Sipovi TU Eng

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3. OPŠTI I TEHNIČKI USLOVI GENERAL AND TECHNICAL REQUIREMENTS

MAŠINOPROJEKT KOPRING JVC. Dobrinjska street, number 8a, Belgrade

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GENERAL CONDITIONS FOR CONSTRUCTION

Contractors are required to perform the works fully complying with these General and Technical Requirements, which form an integral part of the project technical documents. Prior to commencement of work, Contractors (Site Managers) are required to thoroughly review all the designs and site investigation reports, and familiarize themselves with on site soil morphology and hydrogeological conditions. During their review, the Contractors are required to notify the Supervisor of all the irregularities identified in the design.

Contractors are required to prepare a critical-path-method-based detailed construction schedule and coordinate the construction accordingly. The construction schedule should be supported by a written document certifying that all the materials needed have been provided and that their delivery dates correspond to the construction time schedule.

Contractors are required to organize construction management on the site, provide the necessary premises and storages, as well as to appoint a Manager in Responsible Charge who will be authorized to perform the required type of work.

Construction Manager needs to: be present on-site at all times while the construction lasts; register with the AHJs in order to obtain the Notice of Commencement; and obtain all the permits and approvals necessary for commencement of construction according to the regulatory requirements for construction.

Prior to commencement of works the Contractor is required to survey and mark the building site, routes of all existing and underground utilities, positions of existing facilities, as well as to form a reference network using temporary bench marks, which will help control the elevations and directions at all times during construction. The work needs to be performed in full compliance with these conditions and other regulations for this type of work. If there happens to be an amendment of these regulations or new ones are to be passed in the course of construction, the Contractor is required to comply with their latest versions.

All items of the Priced Bill of Quantities suppose performing each item of works fully conforming to the plans, technical description, static calculation, details and subsequent designer details, applicable technical regulations, standards and instructions of the Supervisor and the Designer, with utmost professionalism and precision.

All the works and materials specified in the itemized descriptions of the PBoQ need to be included in the prices proposed by the Contractor. Prices contained in the PBoQ are the Contractor's selling prices, and are inclusive of all the costs of work and material, onsite and offsite transport, scaffolding (unless it is specified in a separate item of work), water, lighting, driving material and energy for the machines, utility costs, social security, all state and municipal charges, Contractor's earnings and all other costs that may be incurred due to the special conditions of work, envisaged by average norms in construction.A general description provided for one type of work and material binds the Contractor to perform all such works appearing in other items as provided in that general description, irrespective of whether or not the item concerned includes a reference to the general description, and, of course, unless otherwise specified in that item.

All construction works and construction trades require use of 1st class quality material. The material used for contracted works needs to correspond to the current SRP Standards or other recognized norms and standards applicable to the use of this material and corresponding to the descriptions of items of work that include it. Each material delivery must be supported with a certificate issued by the


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Supplier. Those materials that are not approved by the Client's representative, for not being of 1st class and planned properties, must not be used, unless the item of the PBoQ specifies its lower quality. All the material found incompliant with the PBoQ and Conditions the Contractor is required to remove off-site, and the Client's representative will suspend the works if the Contractor tries to use it. In the event there is a problem with a material, such material needs to be sent to the institute for material testing, whose results are authoritative both for the Client and for the Contractor. The Contractor will be responsible for all the materials used and not used, as well as for all the works performed before the final handover, i.e., before granting of the Occupancy Permit.

All construction works and construction trades require engagement of appropriate and qualified workers, as provided in the current average norms in construction. Upon Client's request, the Contractor is required to remove from the site all negligent and unprofessional workers.

The works need to be performed as specified in the design, contract and these conditions. Should there be an inconsistency between them, the Contractor is required to timely ask the Supervisor or the Design Professional in Responsible charge for a solution. Each change to the design needs to be approved by the Design Professional in Responsible Charge, Supervisor and the Client.

It is necessary to perform building and soil surveys during construction as provided in the Bylaw on Scope and Procedure of Building and Soil Surveys during Construction and Use.

In addition to these General Conditions for Construction, for building construction and overall construction works current Law on Building Construction is also binding.

SPECIAL TECHNICAL CONDITIONS

Groundwork

Prior to commencement of ground work, the Contractor is required to perform clearing and grubbing in the area of concern, and then in the presence of the Supervisor, based on the plans mark the building footprint on the ground, make permanent reference points and elevations following recognized surveying methods, and make a record of them in the construction log.

If the site is not prepared for construction, the Investor is required to provide the Contractor with timely demolition permits, as well as with the permits for temporary or permanent relocation of different facilities, utilities and trees.

All excavations need to be formed by proprely cutting their sides, to required slopes, with rough and fine planing of their bottoms.

Foundation pit securing, i.e., strutting and shoring of trenches and its sides needs to be performed in compliance with the Design of Foundation Pit and Foundation Pit Protection, as well as the Bylaw on Technical Norms for Construction of Building Foundations.During construction of foundations the Contractor is required to monitor groundwater levels. Prior to or during excavation plan appropriate actions to drain away ground or storm water.

Prior to commencement of groundwork, perform clearing and grubbing of the site on which the building will be constructed. After this, in the presence of a Suprvisor, measure the site on which the structure will be errected. Bind the structure to the ground both horizontally and vertically, and survey the cross sections in order to measure the excavated quantities for payment.


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Make sure to include all these works in the price of excavation, since they will not be paid for separately.

Perform excavation exactly as planned, vertically and laterally cutting trench sides, and finely planing its bottom on a level envisaged by the design.

If the soil undergoing excavation is of poor properties, the top layer about 20 cm thick needs to be stripped immediately before the commencement of foundation construction. Exacavation shall be performed in soils with natural moisture content, under normal working conditions.

The Contractor is required to coordinate the excavation and fill. If for whatever reason they cannot achieve this, the Contractor will be responsible to store excavated ground to a designated area and backfill it when the opportune. As the fill obtained from the borrow pit the final balance will admit only that part of the fill that could not have been obtained from the excavations formed in order to construct the building of concern. This needs to be approved by the Supervisor hired by the Employer.

Use the excavated ground primarily to fill over the foundations and around the walls, and transport the surplus ground offsite to a location designated by local AHJs, municipality of Supervisor hired by the Employer. Drainage of constant groundwater, as well as the work under water will be paid as a separate item of work if needed, while on the other hand, drainage of stormwater (precipitation) and of the water periodically inflowing from time to time will not be paid for separately.

Once the excavation is completed, the Contractor is required to ask the Employer/Supervisors for inspection and acceptance of completed excavation, i.e., approval that the building's foundations will be constructed on levels envisaged in the design.

The Contractor will not be allowed any overexcavations; rather, the Contractor will be required to backfill the overexcavated areas at their own expense using lean concrete, made with 100 kg of cement to 1 m3 of concrete.

Soil classification shall be performed by the Supervisor and the Contractor together, who will document their findings in the construction diary. Pricing the groundwork quantities for payment will be performed onsite, in compliance with the general norms in construction, general conditions for construction, on the basis of longitudinal and cross sections surveyed prior and posterior to excavation.

Payment shall be made for complete work on the basis of 1 m3 of excavated residual ground or m1 of completed work, as described in the general conditions.

Bulk excavations shall be all those excavations the bottom of which exceeds 20 m2, and the area of the smaller side exceeds 2,00 m1, including the excavations for foundations, pad foundations and smaller cuts.

Prices of all kinds of excavations are inclusive of the transport of ground to its point of use or the surplus ground landfill. This landfill will be chosed by the Supervisor.

Landfills and borrow pits will be treated in accordance with the temporary technical regulations. Excavated ground is classified on the basis of the following criteria:


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a) Classes 1 and 2 are all the excavations performed manually or with the aid of excavating machines in fertile soils, subsoil and sandy soil, compact sand and fine-grained unbound gravel.

b) Classes 3 and 4 are all the excavations performed with pickaxes, all types of bulldozers with blades and rippers, all types of excavators with a clamshell or a ripper, including conglomerate layers at the most 50 cm thick. Classes referred to in item a) can be considered classes 3 and 4 when excavated with pickaxes, buldozers or excavators.

The listed types of excavation under item „a“ can not be classified in the 3 and 4 category and when they are excavated by pickaxe, buldozer or bagger.

c) Classes 5 and 6 are all the excavations performed with pneumatic or electric drills, or mining, while can be classified based on the criteria under a) and b).

Excavations of larger scale shall be classified by the specialized committee during excavation and

after drilling, but before concreting and bricking of building parts that would obstruct future inspection

of excavation structure.

This committee will be formed of permanent representative of the Contractor and the Employer, and

a neutral expert in exceptional cases, when the Contractor's and Employer's representatives cannot

agree of the soil class.

All representatives forming the excavation classification committee, as well as their replacements will

be appointed in a decision of the Contractor and the Employer.

Costs of hiring a neutral expert will be paid by the Contractor and the Employer together, in all the

cases.

The committee will document the information on excavation classification in the construction diary of

the building concerned.

WIDE EXCAVATION OF SOIL

Works include wide excavations of all types of soil materials which are planned by the design together with transport i.e. pushing of excavated materials to the waste dump on the side in the zone owned by the Client due to later placement.

The design covers for the excavated mkaterials to be storaged to the local waste dump located within the plot.

All excavations should be executed accordign to profiles, described levels, presribed design slopes, taking into consideration the required characteristics for dedicated use of excavated materials and in conformity with these technical conditions and SRPS.U.E1.010.

Prior to commencement of works the Contractor is obligated to perform control of the designed profiles and to notify the Supervisor regarding possible discrepancies which will together with the contractor perform a new control. The necessary corrections will be inscribed into profiles and into the Site Book which must be signed, as the profiles, by authorized representatives by the Client and Contractor. The precision of excavation should be ±5cm. This procedure verifies the correctness of profiles for calculation.

Excavation should be performed by adequately selected mechanization so that the manual work is limited to the necessary minimum.


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Excavation categorization in the mixed materials is mandatory regardless if the Contractor requested it. It is executed towards the transversal profiles during construction in the percentage from the overall surfaces of transversal profiles for certain types of soil materials which is the basis for determining of total quantities for a certain category. Excavation categorization is performed by the Committe in the following constitution: Client – certified geomechanical labboratory, supervisor and contractor; they make a minute and on the basis of recognized percentages, through the minute, the Clients representatives calculates the categories.

During execution of excavation all necessary protective measures should be enforced for the complete safety during work and all necessary securing of the existing buildings and circulation areas. In each work phase efficient dewatering of the road trunk must be enabled. Sequence for execution of excavation should be adjusted in such manner so that „pockets“ would not form where water would collect in case of rain. Difficult work due to occurence of water during excavation will not be paid separately. Attention should be paid so that undermining does not occur, ballance disturbance or damage of slopes which are planned by the design. The contractor is obligated to repair any such case according to the instructions by the Supervisor and at his own expense.

Metering of quantities for excavation calculation is performed on the basis of actual volume of excavation metered in autochtonous state, on the basis of metering of transversal profiles after taking of humus and per the final excavation within the deisgn, namely changes approved by the supervisor.Larger excavated quantities from those in the designed are not paid if they occured by the fault of the contractor.

Payment per m3 of autochton excavation separately for certain types of soil materials. The price includes all excavation works with loading, transportation and unloading of materials on the side of the construction waste dump in the zone owned by the client.

MAKE AND MECHANICAL COMPACTING OF MATERIALS FROM FILL

These works include filling, srepading, rough i.e. fine spreading, wetting and compacting of materials by adequate selected means in conformity with the dimensions and levels from the design.

Making of fill is in layers. All works must be executed in conformity with the design and these technical conditions.Value of compressibility module for certain materials is determined by the

geomechanical laboratory on the basis of material characteristics.The required compactness by the deisgn is minimum minMe=25MPa.Slab testing should be executed on materials whose humidity is close to optimum.Ready fill must have the designed slope descents, dimensions and levels with tolerance

of maximum 5cm. Dimensions and slopes are metered after taking off from the slopes of non compacted layer, which is not paid separately because those works are included in the price for executed and compacted fill, wide and higher executed slopes occured by the contractors fault will not be calculated and the contractor is obligated to execute proper repairs to the designed dimensions with the tollerance of maximum 5cm.

Calculation and payment is per m3 of executed (compacted) fill metered per profiles.


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May, 2015. Design Engineer in Responsible Charge:

Zoran NOGULOVIĆ, MSCCE

Licence 310 0290 03


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TECHNICAL REQUIREMENTS FOR PILE DRIVING PROCESS

EARTHWORKS

Prior to commencement of earthworks on site, earth onto which the building will be erected will be clear of weeds and shrubs. Furthermore, site survey will be carried out in the presence of a Supervisor so as to decide the exact position of the future building. The survey will be performed both horizontally and vertically. Cross profiles will be surveyed as well in order to calculate future soil excavation. All of these works will be included in the price of excavation as they will not be charged for separately.

Soil will be dug exactly according to plan, all of which will be accompanied by either vertical or sloped removal of lateral excavation sides, whilst excavaton bottom will be leveled adequately so as to meet the design level. If the soil of poor quality is discovered on site, the last layer of cca 20 cm in thickness will be dug right before foundation has been formed. The term work used in the course of excavation means an excavation of moist soil in its natural state under the normal working conditions at the site.

Excavated soil will be chiefly used for backfilling around the foundation and walls, whilst surplus soil will be removed from the site and taken to the landfill. Bracing of lateral excavations as well as protection of adjacent facilities will depend on the natural state of the soil as well as on the position of adjacent facilities. The protection will be included in the price of excavation as it will not be charged for separately. In the same way the price will also include marking out of both building foundation and equipment, all of which has not been included in the project. Drainage of present groundwaters, as well as underwater activities will be charged for separately under specific work item if necessary, whereas the mentioned drainage of storm waters, i.e., precipitations which may represent occasional water flow into foundations will not be charged for separately.After excavation has been formed a Contractor has to request both inspection and acceptance of formed excavation from the Client, i.e., control which will confirm that the building sits on design foundations.Foundation redigging by a Contractor will not be allowed, therefore a Contractor will be obligated to fill all holes during redigging at his/her own expense up to design levels by use of lean concrete, i.e., 100kg cement per m3 of concrete.

Soil category will be decided by both a Supervisor and a Contractor; all of which will be entered up in the Site Book. Earthworks will be calculated at the site according to Required Standards in Civil Engineering, General Work Performance Requirements and in line with both longitudinal and cross profiles surveyed both before and after excavation.

Payment will either be made per m3 of excavated soil or per m3 of formed excavation, all in conformity with the General Technical Requirements. Wide excavation means all excavations stretching over 20,00m2 whose smaller side is over 2,00m, it also means excavations on foundations and pad foundations as well as excevations at cuts.


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Excavation price includes soil transport to the trench or to a landfill where surplus soil is deposited.

Excavated soil is categorized according to the following criteria below:- I and II category refers to all excavations performed either manually or mechanically onto fertile land, sub-soil and sandy soil, compacted sand and fine unbound gravel- III and IV category refers to all excavations performed by pickaxe, all types of bulldozers with the blade and a ripper, all types of excavators with a stick and bucket, including all conglomerate layers maximum 50 cm thick. Soil types specified under I and II category cannot fall under III and IV category not even when they are dug by pickaxe, bulldozer or a bagger

- V and VI category refers to those excavations formed by electric pneumatic drills, which do not belong to any of soil categories mentioned aboveCategorisation concerning excavations of bigger size is decided by the Inspection Committee in the course of excavation and after they have been formed i.e., prior to both casting in place and brick laying which could hinder later insight into excavation structure.The Committee is composed of Contractor’s representatives, Client and possibly of a neutral expert when Contractor’s and Client’s representatives cannot agree on excavation categorisation. Above mentioned representatives are appointed by both the Client and the Contractor through official certificate delivered to the Excavation Categorisation Committee. Data on excavation categorization are entered up in the Site Book by the Committee.Expenses concerning engagement of neutral persons will be incurred equally by both the Contractor and Client at all times.

REINFORCEMENT

Reinforcement B500B will be used in full compliance with SRPS EN 10080. Reinforcing bar has to be clear of dirt, rust, grease and other. In the course of further concrete casting in place, reinforcement ends which protrude from the concrete will have to be cleaned adequately as described above. The main reinforcement will be attached to every U-bolt, whilst protruding reinforcement will be taut by a burnt wire ø1mm, all of which will be done adequately so as to meet the details. Only those quantities actually installed in concrete will be considered during payments, supply and laying of reinforcing bars, all of which will be done either fully in line with reinforcement plans or Supervisor’s decision if the quantity is exceeded, i.e., after a Supervisor has allowed it. If the Contractor fails to provide adequate reinforcement diameters the same Contractor will change details, calculate them again and produce new ones at his/her own expense. Structural design and details are submitted to both a Designer and a Client for an approval, i.e., work is commenced after a go-ahead signal. In such case, reinforcement weight installed in the said way will not be paid by the Client, i.e., the Client will not pay for more than agreed in design details. Payment regarding installed reinforcing bar will be made per unit price for one kg of iron, which includes: purchase and delivery of reinforcing bars, binding wires, washers and other additional fittings, cleaning, cutting, bending, installation, welding and all other expenses in connection with purchase and laying of a reinforcing bar.


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CONCRETE AND REINFORCED CONCRETE WORKS

Both casting in place and concrete laying will be performed mechanically. Designated concrete class will be achieved through proper mixure of Portland cement, water and aggregate, as well as by use of mixtures of adequate quality and testing of selected cubes sampled by the Contractor and sent to the Institute for Materials Testing. Expenses regarding the tests will be included in the unit price of concrete. Portland cement will be delivered to end users on site in either original bags or cisterns. Cement must be kept in dry areas and moved to another location every 3 days, whereas cement from cisterns has to be stored in closed airtight tanks. If a poor concrete quality is achieved when compared to a tolerance required in technical regulations, such laid concrete will be replaced only if the reduced quality places the structure in jeoperdy, i.e, only if the previous approval is obtained by both a Designer and a Supervisor. Both interruption and continuation of concrete casting will be performed in full compliance with technical regulations and instructions given by both a Supervisor and a Designer. Possible honeycombing in concrete will be both filled and plastered by the Contractor after it has been given a go-ahead signal by the Supervisor, with no right to compensation. Concrete segregation will be avoided either by use of funnel or by stirring. The structure will be protected against the sun, wind and frost during the day, which will be included in the price of concrete. All works must be performed in a way to correspond to layouts, details and structural analysis, i.e., in a higly professional manner by engaging adequate professional work force and professional supervision on site. All concrete surfaces will be made smooth so that noticeable concrete surfaces will be flat and its edges undamaged. Unplastered concrete surface will be placed in a formwork plastered on the inside.

Calculation regarding completed works will be made according to actual quantities used at the site. The price also includes formation of utility tunnels for water supply pipes, sewer pipes, central heating, formwork and other. Reinforcement will be calculated separately.Fluvial aggregate of exactly the same grading as “Moravac” gravel will be used for casting of concrete. For that reason, constant control both over dosing and granulometric composition will be introduced on site. Water, which is needed for concrete production, will come from the water main.Formwork will be sprinkled over the course of casting, which will be included in the price of concrete.The price of formed concrete includes all expenses in connection with delivery of concrete both inside and outside the site (both horizontal and vertical), overheads, all taxes, tools, work and material, electricity and other, all of which will not be charged for separately. Both Bylaw on Technical Measures and Requirements for Concrete and Reinforced Concrete and Bylaw on Technical Merasures and Requirements for Prestressed Concrete will be fully adhered to in the course of concrete casting. Contractor is obligated to test the aggregate prior to concreting of structure elements in conformity with SRPS B.B.0B001, U.M.8.020, U.M.8.021, B.B.8.030, B.B.8.032, B.B.8.034, B.B.8.035, B.B.8.036, B.B.8.037, B.B.8.038, B.B.8.039, B.B.8.040, B.B.8.044, B.B.8.047 and B.B.8.048 prior to casting of structural members.


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As for concrete class MB-30 and 40, Contractor has to test the cement in conformity with SRPS B.C.1.012, and B.C 8.020. Contractor is obligated to test cube samples to SRPS U.M.1.010, U.M.1.011, i U.M.1.012.

PILE DRIVING

After ground has been adequately leveled, piles will be marked by temporarily driven stakes. Pile driver will be positioned adequately at its intended position for pile driving, whilst its associated equipment parts will be positioned vertically. Boring is carried out on the rough site surface which is cca 20cm higher when compared to the level of design low foundation surface. Boring can also be carried out in the presence of groundwaters, whereas a borehole has to be lined with a steel casing in the course of drilling, rebar installation and pile concreting at all times. If pad foundations, parts of old foundations, MEP systems or alike are discovered at the site in the course of boring in such case both a Supervisor and a Designer will be informed about it.After boring has been completed, the position of steel casing will be surveyed with an adequate instrument and its exact position entered up into the Site Book. Under no circumstances will a bore hole axis depart from a design one for more than 5 cm along its entire height.If bigger bore holes are observed on site when compared to design ones, such bore holes will be backfilled with sand and new ones drilled at Contractor’s expense.Once the pipes are lowered down to borehole bottom, on no account will such pipes be pulled out until a pile has been cast in place.Excavated material from the bore hole will be placed at borehole’s lateral sides and as such it will be shown to a Supervisor for inspection, who will in turn in the event of any kind of irregularity or doubt require Designer’s opinion.After excavated material has been inspected by a Supervisor and if a Supervisor will allow it, the said material will be removed from the construction site.

REINFORCEMENT CAGE

Reinforcement cages or rebars made from reinforcing bars will not be assemblied at the site, i.e, they will be delivered as ready-made. Used steel has to be fully compliant with regulations. Cross reinforcement will be 50% welded to a longitudinal one. Rebars will be delivered in a careful manner at the site so they would neither suffer deformations nor distortions.Delivered rebar at site will be lifted carefully by either a hoist or a pile driver, positioned vertically and lowered down the borehole immediately after the bore hole has been cleared and Supervisor’s approval in writing on pile driving continuation process obtained.

If problems of any kind would be encountered during rebar installation, the same rebar will be pulled out, inspected, dimensions checked and possible mistakes rectified.

Rebar will not touch the borehole bottom; instead it will be placed at about 10cm above its bottom so as to provide a protective layer for adequate pile positioning. Time between rebar installation and casting of concrete will not last for more than 2 hours, i.e., only under special circumstances and after Supervisor’s approval in writing has


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been obtained will time between rebar installation and casting of concrete last up to 4 hours so as to stop fouling of reinforcement and formation of clay film on it.Boring schedule and pile driving depend on conditions at the construction site.Pile concreting schedule is decided by a Supervisor in full accordance with work performance schedule and general conditions observed on site.

CAST-IN-PLACE CONCRETE PILES

Pile casting is carried out in full compliance with regulations and TUI by MB 40 (C30/37) ready –made concrete delivered at the site.Concrete is poured into steel casing D=200mm, i.e., casing is pushed into both rebar’s axis and concrete to a depth of 2,00m, whereas at the start of casting the casing is lowered to a depth of about 10 to 15 cm above the borehole bottom, meaning that concrete is pumped inside until steel casing is lowered to a depth of 2,00m and later forced out following concreting.Lowering of steel casing down the borehole is mandatory so as to avoid contact between fresh concrete and the first layer of cast concrete which emerges at the surface, meaning the steel casing is slowly and gradually forced out at the top of the borehole and cropped.

Depth at which the steel casing is lowered has to be controlled at all times so as to ensure depth of around 2,00m at which the casing will be positioned.When dismantling, removing and cropping the steel casing, the same casing will be pulled out above the concrete surface, low part of the casing will be secured to the surface around the borehole, one segment /part/ will be forced down into concrete, concrete will be poured into the funnel, the funnel will further lower the casing down through which concrete will be poured. The whole operation concerning pipe cropping will not last for more than 10 min.

If the requirement set out in item V.03 is met and concrete mix still continues to be poured quickly, in such case water cement factor of concrete should be reduced. Casting may also be performed with pumps if better concrete quality is required. Funnel for concrete pouring has to be in a shape of a cone, whose sides sit at an angle of not less than 45° when compared to their horizontal plane. Funnel dimensions should assure funnel volume of approximately ¾ of total steel casing volume, which allows continuity of concrete pouring through the casing. As far as the casing of D=200mm and concrete pouring depth of 20,00m is concerned, funnel volume of about V=0,65 m³ is required.Proper casting of concrete at its very beginning is essential for the quality of a driven pile; therefore special attention will be paid to it. As far as the first concrete pouring goes, the quantity of prepared concrete has to be such to meet the volume of borehole at the depth of 2,00m. After the first concrete layer is poured casting will continue in parallel with forcing out of casing at the height of 5 to 10 cm making sure that the low part of the casing does not empty. If the casing does empty during concrete pouring the same casing will be forced back into the concrete mix until concrete level in the funnel is brought to an equal level with the level of both funnel and casing. Pile will be concreted at the level of minimum 30 cm which is higher when compred to the level of low edge of girders positioned at the same place, fully in accordance with design data. Pile will be concreted in continuation with no interruptions whatsoever, all of which depends on adequate concrete delivery organization which assures concrete pouring prior to its binding. Concrete binding process will not last less than 2h from the moment of its mixing. Used concrete has to be of such properties to ensure both safe and


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proper grouting of a borehole through the casing, whereby all impurities on the reinforcement will be cleared away, i.e., ejected onto the surface. Either portland cement PC 350 or the one of better characteristics will be used in order to form concrete, whereas quantity per m³ of concrete will not be less than 380 kg/m³. Aggregate grain diameter will not exceed 38mm.Admixtures inside the concrete mix will not affect its quality at any time, while permission for their use is given by a Supervisor.Piles will be cropped at the height of 20 to 30 cm all the way down to a low edge of a foundation beam at least 72 hours upon pile casting.

Designer

Nikola Muravljov, MSCCE

Licence 310 0169 03

Belgrade, February 2015. Design Engineer in Responsible Charge

Zoran Nogulović, MSCCE

Licence 310 0290 03


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