6. Tech Spec Civil

7/25/2019 6. Tech Spec Civil

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TECHNICAL SPECIFICATIONS

For

Construction of Weir, Intake, Trash rack structures, Water conductor System, Fore!ay,

Anchor !"ocks for Penstock, Po#er house $S#itch yard %Ci&i" #ork', Tai"race channe", and

A""ied #orks etc(

)enera" Instructions*

These specifcations deal with the technical considerations in generalinvolved in the implementation o the project and will orm part o thetender documents and contract. The specifcations mentioned hereunderare common and equally applicable or similar items o work where-ever inthe schedule and the same shall be ollowed, unless other wise specifed. The work shall be carried out with these specifcations, constructiondrawings and any other authorized deviations issued rom time to timeapart rom the specifcations shown here under. ll the materials requiredor the work shall be provided by the contractor unless otherwisespecifed.



TA+LE OF CONTENTS

( C"earin- site

.( Care and di&ersion durin- construction

/( E0ca&ation

1( Fina" foundation 2re2aration and c"eanin-

3( Pro&idin- Anchor +ars

4( Cement concrete #orks

i ggregatesii !ementiii "ateriv #atching and mi$ing

v !onveyingvi %orms or concretevii &emoval o %ormsviii 'lacing o concretei$ !ontraction (oints$ )teel or reinorcement

5( 6u!!"e $+rick masonry*

7( Water su22"y and sanitary arran-ements

8( Stee" 6o""in- Shutter9( A"uminium doors, #indo#s, &enti"ators, hand

rai"s and 2artitions

(F"oorin-

.(Fi"" and !ack:""

/(Paintin- meta" #orks

1( Water 2roof cement 2aint3(Su22"y, fa!rication and erection of stee" ; meta"

#orks

4( Insta""in- machinery, e<ui2ment and meta"

#orks

5()routin-



The !ontractor shall be responsible or the maintenance o thediversion works, and any damages to the works and equipment due to theailure or partial ailure o the diversion works shall be borne by thecontractor and the diversion works repaired and rectifed at his owne$pense to the satisaction o the !ompanys /ngineer in charge. The!ontractor shall be responsible or and shall repair or compensate at his

e$pense any damage caused by the ailure o any part o the diversionworks.

ter having served their purpose, all temporary bulk head,temporary protective works, co0er dams, etc shall be removed by the!ontractor.

=easurement and Payment

1o separate payment will be made or the item mentionedabove. 'rice or the schedule items and the quoted rates shall be inclusiveo the cost on account o the above item.

/( E0ca&ation*

)enera"*

The e$cavation is to be carried out in any type o soil, rock 2soil mi$ed with boulders. The spoil thus obtained shall be disposed o0 atplaces pointed out by the !ompanys /ngineer in charge.

The e$cavation shall be open cut e$cavation. ll precautionarymeasures shall be taken to prevent slips in e$cavation area. n the evento any slip occurred, the slipped materials shall be removed by the!ontractor.

#eore any work or e$cavation are taken up, all loose rock,semi detached rock in or close to the area to be e$cavated, which areliable to all or otherwise pose danger to workmen, shall be removed.

C"assi:cation

To acilitate measurement and payment, the materialencountered during e$cavation shall be measured by level measurementat site and shall be classifed only as ollows.

3 456 !ommon e$cavation7 !ommon e$cavation in all class o soil at allelevation shall include all overburden, dry or wet earth, silt, sti0 clay,shale, moorum, laterite, lime stone, sand stone, sand, gravel, looseboulders not e$ceeding 3.8m9 each in volume.5 4:6 &ock e$cavation7 /$cavation in hard rock or rock boulders o sizemore than 3.8m9 in volume by blasting using e$plosives by open

controlled and protected blasting.:



9 496 /$cavation in rock;concrete by chiselling, barring or wedging atlocations where such e$cavation is specifcally ordered by the !ompanys/ngineer in charge.

+"astin-

ll the precautionary measures shall be taken by the!ontractor beore blasting so as to prevent any loss or damage topersons, property in the work area and its vicinity during blasting. Thedamages i any caused by blasting shall be repaired ;compensated by the!ontractor. The !ontractor shall be solely responsible or injury to anyperson;loss o lie, or damage to any property and or any accidentsresulting rom blasting in connection with the works and also or all theclaims resulting there rom.

The !ontractor shall provide su<cient protective work coverover the blasting area so as to avoid +ying o any rock ragments whichmay cause danger to the lie;property in the vicinity.

?se, Stora-e and Hand"in- of E02"osi&es

The !ontractor shall posses all the necessary licenses requiredrom the !ontroller o /$plosives in connection with the procurement,storage, conveyance and use o e$plosives.

The !ontractor shall make himsel ully acquainted with =ovt.o ndia /$plosives ct and &ules and amendments to said act and all the

operations in connection with blasting should be done in accordance withthe ct;&ules.

'roper warning signals by sirens or bugles at least 9 minutesshall be given beore each operation o blasting.

=easurement and 2ayment

mmediately ater award o contract, level measurement haveto be taken in the presence o companys authorized representative andtake fnal level so that the quantity can be fnalised as per the approved

drawings.

ll e$cavations in earth and removal o boulders up to 3.8m9volume will be measured in solid rom level measurements and paid orunder the item in the schedule under >common e$cavation in all classes o soil?@

)uitable material rom the spoil is to be used in the backfll and otherconstruction purposes, ree o cost ater approval by the engineer incharge. Asable rubble or construction purpose shall be selected and

permitted to use by the contractor ree o cost.



/$cavation o rock will be measured in level measurements insolid and paid or under the respective items in the schedule.

The rates or e$cavation o respective items in the scheduleshall include cost o removal, handling and the disposal o all e$cavatedmaterials wet or dry. The rates shall urther include cost o e$plosives,

drilling, charging, tamping, blasting, dewatering, encing, protection, andall other operations and incidental works necessary or the e$ecution o works. The rates or e$cavations at all elevations shall include all lits andleads and shall include all contingent and temporary works such asshoring or timbering necessary to maintain the e$cavation in good orderduring construction and removing such temporary works when notrequired. The rates in the schedule shall include the entire cost o transporting the materials directly or indirectly rom the e$cavation to thepoints o the fnal disposal including temporary stock piling and re-handling, i required.

The payment will be made at the agreed rate or the relevantitems in the accepted schedule.

1( Fina" foundation 2re2aration and c"eanin-

)enera"

The fnal preparation o oundation in rock, suraces shall bedone just beore construction o masonry or placing o concrete is takenup. #eore commencing masonry construction or placing o concrete, all

loosened and drumming rock and loose materials and particles includingthe very fnest o chips, sand, dirt, flms o oil and grease etc. shall beremoved and surace cleaned. The whole surace particularly everycorner, crevices and joint shall be thoroughly cleaned o all clinging dirt.


The payment or this item will be made or area measuremento the surace prepared at the agreed rates.

O&er e0ca&ation

1o payment shall be made or over e$cavation done beyond thelines and levels specifed in approved drawings.

3( Pro&idin- Anchor +ars

*rilling holes or anchor bars have to be done as per the drawings or asdirected by the /ngineer in-charge. The diameter o the drill holesshall be not less than 5.8 times the diameter o the anchor barspecifed or that hole.



P"acin- anchor !ars and -routin-

The anchor bars or dowel rods shall be cleaned thoroughlybeore being placed. ll water shall be removed rom the hole beore thegrout is placed. The anchor bars shall be orced into place beore the grout

or mortar has taken its initial set and shall be vibrated, i practicable, untilthe entire surace o the embedded portions o the bars is in intimatecontact with the grouts. )pecial care shall be taken to ensure againstmovement o the bars, which have been placed. nchor bars shall beplaced B: hours in advance o masonry constructions;concrete operationssuch that it is set in position. nchor bars ound loose ater setting shall bereplaced by the e$pense o the !ontractor.


4i6 Ceasurement or payment or providing anchor barsincluding drilling holes or anchor bars and grouting the bars in position willbe based on the actual number o holes including cost o bars, bearingplates, nuts, etc. placed irrespective o the depth and size o holes drilledand bars placed and grouted in position, at the agreed rate in the accepted)chedule.

4( Cement concrete #orks*

)enera"

ll concrete, its constituents, methods and procedures o manuacture shall conorm to the latest editions o ndian standardspecifcation.

Com2osition

The design o each concrete mi$ will be made by the!ompanys /ngineer in charge in accordance with the requirements o strength, durability, workability, and impermeability etc. or the variousstructures as per these specifcations.

@ua"ity contro"

The !ontractor shall arrange or quality control tests asdeemed necessary and all tests shall be conducted in the presence o thecompanys representative. ll sampling and testing will be in accordancewith the applicable provisions o the latest editions o ndian standardspecifcations. The !ontractor shall ensure that the samples tested shallsatisy the acceptance criteria as per ndian )tandards.

Coarse A--re-ates*



The coarse aggregate or the purpose o these specifcation designatesaggregate o size larger than D.B8mm up to the ma$imum size o aggregate specifed. The aggregates shall be ree rom all dust andwashed to ensure that all aces o the broken stones are perectly clean.ggregates shall comply with the requirements as per ndian standards.

Fine a--re-ate %Natura" sand or Processed sand'

The fne aggregate, whether it is river sand, crushed sand, ora mi$ture o both in proportions, shall comprise o all aggregate particles,as per the relevant specifcation in the ), having a ma$imum size up toD.B8mm.

Cement

!ement or the work shall be procured, transported andsupplied by contractor and shall conorm to the relevant #..)specifcations.

Water

"ater or mi$ing concrete shall be clean and ree rom oils,acids, alkalies, organic matter, salts or other impurities. The !ontractorshall make his own arrangements or pumping water required or washingaggregates, mi$ing concrete, curing etc. and shall provide pumps, pipelines etc. required or this purpose at his own cost.

+atchin- and mi0in-

The !ontractor shall use batching plant and mi$ers or concretemi$ing. "eigh batchers should be used in conjunction with mi$ers so thatthe approved mi$ strengths are maintained Ci$ing o concrete and mortarusing concrete mi$ers shall be governed by the ollowing specifcations.

4i6 The mi$ing shall be done in-standard approved type o mi$ers o suitable capacity. the mi$ing and charging operations aresuch that the required uniormity o the concrete is obtained in a shorter

mi$ing time than the minimum specifed without sacrifce o neededworkability the mi$ing time may be shortened, but only with the priorapproval o the !ompanys /ngineer in charge.

The !ontractor may visit the site and acquainthimsel with the probable location o batching plant etc. beore quotingrates. The location o construction plants shall be chosen so that it shall notobstruct the works or hinder the access to the work areas.

Con&eyin-



The concrete shall be placed beore initial setting has occurred. The methods and equipment used or transporting and placing concreteshall be such as will permit the delivery o concrete o the requiredconsistency into the work with out objectionable segregations, porosity ande$cessive loss o slump. The slump loss rom mi$er to the orms shall notbe more than :8 mm. There shall be no vertical drop greater than 5.8 m

e$cept where suitable equipment is provided to prevent segregation.!ontractor shall at his cost make his own arrangements to convey theconcrete to di0erent locations.

Forms for concrete

%orms to confne the concrete and shape it to the required linesshall be procured by the !ontractor at his cost and used wherevernecessary. The orms shall have su<cient strength and rigidity to hold theconcrete and withstand the necessary pressure, ramming and vibration

without any de+ection rom the prescribed lines. ll e$posed concretesurace having slope o 5 to 5 or steeper, shall be ormed by using ormworkunless otherwise directed.

#eore placing concrete, the surace o all orms shall be oiledwith a suitable non-staining oil so as to prevent sticking o concrete andacilitate removal o orms. %or use on wood orms, the oil should becapable o penetrating the wood, or remain su<ciently oily to eliminatesticking and o preventing absorption o water and consequent warping.

6emo&a" of forms

The orms shall be removed only when the removal isauthorised by the !ompanys /ngineer in charge. The duration o time orwhich the orms shall remain in place will be decided by the /ngineer incharge with reerence to weather conditions, shape and position o structureor structural member and the amount o dead and live load coming uponthe structure and the strength gained by the concrete.

P"acin- of concrete

)enera"

1o concrete shall be placed e$cept in the presence o dulyauthorised representative o the !ompany. 1o concrete shall be placed untilerection o all orm works, installation o parts to be embedded andpreparation o surace upon or against which concrete is to be placed havebeen approved by the !ompanys /ngineer in charge.

'roperly placed concrete shall be ree rom segregation and themortar shall intimately be in contact with the coarse aggregate,reinorcement and other embedded parts. !oncrete shall be placed in

horizontal layers e$cept wherever decided by the /ngineer in charge."here such procedure is impracticable, concrete shall be worked readilyinto corners and angles o the orms and around all reinorcement and



embedded items, i any, without permitting the material to segregate.#eore placing concrete, it shall be made certain that transporting andplacing equipment are clean and in proper working condition and that theequipment along with the operating orce is su<cient and properly arrangedto deliver the concrete in its fnal position. *epths o layers or massconcrete are generally 9E to F3 cm. and or structural concrete 93 to 83

cm., or as decided by the /ngineer in charge. 'recaution shall be taken toavoid entrapment o air within partially enclosed spaces to be flled withconcrete. n placing concrete at surace o construction joints whereadequate vibration is impracticable, the concrete shall be worked by hand+oating or other e0ective means to ensure thorough compaction o concreteat the surace o joints. )uch hand working may be necessary at thinheavily reinorced wall particularly where the joint is sloping. "hen slabsand beams o the supporting walls and columns are cast monolithically, theconcrete in the top F3 or G3 cm. o the walls and columns shall be o thelowest slump that can be vibrated adequately and shall be ullyconsolidated at the surace. #eore placing this concrete in top fllets, slabsand beams, the concrete in the walls and columns shall be allowed to set aslong as possible allowing it to become so hard that a running vibrator willnot penetrate o its own weight. ter placing the fllet, beam and slabconcrete, the vibrator shall penetrate and revibrate the concrete in the topso wall and column concrete. the slump o designed concrete is su<cientto enable good consolidation in the orms by ample vibration, it is theresponsibility o the !ontractor to provide handling and placing equipment,which will put such concrete into orms ready or the action o the vibrator. The !ontractor shall see that the buckets, chutes, hoppers and otherequipment used or handling concrete will readily handle and place concrete

containing aggregate o the ma$imum practicable size within the specifedsize range. s the weathering and disintegration o concrete are moresevere at the tops o walls, piers and parapets and in kerbs, sills, ledges,copings, e$posed corners and in those portions in intermittent contact withwater, all available means o improving the durability o such concrete shallbe employed during construction including those shown below unlessotherwise directed by the /ngineer in charge.

Hower the slump to the minimum that can be vibrated well inthe critically e$posed portions. t this low slump, which will rarely need to

be more than :8 mm, the usual amount o / will have to be increased toobtain the required percentage o air entrainment.

&educe the water-cement ratio by weight. dditional cementrequired shall be substituted or sand in the regular mi$. There shall be noincrease in the unit water content. /ssentially these changes will result in anew mi$ having close to 8 or F percent air, a :8 mm. slump, and a watercement ratio o 3.D8 or the critically e$posed parts o the work.

n placing concrete in walls, kerbs and slabs, work rom the

corners and ends o the orms towards the centre, rather than towards thecorners and ends thus avoiding accumulation o mortar and wetter concretein those parts o structures where e$posure is more severe.



!oncrete placing shall be continued without anyinterruptions until the placement is completed or until satisactoryconstruction joints can be made. !oncrete shall not be deposited asterthan the consolidation crew can properly consolidate it. The !ontractorIsunit rate quoted shall include the cost o all the above works including

treatment o cold joints or laying resh concrete. The cost o mortar used intreating cold joints shall also be borne by the !ontractor.

The !oncreting o the 'ower ouse and ancillary structuresshall be carried out in stages closely linked with the erection o generatingequipments and accessories satisying the requirements o embedding,encasing, supporting etc., o the various installations.

'lacement o concrete, embedding, encasing, supporting etc. o the equipment and installation to lines and levels and according to details

shown in the construction drawings. Jarious holes, ducts and block outsshall be let in the +oors and walls while concreting as shown in thedrawings or as directed. 1o concreting shall be commenced untilinstallation o parts to be embedded in the particular location is completed. The concreting shall be done taking due care not to disturb and causedamage to installed parts, piping, cables etc.

Construction oints

I!onstruction jointsI are the contacts between newly placedconcrete and concrete suraces upon or against which concrete is to be

placed and to which new concrete is to adhere and that have become sorigid that in the opinion o the !ompanys /ngineer in charge the newconcrete cannot be incorporated integrally with the concrete previouslyplaced. !onstruction joints shall be roughened and cleaned thoroughly bychipping o all laitanceK loose or deective surace concrete and oreignmaterial by means approved by the /ngineer in charge and shall be coveredby a layer o mortar o the same mi$ beore the new concrete is laid.

E02ansion oints/$pansion joint shall be provided wherever required as shown in

the drawings. ll the materials shall conorm to relevant .). specifcations.

Bi!ration of concrete

!oncrete shall be placed with the aid o mechanical vibratingequipment and supplemented by hand spading and tamping. The durationo vibration shall be limited to that necessary to produce satisactoryconsolidation without causing objectionable segregation in consolidatingeach layer o concrete. The vibrating head shall be allowed to penetrate andre-vibrate the concrete in the upper portion o the underlying layer. %reshlayers o concrete shall not be placed until the layers previously placed have

been worked thoroughly as specifed. The disturbance o reinorcementembedded in concrete beginning to set or already set shall be avoided.



Concretin- durin- rains

The concreting work shall be generally discontinued during therains e$cept where su<cient protection rom rain is provided and approvedby the /ngineer in charge.

Curin- and 2rotection

ll concrete shall be suitably protected rom injury until fnalacceptance giving particular care to all permanently e$posed corners andedges. The e$posed fnished suraces o concrete shall be protected romthe direct rays o the sun or at least B: hours ater placement.

"ater curing shall be used on all concrete and shall be appliedby spraying, ponding or by covering with damp cloth maintained in a moistcondition. %orms shall be kept sprinkled with water until removal. /arlydrying shall be prevented. !oncrete shall be kept moist at least or :5 days. The unormed top suraces o ormed concrete such as tops o wallsK piersand beams etc. shall be moistened by wet burlap or other e0ective meansas soon as the concrete is hardened su<ciently to prevent damage. Thesesuraces and steeply sloping or vertical ormed suraces shall be keptcompletely and continuously moist prior to and during orm removal byapplying water to the top suraces and allowing it to run down between theorms and the concrete. The water used or curing shall be ree rome$cessive amount o silt, colouring matter or impurities, which may stain thefnished works. 1o fre or e$cessive heat shall be permitted near or in directcontact to the concrete at any time. The construction joint shall be cured in

the same manner as other concrete and shall also be kept moist or at leastB: hours prior to placing additional concrete upon joints. damp sand orwet quilts or mats are used or curing it shall be removed completely later./$posed concrete that has not been continuously cured or :5 days shall betreated as unft to be retained in the structure and shall be removed at thee$pense o the !ontractor.

Concrete 6e2airs

The contractor shall correct all the imperections in the concretesurace as necessary to produce surace that conorm to the requirements

o fnishes as decided necessary by the companys engineer in charge. Thecost o all materials including cement, labour and equipments used in therepair o concrete done beore fnal acceptance o work shall be borne bythe !ontractor.


'ayment or concrete items will be based on the agreed ratesand volume computed up to the e$cavation payment line specifed when

the concrete is placed against e$cavated suraces or according to the neatlines o the concrete sections when it is not in contact with the e$cavationsas shown in the drawings or as described in the specifcations or )chedule.



1o allowance will be made in the measurement neither or the concretechipped and removed, nor or chipping in oundation rock beore placing o concrete. The method o measurement o concrete work will generally be inaccordance with the relevant ndian )tandard )pecifcations.

Pre2aration of "ift surfaces or co"d oints

The lit suraces and cold joints surace o concrete shall beprepared by green cutting;hydro blasting;mechanical roughening or wetsand blasting, to obtain a clean and proper surace or the placement o resh concrete. =reen cutting consists o cutting the surace o the reshconcrete with a high velocity air water jet to e$pose a clean surace o sound concrete. The operation shall be perormed ater the concrete hassti0ened but beore it has become too hard or e0ective cutting. Theprepared suraces shall be kept clean till resh concrete is placed. The costo preparing lit suraces and cold joints and the cost o aggregates andother materials wasted during surace preparation shall be deemed to beincluded in the rate agreed to in the accepted schedule or various itemsin concrete.

Contraction oints

Jertical transverse contraction joints are provided in the weiror convenience in construction and to provide or the contraction o theconcrete. The location o those joints is as shown in the drawings or asdirected. ll the contraction joints shall be constructed in accordance with

the details shown unless otherwise specifcally directed. The joints shalle$tend through the ull cross section o the weir profle and shall bestarted rom the oundation. The joints shall be sealed, on the upstreamend by installing one line o 'J! sealing strips and another line o 'J!water stop running or the ull height o the weir rom the oundation rockto the top o weir as shown in the drawings or as specifed by the /ngineerin charge and an asphalt seal in between. The asphalt seal shall beprovided with a steam heating system. :33 mm dia. trap drain to beormed in between asphalt seal hole and 'J! water stop is to be suitablytaken to the oundation drain.

'J! water stops will be required to be placed at contraction joints as shown in the drawings or as specifed by the /ngineer in charge.

Fi0in- PBC sea"in- stri2s for contraction oints

The contraction joint seals o the type shown on the drawingsshall be provided in the weir and the appurtenant works. !ontraction

joints in the weir and appurtenant structure shall be constructed inaccordance with the details shown on the drawings or as directed by the



/ngineer in charge. The contractor shall urnish all the materials andlabour required or the work.

*etails o the shape and the placing o the sealing strips areshown on the drawings or as directed. The sealing strips shall be jointedcareully together by bracing or welding, so as to orm continuous

watertight diaphragms in the joints. dequate provision shall be made tosupport and protect the sealing strips during the progress o the work. The!ontractor shall replace or repair any metal sealing strips that may bepunctured or damaged beore fnal acceptance o the work.

Fi0in- PBC #ater sto2s

'J! water stops shall have width and cross sectionalconfguration as shown on the drawings or an equally e0ective crosssectional confguration. The !ontractor shall urnish all 'J! water stopsand all fttings and splice materials or making feld connections.

Insta""ation The !ontractor shall provide suitable support and protection

during the progress o the work to protest the 'J! water stops romdamage, deterioration or warping. The 'J! water stops shall be installedwith appro$imately equal widths embedded in the concrete on each sideo the joint. The concrete shall be careully placed and vibrated around thewater stops to ensure complete flling o the orms in the areas around the

water stops, and a complete bond between the concrete and allembedded areas o the water stops.

+itumen;as2ha"t sea"

=ateria"s

4i6 The asphalt seal slot provided between the sealing strips shallbe flled with -grade asphalt or blown bitumen asphalt & E8;:8 or itsapproved equivalent acceptable to the /ngineer in charge.

4ii6 )team heating quality pipes o 5: mm dia supplied by the!ontractor shall be f$ed in the asphalt seal slots to allow properconsolidations when flling the hole and reconsolidation subsequently aterperiodic inspection i required by the /ngineer in charge.

Fi!re Ty2e oints

pre-moulded bituminous e$pansion joint material 53 mm to:3 mm thickness shall be urnished by the !ontractor and placed in

contraction and e$pansion joints when directed. The joint fller materialshall be non- e$truding bituminous fbre type in accordance with theapplicable standard specifcations.




PVC water stops

Ceasurement or payments or urnishing and installing 'J!water stops will be made on the basis o linear meters o 'J! water stopsin place measured along the centreline o water stops.

Asphalt seal

'ayment or urnishing and placing asphalt sealing will bemade at the agreed unit rate or asphalt actually placed in the weir orwhich unit rate shall include all cost o all materials, labourers, fnal steamheating and other contingencies.

ll materials, labourers etc. required or incidentals ororming contraction joints such as plugging o asphalt seal slots, anchorsetc shall be borne by the !ontractor and the rate agreed or relevant itemshall be inclusive o these costs.

Steam pipes

'ayment or urnishing and f$ing 5:mm steam heatingpipe in the asphalt seals will be made at the unit price per kg o steampipes fttings and specials actually installed in the weir at the unit rateagreed in schedule which unit price shall include cost o all labour,materials, other e$penses and contingencies including charges orkeeping the steam pipes rom clogging or blocking and charges orurnishing and f$ing supports or steam heating pipes in asphalt seal slotsand testing.

Plugging of asphalt seal slots at top

The asphalt steel slots shall be plugged at top with cast ironplugs. 'ayment or plugging asphalt seal slots as shown in the drawingsand as directed by the /ngineer in charge will be made at the unit priceaccepted in schedule or urnishing and installing miscellaneous metalworks etc., which unit price shall include cost o all materials, labour and

incidentals required to complete the work as per specifcations.

Stee" for reinforcement

)enera"

C.). &ods;ribbed tor steel reinorcement shall be provided and placedin position as indicated in the drawings or as directed by the !ompanys

/ngineer in charge wherever required.



)teel rods etc., required as reinorcement or the works, will beprocured, transported and supplied by contractor and shall conorm to therelevant #..) specifcations.

@ua"ity Ribbed Tor steel

The tor steel required or the works shall be supplied by the

!ontractor. The specifcations or placing Tor steel shall conorm toapplicable ndian )tandards. #ending o bars shall conorm to .)7:83:.

P"acin- of 6einforcement

&einorcement bars shall be accurately placed and tied inposition so that they will not be displaced during the placing o the !oncreteand special care shall be e$ercised to prevent any disturbance o thereinorcement bars in concrete that has already been laid. Cetal chairs,metal hangers, metal spacers or other material supports satisactory to the/ngineer in charge shall be urnished and used by the !ontractor orsupporting the reinorcement bars wherever necessary in the opinion o the/ngineer in charge to prevent uture damage to the concrete or unsightlyrust stains on e$posed concrete surace.


Ceasurement o steel reinorcement shall be made or theweight o steel actually placed in quintal as per design drawings and asdirected by the !ompanys /ngineer in charge. 'ayment will not be madeor steel used in sti0ening and strutting orm work. #ut laps orreinorcement will be measured and paid or. 'ayment or placing and f$ingreinorcement in position will be made at the unit rate ;quintal in theschedule which unit rate shall include urnishing and tying with the bindingwire ties i used, hauling and storing, cutting, bending, cleaning, placing andsecuring and maintaining in position all reinorcement bars. 'rocurement o steel in bulk will be verifed and paid as per the purchase bill.

5( =asonry Work(

6u!!"e $ +rick =asonry

&ubble masonry shall consist o granite rubble thoroughlyembedded in cement mortar. ll rubble shall be well cleaned and wettedbeore being laid.

The bricks used or the work shall be frst class country burnt bricks andshall be sound, hard and well burnt with uniorm size, shape and colour



4generally deep red or copper red6 homogeneous in te$ture and ree rom+aws and cracks.

Cortar shall consist o cement and sand mi$ed in proportion,one parts o cement with fve parts o sand by volume or other proportionas directed by the !ompanys /ngineer in charge.

=easurement and Payment*

The masonry work in cement mortar will be measured andpaid on the basis o volume o work under each item completed at theagreed rates.

7( Water su22"y and sanitary arran-ements

The water supply and sanitary arrangements shall be made asspecifed in the drawings. ll 'J! pipes used or water supply, sanitaryarrangement and drainage, 'J! bends and fttings shall comply with therelevant .) specifcations


'ayment will be made based on the original bill produced bythe contractor and at the agreed rates under relevant items in theaccepted schedule.

8( Stee" 6o""in- Shutter

)enera"

&olling shutter shall be electrically operated. The rollingshutter shall be o approved manuacture, suitable or f$ing in thepositions ordered, by the /ngineer in charge. ll the material and itsfttings, motor, cover etc should confrm .). specifcation.


!lear width between side jambs and clear height between+oor and bottom o lintel;beam i.e. the area, which shall be covered by therolling shutters, shall be measured.

9( A"uminium doors, #indo#s, &enti"ators and2artitions

)enera" This shall be obtained rom approved and establishedmanuacturer and shall be o aluminium alloy conorming to )7 B99 and



)ections shall generally conorm to ) )pecifcation. The doors andpartitions shall be ully glazed.


!lear area over one ace inclusive o e$posed rames shall be

measured and payment will be made at the agreed rate or the concerneditem in the accepted schedule.

( F"oorin-

)enera"

=ranite +ooring is recommended or some selected area o powerhouse and the balance portion with cement concrete C:3-C):3

mi$ed with +oor hardener L8kg;m: o approved quality. The work has to

be fnished smoothly.


The payment or the +ooring shall be or the fnished area. Theagreed rate in the schedule or this item shall include cost o hardener,cost o mortar, cost o C:3-C):3 concrete cost o labour or fnishing,including cost o all materials and all other incidentals.

.( Ceramic ti"es :nishin-*

)enera"

The ceramic tiles or the work shall be o frst class quality ando approved colour and pattern. The tiles are to be set over a bed o cement mortar 579, 58mm thick. 1o e$tra payment will be made or themortar. )amples o tiles should be got approved beore laying tiles. Thepattern o arrangement o tiles should also be put up or approval.


The payment or tile +ooring shall be made or the area overwhich the fnishing is done at agreed rates in the accepted schedule .Theagreed rate in the schedule or this item shall include cost o tiles, cost o base mortar or pointing, cost o labour or base plastering, placing tiles,pointing and all other incidentals, e$cluding cost o cement.

/( Acid Proof Ti"e Pa&in-*

)enera"



%or the #attery room, acid proo vitrifed tiles arerecommended. They shall be o uniorm thickness and shall not be lessthan 5: mm thick. The pattern o arrangements shall be got approved bythe /ngineer in charge. These shall be laid over a base coat o cementmortar 579, 58 mm. thick and neatly pointed. The surace shall be smoothlyand neatly fnished.


The payment or tile fnishing shall be made or the area overwhich the fnishing is done at agreed rates in the accepted schedule .Theagreed rate in the acceptable schedule or this item shall include cost o tiles, cost o base mortar or pointing, cost o labour or base plastering,placing tiles, pointing and all other incidentals.

1( Fi"" and !ack :""

)enera"

The work to be done under this section comprises o ormingembankments slopes terraces etc, and fling or backflling oundation andat other locations.


1o separate payment will be made or the item or un-

compacted earth fll. 'rices or the schedule items are inclusive o the coston account o this.

Ceasurement or payment o compacted earth fll will bemade on cubic meter content o material placed between the lines andgrades and indicated in the drawings as per the specifcation and asdirected by the !ompanys /ngineer in !harge.

3( Paintin- surface and meta" #orks

)enera"

The !ontractor shall clean suraces and apply paint andprotective coatings as hereinater provided and shall urnish all materialse$cept otherwise provided. )uraces, which are not required to be paintedor coated, but are adjacent to suraces to be cleaned and painted shall beprotected against contamination and damage during the cleaning andpainting operations. #eore proceeding with the painting or coatingoperations, the !ontractor shall clean and repair all shop applied paint,which is deective or damaged. Caterials, which are to be painted shall be

handled with care and protected as necessary to preserve the coating ingood condition. Temporary or permanent welding will not be permitted onareas where the welding will damage paint or other protective coatings



unless the areas o coating, which would be damaged thereby, areaccessible or repairing and inspection. Anless otherwise specifed, the!ontractor shall not disassemble machinery, equipment or other metal workor the purpose o painting the interiors.


'ayment will be made on area basis at agreed rates or therelevant item in the accepted schedule. The agreed rate in the acceptedschedule or this item shall be inclusive o cost o labour and materialsrequired or cleaning, preparing suraces, painting or coating and incidentalsrequired or completing it.

The rate or the item Murnishing and installing miscellaneousmetal works such as hatch cover, grating, grills, chequered plates etc. isinclusive o cost o painting. 1o payment will be made or painting suchmiscellaneous metal works.

4( Su22"y fa!rication and erection of stee" ; meta"#orks

Fa!rication and Erection of 6oof -irders, )antry -irders

)enera"

The contractor shall abricate and supply roo trusses, gantrygirder, and secondary girders or roo. !ontractor shall transport abricatedroo trusses, gantry girders and secondary girders rom his abrication shopto 'ower ouse site and shall be stored under protection rom weather andhandled structures properly. The roo girders and gantry girders shall bepainted with one coat o zinc rich primer. The !ontractor shall erect roo trusses, gantry girder and secondary girders in position to lines and level asper the approved drawings. The erection shall be done with the help o allnecessary plant and equipment careully. %ield connections should be doneonly ater checking o setting out and alignment and as per relevant )specifcations. The straightening, cutting, drilling, assembling, riveting,bolting, welding clearances etc. shall also be as per the relevant )specifcations.


'ayment will be made as per weight measurement at agreedrates in the accepted schedule or the relevant item. The agreed rate shallbe inclusive o cost o steel plates, abrication, supply, transportation o abricated structures, charges or storing and handling at site, erection

position at site, cost o painting Ninc rich primmer coat and all theincidentals required or erection.



=eta" handrai"s

)enera"

Cetal handrails wherever required as shown in the drawings oras directed by the /ngineer in charge shall be urnished and installed by the

!ontractor. =alvanised ron pipe handrails supported over steel tubeverticals, are proposed.


'ayment will be made or the weight o hand rail assemblyinstalled. The quoted rate shall include cost o all materials, labour, fttings,including screws washers, specials etc. The unit o measurement will beOuintals

=isce""aneous meta" #orks

)enera"

This includes gratings, platorms and supports and covers ormanholes, chequered plates, gutters, drains, and all other +oor openings,metal ladders and ladder rungs, metal supports or hand rails, structuralsteel rames and kerbs to be embedded in concrete at the edges o hatchways, manholes, sumps, and other +oor openings and connected embeddedparts and f$tures, all the above items including similar minor miscellaneousitems o metal work shall be urnished and installed by the !ontractor as

shown in the drawings or as directed by the /ngineer in charge.


'ayment will be made at agreed rates or the weightmeasurement o actual installation done. The unit o measurement will bequintal. The agreed rate in the accepted schedule shall include the cost o all steel items, conveyance, specials abrication charge, installation charge,cost o painting, all incidentals.

5( )routin-

)enera"

The general plan or grouting the oundation rock under theweir provides or preliminary low pressure shallow grouting to be ollowedby fnal high pressure deep grouting.


)rout ho"es*



*rilling will be measured or payment up to the actual deptho drilling. /$cept as other wise provided, payment or drilling grout holeswill be made at the applicable rates agreed in schedule and the rate shallinclude the cost o urnishing all labour, materials, tools and equipmentrequired or drilling holes maintaining the holes ree rom obstructionsuntil groutedK and all incidental work.

Hooku2 to -rout ho"es*

'ayment or >ook-up to grout holes@ will be made at theagreed rates in the accepted schedule the rate shall include all labour,materials and or chargeable e$penses and overheads required inwashing, testing holes as required in these specifcations including cost o air where applicable, water, air lines, water lines, grout lines andincidentals like cost o plugging crevices, capping grout holes etc.

6. Tech Spec Civil

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Transcript of 6. Tech Spec Civil