall be galvanized forged steel of the

same quality of the pipe. Pipes and fittings shall be suitable for threaded connections.

b) Hangers, supports, anchors, etc.

The Contractor shall provide suitable and substantial hangers and supports for all piping.

Piping shall be carried by pipe hangers supported from concrete insets. In general supports

for pipes shall be not more than 2.5m, apart for 2” and smaller pipes according to the

conditions of the job and directions of the engineer. Copper piping shall have hanger every

1.5 meter. All vertical piping be supported by heavy pipe clamps resting on the building

structure. No piping shall be hung from other piping and all hangers shall be of heavy

construction suitable for the size of pipes supported. All horizontal pipes shall be supported

by split ring hangers of malleable iron, with sockets for hangers of solid rod the length of

each shall be adjustable. All vertical pipe line passing up through the building shall be hung

from each floor of the building. Malleable iron clamps of sample size bolted around the

pipes, shall be used for these supports. These pipes shall be secured midway between the

floor and the ceiling of each story by means of malleable iron, solid hangers around the pipe

and fastened to adjacent walls by means of inverted bolts cast in concrete walls anchors shall

be separate and independent from all hangers and supports. All anchors shall be of heavy

angle iron construction and suitable in every way for the work, and shall be installed where

necessary or as directed by the architect.

c) Valves

Hand valves and check valves shall be of an approved quality “KIM” or equivalent and shall

be furnished and installed as shown on the drawings or as directed during construction.

The Contractor shall include for the finishing the required valve tag and a schedule of valves

with a schematic drawing showing position of each. The drawing shall be glazed, framed and

hung in the machine room.

d) Float Valves

Supply and install all float valves as shown on the drawings and wherever specified in this

book of specifications.

54

Float valves shall be all bronze, screwed ends, float operated. Float shall be all copper and

mounted at the end of a brass or copper rod, which actuates valve operation.

e) Cleaning of Pipe

During constructions, the contractor shall cap all lines so as to prevent the entrance of sand,

dirt, etc. All pipe, fittings, valve etc. shall be cleaned of grease, dirt, scale and foreign

material before installation.

Before turning the project over to the owner all piping system shall be thoroughly cleaned

following the hereinafter specified instructions:

Piping shall be cleaned by operating system at normal operating pressure approximately 48

hours, wasting the condensate. At the end of the 48 hours period, contractor shall clean all

strainers by removing baskets and flushing with clean water. Blowing down through strainer

blow down valve will not be acceptable.

f) Testing

The piping system shall be tested by accepted method and under 150 psi hydrostatic pressure.

Test shall be maintained under inspection by consulting engineer for period of not less than 8

hours. No part of piping system shall be repeated after leaks are corrected. No part of piping

system shall be covered or concealed until it has been tested, inspected and approved by

engineer.

F-4 M A N H O L E S

a. All manholes shall be built from concrete or solid brick laid on 10cm. Concrete base over a

15cm. Hard-core , dimensions and level of inverts of manhole are shown on drawings.

b. Work shall include excavation, back filling, concrete base, hard-core installation,

reinforced concrete cover slab, benching and rendering internally.

c. Benching of manholes to be semi circular of diameter equivalent to adjacent pipes and to

be rendered and plastered perfectly smooth, inclination in manhole to be 2cm minimum.

d. Manholes over 1 meter deep shall be supplied by Cast iron steps well anchored to the

concrete walls at a spacing of 30cms

e. Manholes exceeding 2 meters deep shall be reinforced concrete base and walls cast in place

as shown in drawings.

f. Drop manholes exceeding 2 meters to be also of reinforced concrete base above.

F-5 CLEAN - OUT BOXES

Clear – out boxes shall be approved quality P.V.C. 4”/2”. They shall be provided with air

tight, sealing cover of chrome plated bronze.

F-6 CLEAN - OUT OPENINGS

a. Clean out opening is exposed P.V.C. soil and waste pipes shall be provided where shown

on drawings and where required.

b. All elbows for under ceiling piping connection shall be provided with gates.

F-7 FLOOR DRAIN

Floor drain shall be obtained from an approved manufac- turer P.V.C. 4”/2” minimum water

seal complete with chrome plated duty strainer tightly sealed to drain body. All 2” P.V.C.

drain pipes are connected to floor trap by rubber sealed record fittings.

55

F-8 ROOF DRAIN

Each roof drain shall be of P.V.C. pipe constructed with no trap, having and integral flange

and wire Dome type strainer, fixed by screwing into the drain body. Rain drain shall be

installed as shown on drawings.

F-9 WATER TANKS

Tanks shall be constructed of anti-corrosive steel sheet of 0.08mm thickness. The work shall

include installation on steel bases and also connection of galvanized pipes from the main

public pipe with a water meter, valves and installation of diaphram ball valve. Also the

supply pipe from the tanks includes a vent pipe. A test will be made against any leakage or

defect and according to the approval of the Engineer.

F-10 PLUMBING FIXTURES

Contractor shall supply and install the plumbing fixtures. All fixtures shall be set true and

level. All necessary supports for fixtures shall be installed before plaster work. All exposed

connections and fittings shall be of chromium plated brass. All nipples through wall to fixture

connections shall be copper with compression connections.

F-10 PLUMBING FIXTURES [CONDT'D]

No water supply shall be less than 1/2”.

a. Supply and installation of wash basin, porcelain local made class “A” size 56x41, with

chrome plated cold water faucet, size ½” of approved manufacturer such as [Grohhe or

equivalent] including chrome P-trap same kind of faucet connected with over flow and with

the floor trap by plastic P.V.C. pipe 2” and with chain and rubber plug. Height of basin 80

cm. From floor.

b. Supply and install of porcelain W.C. bowel including internal SSiphon local made class

“A” or equivalent. The price includes plastic flushing tank, plastic W.C. seat cover of heavy

duty such as [Keter], chrome plated angle valve ½” chrome plated flexible hose ½” . The

W.C.‟s connected with the 4 inch P.V.C. main sewage pipes, connecting the flushing tank to

main cold water line by ½” galvanized pipe . W.C. bowels shall be fixed to floor-by cadmium

screws and tightly grouted.

c. Supply and installation of best quality class “A” Porcelain laundry sink of size

60x39x36cm with chrome plated cold water faucet size ½” of approved manufacture such as

[Grohhe or equivalent] including 2” plastic P-trap connected with the floor by P.V.C. pipe 2”,

and with chain and rubber plug. The price includes connection to cold water mainline by ½”

galvanized steel pipe. Height of sinks 60 cm from floor.

d. Supply and installation of stainless steel kitchen single sink size 100x56cm including the

supply of chrome plated cold water faucet of approved quality [Grohhe or equivalent]

connected to cold water mainline by ½” galvanized steel pipe and connected to floor drain

trap by 2” P.V.C. pipe.

56

SECTION F: PLASTER WORK

G 3.01 Mixing of Ingredients

Except where hand mixing of small batches is approved by the Engineer, mechanical mixers

of an approved type shall be used for the mixing of plaster.

Frozen, caked or lumped materials shall not be used.

Mechanical mixers, mixing boxes and tools shall be cleaned after the mixing of each batch

and kept free of plaster from previous mixes. Plaster shall be thoroughly mixed with the

proper amount of water until uniform in colour and consistency. Retempering will not be

permitted and all plaster which has begun to stiffen shall be discharged.

All plastering shall be executed in a neat wormanslike manner and internal and external

angles shall be true, straight and plumb. Plaster shall be made good adjacent to wood or metal

frames, skirting and around pipes or other fittings.

All tools, implements, vessels and surfaces shall at all times be kept scrupulously clean and

strict precautions shall be taken to avoid the plaster or other materials becoming

contaminated by pieces of partically set material which would tend to retard or accelerate the

setting time.

G 3.02 Preparation of Surfaces

All surfaces to be plastered shall be clean and free from dust, grease, loose or projecting

mortar and all traces of salts are to be thoroughly sprayed with water, but all free water shall

be allowed to dry and disappear from the surface before the plaster is applied.

Plastering shall not be commenced until the background has been suitably prepared.

Blockwork joints shall be deeply raked out, efflorescence brushed off and all dust and foreign

matter removed.

Before plastering is commenced all junctions between differing materials shall be reinforced.

This shall apply where wall join columns and beams, particularly where flush, and similar

situations where cracks are likely to develop and as directed by the Engineer. The

reinforcement shall consist of strip of galvanized wire mesh (10 to 15mm hexagonal mesh)

15cm wide which shall be plugged, nailed or stapled as required at intervals of not exceeding

45cm at both edges.

On all external surfaces and on all smooth internal surfaces spatter dash of cement and sand

which shall contain 500 kgs of cement per one meter cube of sand shall be applied and

allowed to dry before rendering is commenced. All surfaces of walls shall be wetted

immediately prior to applying the first coat of rendering and this shall be allowed to

thoroughly dry out before the next coat is applied.

The Contractor shall from vertical guide screeds 5cm wide. The spacing shall not exceed 1.50

meters.

The screeds shall be plumb and in the same plane with each other. The sides of the screed

shall be kept rough to bond with plaster, the surface shall be smooth.

The finished surface shall be true to shape and angle oven in all directions, with straight

arises free of cracks and trowel marks and to the entire satisfaction of the Engineer.

G 3.03 Application of Coats

a) Base-Coat (Rendering)

57

After the application of the spatterdash “rasheh” the base coat shall be applied after the

spatterdash coat has set but in no case earlier than 24 hours after the application of the

spatterdash coat.

When applied to masonry or to concrete surfaces the base coat shall be applied with sufficient

force to prevent air pockets and to secure a good bond.

The base coat shall be lightly scratched in both directions to provide a key for the finishing

coat and shall be kept moist with a fog spray for 2 days and then allowed to dry out.

b) Finishing Coat

Shall not be applied until the rendering or base coat has seasoned for seven days; just before

the appli- cation of the finish coat, the rendering or base coat shall be wetted evenly with a

fog spray. Where cement plaster with a smooth trowelled finish is specified or indicated on

the drawings, the finish coat shall be first floated to a true even surface, then trowelled in a

manner that will force the sand particles down into the plaster and with the final trowelling,

leave the surface finished smooth and free from rough areas, trowel marks, checks or other

blemishes.

G 3.04 Proportions for Internal and External Plaster

Internal and external plaster shall be composed of 400kg of cement per one cubic meter of

salt free sand.

Plastering shall be applied in two (2) coats unless otherwise specified or indicated on the

drawings.

Finishing coat shall have a resonably uniform thickness of approximately 5mm.

Screed shall be laid and ruled as necessary to allow for a total thickness of 15mm for external

and internal plaster and the rendering shall be applied to the required thickness.

The metal grid system shall be a patent system suitable for use with in-situ plaster and

expanded metal lathing and shall have, flat metal hangers to suit suspended ceilings depths as

shown on the drawings and described in the Bills of Quantities. The system shall include all

main and cross runners, necessary splicers, hangers, clips and wall mounting next to walls.

The system shall be installed complete in accordance with the manufacturer‟s instructions.

The metal grid suspension system shall be concealed and shall allow for the whole of the

ceiling to be demountable.

All concealed ferrous metal members such as channel runners, zbars, clips and splines shall

have an approved corrosive resistant finish.

G 3.05 Metal Lath

At all junctions of dissimilar materials (i.e. concrete and blockwork or steel elements) the

joint shall be covered by metal lath strips not less than 200mm in width securely fixed to the

surface.

G 4 WATERPROOFING PLASTER TO ALL EXTERNAL WALLS

Mixing of plaster ingredients and preparation of surfaces to be plastered with waterproofing

plaster shall be as specified above.

Rendering coat shall contain 450kg. Of Ordinary Portland Cement per cubic meter of clean

coarse salt free sand and with admixture of waterproofing compound as specified added in

accordance with the printed instructions of the manufacturer, shall be applied and the surfaces

shall be trowelled hard smooth and allowed to dry. All surfaces of plastered areas shall be

cured for a minimum of 7 days.

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G 5 TYROLEAN PLASTER (FINE GRAIN)

G 5.01 General

The tyrolean plaster shall be executed to the extent shown on the Drawings and as directed by

the Engineer.

The contractor shall provide sample (s) of Tyrolean plaster for the approval of the Engineer

prior to commencement of Tyrolean work.

G 5.02 Mixing

Cement and aggregate for each batch shall be accurately measured and mixed dry until

evenly distributed and the mass is uniform in colour. All batches shall be of such size that

they can be entirely used within half an hour. Mechanical mixers of an approved type shall be

used for mixing tyrolean plaster, except when hand mixing of small batches is specifically

approved by the Engineer. Mechanical mixers, mixing boxes and tools shall be cleaned after

mixing each batch and kept free of tyrolean mortar from previous mixes. Water content shall

be maintained at a minimum. Mixing shall be continued until plasticity be maintained at a

minimum. Mixing shall be continued until plasticity is obtained.

G 5.03 Proportions

Proportions of materials for tyrolean, by volume shall be as follows:

a) Scratch Coat

1 part Ordinary Portland Cement

3 parts fine aggregate

b) Finish Coat

1 part of white Portland cement

3 parts fine selected aggregate

No lime shall be allowed in either scratch or finishing coat, scratch coat shall be set on

spatterdash.

G 5.04 Application of Tyrolean

a) Workmanship

Surfaces to receive tyrolean shall be clean, free from dust, dirt, oil, or other particles that

might interfere with a satisfactory bond. Surfaces to receive tyrolean shall be evenly

dampened (not soaked) with a fog spray before tyrolean is applied. If surfaces become dry in

spots, the dry areas shall be dampened again to restore uniform suction. Tyrolean coats shall

be applied continuously in one general di- rection without allowing mortar to dry at edges.

Edges to be jointed shall be dampened slightly to produce a smooth confluence. Tyrolean

unless otherwise shown or specified shall be two coats work not less than 20mm. thick (i.e.

spatterdash, crotch coat and one tyrolean coat).

All exterior corners of tyrolean shall be slightly rounded.

Tyrolean on soffit surfaces shall be pitched forward to form a drip.

b) Scratch Coat

Shall be approximately 14mm. thick and shall be applied under sufficient pressure to form

good keys and shall be brought to a plumb true even surface. The scratch coat shall be damp-

cured 48 hours before the finish coat is applied under sufficient pressure to form good keys

and shall be brought to a plumb, true even surface. The scratch coat shall be damp-cured 48

hours before the finish coat is applied.

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c) Finish Coat

Shall be approximately 6mm, thick. Surfaces of the scratch coat shall be dampened several

hours before the finish coat is to be applied. Additional dampening at time of application

shall be by fogspraying. Dampening by brush will not be permitted. When measure with a

2meter long, straight- edge applied in all directions the finish surface shall not vary from a

true plane by more than 1.5mm. The finishing coat shall be applied by means of a proper

spraying machine and the degree of the finishing coat shall be determined by the Engineer.

G 6 BEDS AND BACKINGS

Cement and sand beds and bedding under floor finishings and backing behind wall and

column finishings shall be cement and sand (1:3) mix by volume unless otherwise specified.

G 7 CEMENT SCREED TO CHANNELS

Cement screed shall, unless otherwise ordered by the Engineer, consist of one part of

Ordinary Portland Cement to four parts of sand by volume. Ingredients shall be proportioned

and mixed specified under concrete work and laid to falls with smooth trowelled finish as

shown on the Drawings.

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SECTION - J

ELECTRICAL WORKS

Division Titles Page No.

J – 1 General Requirements 60

J - 2 Miscellaneous Work 63

J – 3 General Condition of the Different

Parts of Installations 65

SECTION J

ELECTRICAL WORKS

Electrical contractors are invited to quote for the supply of all labour and materials required

for the completion of part of all the electrical installation.

J-1 GENERAL REQUIREMENT:-

1- Prerequisite Conditions:-

All applicable sections of the general Specifications are included by reference to the work

required by this division of the specifications.

2- Extend of Work:-

a- The work shall include all necessary labour, materials, plant services machinery and

appliances and at the Contractor‟s own risk and expense, to deliver construct and in- stall

complete in good working condition the electrical installation in accordance with the

drawings, specifications and bills of quantities. All materials and wormanship shall, except

where otherwise directed, comply with the requirements and regulations of the appropriate

local Electrical Authority, and I.E.E. and shall be subject to the approval of the Electrical

Engineer.

b- Work shall also include: -

1 The procurement of and payment for all permits and licenses required for the performance

of the work.

2 All hoits, scaffolds, staging, runways and equipment required for the performance of the

work.

3 All job measurements and shop layouts required for the proper installation of material and

equipment included in the work.

4 All lights, guards and signs as required by safety regulations applicable to the work.

5 The removal from the premises, as it accumulates, of all dirt and refuse resulting from the

performance of the work.

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6 All equipment under this heading shall be installed under competent supervisory service

finished by this Contractor and where necessary this shall include the services of special

erection and operation engineers.

3 - Miscellaneous Conditions:-

a. All installed material and equipment shall be new, shall be of the best quality and design,

and shall be free from defects and imperfections.

b. All labour for the installation and adjustment of material and equipment shall be done by

experienced mechanics of the proper trade and all workmanship shall be first class.

c. Installed material and equipment included in the work shall be protected from dirt and

damage and maintained in a clean condition during the performance of the work.

d. Apparatus, equipment and material required for the performance of the work shall be

stored under requirements of applicable regulations and of direction from the Architect.

e. This Contractor shall cooperate with all other Contractors on the project, be responsible for

prompt delivery of all materials and equipments and for the installation of all works under

this division at a time and in a manner so that there will be no delay in the construction

schedule.

f. Acceptance of the work shall be subject to the condition that all installed systems,

equipment, apparatus and appliances included in the work shall operate and perform as

designed and as selected with respect to efficiency capacity and quietness and shall operate

and perform without producing objectionable noise within occupied areas of the building.

g. Acceptance of the work shall be subject to the conditions that any time within one year

after date of final approval, any defective part of the work resulting from the supply of faulty

workmanship or material shall be immediately amended, repaired or replaced as a part of the

contract work without cost to the owner.

4 - POWER SUPPLY: -

The system of distribution will be fed from a 230/400 volts 3- phase, 4 wire 50 Hz, system.

5 - SYSTEM OF DISTRIBUTION

The system of distribution to be used for lighting and power is to be the radial type, including

branch circuits and ring circuits system where shown in drawings.

6 - DRAWINGS AND SPECIFICATIONS

a All electrical drawings are intended to cover the layout and design of the work, but are not

to be scaled for exact measurements. Where special detail and dimensions are not shown on

the drawings, this Contractor shall take measurements and make electrical layouts as required

for the proper installation of electrical work so that interference with all other work will be

avoided.

b All drawings and specifications on the project are complementary, each set to all other sets,

and they shall be used in combination for the execution of this work.

Electrical work shown on any set drawings, including all architectural drawings for general

work and equipment, and electrical work called for under any section of the project

specifications, shall be considered as included in this work unless specifically excluded by

inclusion in some other branch of the work. This shall include roughing in for fixtures and

equipment as called for or inferred.

This Contractor shall check all drawings and specifications for the project and shall be

responsible for the installation of all electrical work.

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7 - INSPECTION OF SITE

Contractor of this work shall inspect the Site, study existing conditions, check with the

drawings and specification and be fully informed as to the work required the Contract.

8 - OPERATION AND MAINTENANCE INSTRUCTIONS: -

a This Contractor shall furnish all services as required for adequate verbal and printed

instructions to the Owner‟s operating and maintenance personnel for operation and

maintenance of all equipment and systems installed under this heading. Two complete copies

of a service manual in hard back binders shall be furnished at the end of the project and shall

include printed operating and maintenance instructions for systems specified under this

heading, all approved shop drawings and all manufacturer‟s printed instructions for

equipment operation and maintenance.

b- When the work is complete and at a time designed by the Owner, the Contractor shall

furnish the services of a qualified instructor to instruct the Owner‟s personnel in the operation

and maintenance the systems and equipment.

9 - RECORD DRAWINGS: -

a Contractor shall be required to keep a day to day record of changes in location of all

equipment, conduit, and devices on one or more sets of contract drawings, underground

utilities, use to be dimensioned from building walls, foundations or other readily indentifiable

feature.

b The Contractor shall record such changes in red ink on black line prints, the record prints

shall be submitted to the Architect for approval prior to final payment.

10- CUTTING AND PATCHING: -

Any cutting of new construction which is required for the installation of electrical work after

the construction of walls and floor slabs, shall be done by this Contractor. Cutting shall be

done with extreme care so that the strength of the structure will not be endangered. Adequate

protection shall be provided to prevent damage to adjacent areas. Patching and finishing of

opening shall be the responsibility of the Electrical Contractor.

11- EXISTING EQUIPMENT: -

a All existing equipment that indicated to be removed shall remain the property of the Owner

if he so desires. Such equipment shall be removed by the Contractor and delivered to a point

on the project site as designated by the Owner.

Any equipment that the Owner does not desire to retain shall be promptly removed from the

Site by this Contractor.

b Any existing equipment or material that is to remain in service and is damaged by the

Contractor during the course of the Contract, shall be repaired and refinished or replaced to

the satisfaction of the Owner, at his discretion.

12- CONDUCT OF WORK: -

All work under this Contract which may interference with the Owner‟s Operation shall be

done in such a manner and at such time as may be satisfactory to the Owner. Make temporary

alternations and connections as required to execute work so that all services in the building

are maintained with the minimum possible interruption. Temporary shutdowns shall be

segregated and shall be of the shortest possible duration. All services shall be kept on

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continuous operation unless permissions are otherwise granted by the Owner. All temporary

wiring shall be the responsibility of the Contractor at no additional cost of the Owner.

13- OMISSIONS

If anything necessary to the proper installation or operation of the electric system is omitted

from the drawings or specifications, or bill of quantities, or indicated incorrectly, the

Contractor shall call the attention of the electrical Engineer to these omissions or inaccuracy

immediately before work proceeds. Should the Contractor shall fall to do so, he shall be

helder responsible and shall make good at his own expense such errors or any damage

caused.

14- SAMPLES:-

Single samples of the following shall be submitted to Electrical Engineer by the Contractor

before the work commences. Section of conduit, section of wire and cable, junction boxes,

switches and plates, outlet box isolating switches, lamp holders, ceiling roses distribution

boxes, circuits breakers, earth leakage relay and any fixtures supplied by the Contractor and

other materials to be incorporated in the installation, the work done by the Contractor shall

not vary in any manner from the samples submitted and approved without written permission

from the electrical engineer.

` 15- LAYOUT: -

Before the Contractor commences the installation he shall discuss the exact timing and the

whole layout in detail with the Engineer, in order to determinate the exact position of

distribution boards, fittings and accessories, and the runs of cable and conduits unless

instructions are given after the relevant section of the work is completed.

16- DRAWINGS: -

The design of the accompanied drawings and the quantities in the attached schedules are not

definite and are subject to any variations made by the Electrical Engineer during

constructions.

No variations or amendments in the drawings and the specifications shall be made to the

Contractor except as directed in writing by the Electrical Engineer who has the right to refuse

all the materials and works which are not, in line with the drawings and specifications.

17- TESTING:-

The Contractor shall make or cause to be made at his own expense and in the presence of the

electrical engineer tests for perfect operation for installation ,insulation resis- tance and earth

continuity,

18- Tenderers:-

for this work have the previous experience in this field of work and an official license of

three phase installation from the Electric Company–Jerusalem District.

19 - The Contractor should provide on his own expense and all risks insurance policy for his

workers during all the period of his work.

20- The Contractor or his representatives should be on the Site or work daily for taking any

instructions from the director of works.

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21- The Owner reserves, the right to accept any tender, either as regards the whole of the

work indicated therein, or as regards any one or, more parts so included. The Owner does not

bind himself to accept the lowest of any Tender.

J – 2 MISCELLANEOUS WORK:

1 - EQUIPMENT INDETIFICATION AND LABELS

a All electrical equipment, such as disconnect switches, motor starters, controls, pushbuttons,

panelboards, and other similar items shall be adequately identified with labels. Labels shall

clearly designate name and use of equipment. Labels shall be made with embossed plastic

tape except where engraved plates are called for elsewhere in the specification or on the

drawings.

2 - GROUNDING: -

a- Grounding shall be in accordance with the local Electrical Authority requirements and

regulations, and with the I.E.E. regulations.

b- All branch circuit conduit wiring shall include an insulated copper wire for grounding of

all non-current carrying conductive surfaces of electrical equipment subject to person contact,

and for every electrical outlet.

c- Earth Electrode must be provided. This to consist of 3 driven copper rods 1,5 meter long of

standard type, and must be installed as near as possible to the main board.

The earth wire has to be copper conductor as specified making loop connection between the

rods and the earth (ground) bus bar, the distance between each rod and the other have to be at

least 7 meters with a checking man hall at least 60cm depth.

d- Other similar P.V.C. copper conductor has to be bonded to the main water supply pipe

from the earth bus bar.

The impedance shall be less than 5 Ohm

3 - ADJUSTING, ALIGNING AND TESTING:-

a - All-electrical equipment furnished under this heading and all electrical equipment

furnished by others shall be adjusted and tested by this Contractor.

b Mechanism of all electrical equipment shall be checked for alignment with drive and

adjusted as required. Protective devices and parts shall be checked and tested for specified

and required application and adjusted as required. Adjustable parts of all lighting fixtures and

electrical equipment shall be checked, tested and adjusted as required to produce the intended

performance.

c Complete wiring system shall be free from short circuits and after completion the

Contractor shall perform tests for insulation resistance in accordance with the requirements of

the I.E.E.

d The Contractor shall be held responsible for the operation, service and maintenance of all

new electrical equipment, furnished by him, during construction and prior to acceptance by

the Owner of the complete project under this Contract. All electrical equipment shall be

maintained in the best operating condition including proper Lubrication. Operational failure

caused by defective material and/or labour covered under other headings or furnished by

others.

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4 - MOTOR AND OTHER CONTROL EQUIPMENT

a This Contract shall install and mount miscellaneous disconnect switches and motor controls

furnished by other Contractors in accordance with their instructions, wiring diagrams and

approved shop drawings, but he shall be responsible for the operation of such devices only to

the extend of proper mounting and wiring. Work shall include mountings and supports as

required for all equipments including angle frames, steel plates, bars, bolts, etc.

This Contract shall furnish and install all conduit, wire, etc., as required to connect all

equipment furnished by him and other Contractors including motors, dis-connect switches,

starters, controls, pushbuttons, etc.

b This Contractor shall perform all work required to rough in and connect to all equipment

required electrical connections, except equipment that is furnished by the Owner which shall

be roughed in only. This work shall be as indicated on drawings, by approved equipment

shop drawings and by direction on the job.

c The Electrical Contractor shall run feeders to control and motors as shown on drawings,

make connections and install and wire all mechanical components, except temperature

control, in accordance with wiring diagrams furnished by Mechanical Contractor. The

Electrical Contractor shall coordinate with other traders involved for the proper coil voltages

for control of magnetic starters and contractors.

5 - OPENING AND SETTING OF CONDUIT:-

a Work shall include the direction for other work as required to provide openings for the

admittance into the building of material and equipment included in the work.

Work shall include all cutting required for the installation of material and equipment included

in the work.

b Any cutting and/or patching of new construction which is required for the installation of

Electrical work after new walls and floors have been constructed shall be the responsibility of

the Electrical Contractor if the cutting and patching is due to errors or omissions on the part

of the Electrical Contractors.

6 - EXCAVATION AND BACKFILLING:

a This Contractor shall excavate as required for the installation of all underground work

under this heading. Surplus material not needed for backfilling shall be deposited or

distributed on the premises as directed.

Trenches shall be of sufficient width and shall be cribbed or braced to prevent cave-in or

settlement. Trenches close to walls and columns shall not be excavated without prior

consultation with the Architect or his representative.

Pumping equipment shall be furnished to keep trenches free of water. Dry earth shall be

rammed into place at sides of conduits, leaving joints and top of conduits exposed until

approved. After approval, all trenches for work installed by the Contractor shall be backfilled

by him in 15cm layers of well-tamped dry earth in a manner to prevent future settlement.

Rocks debris, bricks, and like material shall not be used for backfill. Where direct burial

cable is installed the trenches shall have 5cm of medium sand installed in bottom of trench

and put over the sand.

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b Any trenches improperly backfilled or where settlement occurs, shall be reopened to a

depth required for the proper compaction, then refilled and compacted with the surface

restored to the required grade.

c As a part of this Contract, all roads, streets, and sidewalks damaged by the installation of

building services or other work under this heading shall be repaired to the satisfaction of the

authorities and regulations having jurisdiction.

J - 3 GENERAL CONDITION OF THE DIFFERENT PARTS OF INSTALLATIONS

1 - CONDUITS

a Conduit shall be installed for all wires and cables except where otherwise stated or directed

. The conduits shall be P.V.C. pipe of the thinner type (Merikaf) or similar under plaster.

b of a fireproof plastic type should be used whenever exposed installations are used. And it

shall Conduits be securely fastened in place with approved straps.

c Steel conduit should be used in the boiler, and wherelse directed by the Electrical Engineer.

d No conduits used should have an internal diameter less that 13mm. The Conductors area

within the conduit should not exceed 50% of the area of the conduit. .

e The conduit has to be away from heat mechanical pressure.

f The contractor shall be responsible for ensuring that the conduits are so laid that water

cannot infiltrate or accumulate at any point.

g The Contractor shall be responsible to ensure that placing of the conduit is done prior to

pouring of concrete without delaying the concrete work.

h In conduit installation the Contractor should make all his effort to run all the pipes in

horizontal or vertical lines and not inclined and to be at the same level from the floor in all

rooms.

i The conduits should have at least cover of 2cm of plaster or concrete.

j Separateconduits have to be used for separate sys-tems of different voltage.

k Conduits between any two connection boxes have to be of one piece with no connection in

the pipes.

l Where finish wall surfaces are to be plastered, the Electrical Contractor shall cooperate with

the General Contractor during construction of these walls and use care in the installation of

all conduits and boxes so that wall surfaces will have a finished appearance

m Conduit shall be installed to requirements of structure and to requirements of all other

work on the project.

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Conduit shall be installed to clear all openings, depressions, pipes, ducts, reinforcing steel,

etc., and conduit set in forms for concrete structure shall be installed in a manner that

installation will not affect the strength of the structure.

n All electrical work shall be protected against damage during construction and any work

damaged or moved out of line after roughing-in shall be repaired and reset to the approval of

the Electrical Engineer, without additional cost to the owner.

o - All conduits have to be approved by local standard.

2 - PULL BOXES AND CONNECTION BOXES

a The contractor has to make his best to use the minimum number of these boxes.

b All boxes should be of the same material as that of the conduits.

c Boxes should be wide enough to contain easily all connections of cables.

d Pull boxes and connection boxes should be installed all at the same level from ceiling.

e - All boxes should be covered.

f Installed connectors should be used in all the connections inside the boxes.

g Cables of different voltage should not be drawn or connected in the same connection box.

3 - OUTLET BOXES

a Suitable outlet boxes shall be installed for all electrical service outlets, including plug

receptacles. Lighting fixtures, switches.

b Location of outlets on drawings is approximate and, except where dimensions are shown,

exact location of outlets shall be taken from plans and details on general drawings or as

directed by the Architect. Outlets shall be located generally from column centers and finished

wall lin4s or to center of acoustical and decorative ceiling panels and to centers or joints of

wall panels.

c Outlets shall be installed in an accessible location.

4 - SWITCHES

a Outlet boxes for switches are to be fixed 140cm above finished floor level and 12cm

horizontally from the outside edge of the nearest door.

b Switches should be of 10 amp. With different signs for emergency switches if used.

c Switches should be of waterproof type DIG or equivalent for the bathrooms and where

otherelse shown.

d All switches should be all-installed rockers flush of Tadiran kind or equivalent.

e - Switches shall be wired in the phase lines only.

f - The neutral conductors shall not be broken.

g Switches panels shall have a similar assembly to switches and it should be group-mounted

in a common box if possible, and if it is without pilot tamp. Otherwise it has to be group

mounted in aluminium or stainless steel cover to the approval of the Engineer.

5 - SOCKETS

a Boxes for sockets outlets are to be installed 60cm or, as shown in the drawings above

finished floor level.

b Socket should be of 13 amp. For the power socket with different color for socket and non-

emergency.

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c - Sockets should be of Tadiran kind or equivalent type.

d Sockets in the boiler room should be industrial heavy duty.

e Sockets in the bathrooms and where Therese shown shall be waterproof type DIG or

equivalent.

f All sockets shall be wired in the same manner with the phase always connected to the same

pole [rightpole].

6 - WIRES, WIRING

a All wires and cables, except where otherwise stated are to have a soft copper core, refined

and tinned, with an electric conductivity of not less than 98% the core shall be insulated with

rubber with braid for 600 volley service.

b Samples, of cabling and wiring proposed the contractor, are to be submitted prior to

commencement of the work.

These must comply with the requirements of the I.E.E., and local standard to ensure a

constant voltage in every part of the building.

c All wires are to be standard. [for lighting and power, the neutral wire shall be different in

color from the phase wires].

d All wires shall be run on conduit and shall be continuous between outlets and boxes. At

least 20cm of wire be left at outlets for fixture connections.

e Where wire size is shown on drawings, or specified, it shall be the same size throughout the

circuit.

f Wiring inside panel boards shall be neat and well arranged, using appropriate lugs for

termination and connection of conductors.

g Joints in the cables or wires are not allowed to be made inside conduits.

h Wires are to be fixed to boards with an appliance ensuring perfect electrical contact, to the

approval of the Electrical Engineer.

i In drawing wires through conduits, no lubricant is permitted.

j Cable shoes have to be used for wires of 6 sq. mm. or above.

k All boxes and distribution boards have to be carefully cleaned from plaster and other

foreign material before drawing any electric wires or cables.

l - Colours of the cables should be as follows:

a. Single phase circuits :

Brown for the phase

Black for the neutral

Green & Yellow or White for the earth

Blue for direct [switch

Wires].

b. 3 Phase circuits :

Brown, Yellow & Blue for the threephase.

Black for the neutral

Green & Yellow or white for the earth

m - Cables

a All the cables should be of the following type N.Y.Y. 5 or 4 cores, 11000 volt, plain

annealed high conductivity copper wire conductors P.V.C. sheathed.

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Under Ground cables should be of type NYBY.

b Colours of cores in the cable should be red, yellow, blue & black. Colours of the sheathes

shall be black.

c Cables terminations should be through brass cable glands. Glands should be complete with

brass earth tags and steel locknuts.

d Cable connection at both ends should be through cable shoes.

e Cables should be covered with soft sand, concrete slabs and special warning in 3 languages.

n - Wire Size

a - Sizes of wires are shown in the drawings

b The size of the earth cable for any circuit should be the same size as that of the phase or as

shown on the drawings.

c The size of the wire for the bells, loud speakers and sound outlets should not be less than

0.6sq.mm.

d - Size of wire for Fir Alarm should be at least 1.5 sq. mm.

7 - ELECTRICAL BOARDS

1 a- All boards should be manufactured by a qualified factory who has a wide experience in

this field.

b The tenderer should supply with his tender complete drawings for each board which shows

the electrical and mechanical design of the boards with dimensions.

c Therefore, the contractor gets the approval of the engineer before he commences with the

manu-facturing of these boards.

d Electrical boards should be erected complete with all conduits terminated to it before

installation of any cable in the conduit.

2 - B O D Y

a Electrical boards and panels shall be ready made otherwise it should be manufactured from

2mm steel sheet with all angles and channels needed for supporting and mounting the

equipment, and it should be full finished steel with electrostatic painting. Colour should be

beige.

b All screws. Nuts and washers should be galvanized.

c Boards to be designed with removable front plates for easy access to the interior for cabling

up and maintenance.

d A special compartment with separate cover shall be made for terminals, neutral and earth

bars.

e - All panel boards shall be with doors.

f All doors which have equipment mounted on them shall be shielded from inside with

isolation sheets.

g Distribution Boards in wet areas should be of waterproof type.

h All electrical boards shall have spare space of at least 25% of their area.

3 - BUS - BARS

â All bus bars shall be of hard drawn electrolytic copper.

b Bus bars shall be supported by suitable bus bar insulator to protect the bars from any

electrical, mechanical and dynamic stresses.

c - Bus bars shall be rated at a max. of 2 amps/sq. mm.

4 - NEUTRAL AND EARTH BARS

Suitable bars for neutral and earth shall be mounted on the top compartment of each board,

for terminating the outgoing circuits on them.

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A bolt with suitable size shall be welded on the body of each board for earthing.

5 - L A B E L S

All circuits shall be labelled in English language. Labels shall be of the black sandwich type

and engraved.

6- MAIN C.B.S

These C.Bs shall be air insulated, adjustable, with magnetic and thermal protection, and have

a min. rupturing capacity of 25 K.A.

These C.Bs shall be of the best quality and preferably of the Simmons or NZM-type made

K.L.M. in Germany or equivalent.

7 - MINIATURE C.BS, AUTOMATIC CHANGE OVER SWITCH,[MECHANICAL

INTERLOCK] AND E.L.Rs.

These M.C.Bs shall be of the air insulated type with magnetic and thermal protection and

fixed adjustment, the main rupturing capacity if these M.C.Bs, shall not be less than /5 K.A.

The M.C.Bsm type N and E.L.R. shall be of the best quality and preferably Simmons or

K.L.M. made or equivalent. All E.L.R. shall be 4-pole with 0,03 amp. Sensitivity.

8 - ON - OFF SWITCHES

All these switches shall be hand operated, air insulated and able to withstand any load and

fault conditions. These switches shall be Siemens type N. or K.L.M. made or equivalent.

9 - INSTRUMENTS

All the measuring shall be very accurate which have dimensions of 120x100 mm. and

mounted on the boards.

All amperemeters shall be with selector switches to measure the voltage between phases and

between phases and the neutral.

10- CONNECTORS

All outgoing shall be terminated on connectors mounted on the compartment of the boards.

Connectors must have a copper strip between the wire and the screws. All connectors shall

have special paper fixed on them for writing the names of the circuits.

Connectors shall be of or best quality.

11 - T E L E P H O N E S

a 1” conduit should be installed from each telephone box to the telephone box in the floor

where shown in drawing with galvanized wire installed within for the telephone company.

b The telephone box should be 1 meter high from floor level.

c Main conduits from the floor boxes and the operator have to be shown in drawings with a

galvanized wire.

d Telephones cables for the main boxes and the telephone outlet should be drawn with the

presence of the telephone department.