SPECIFICATIONS AND ADDITIONALSPECIAL CONDITIONS OF CONTRACT

Note:i) In these Specifications and Additional Special Conditions of Contract,

wherever the name of N. Railways is mentioned, it should be read as N. Railway/ IRCON or IRCON as the Context would require for the purpose of this tender.

ii) The word 'Contractor' shall be understood to mean "the Sub Contractor" as well & vice-versa.

1.0 CODES AND SPECIFICATION1.1 The execution of all works under this tender shall conform to the

specifications and codes of practice mentioned below as amended from time to time and as per the Instruction of Engineer-in-Charge.

1.1.1 N. Railway specifications for materials and work 1987.1.1.2 Northern Railway General Conditions of Contract 1999.1.1.3 CPWD Specification 2002 for material and works1.1.4 Any other relevant IRS / IS / Other Code as per the instruction of

Engineer-incharge. 1.2 CODES OF PRACTICE TO BE FOLLOWED: -

The following codes of Practice as amended from time to time shall be followed generally unless otherwise specified in the Additional Special Conditions of Contract or Schedules.IS: 5878 (Part I) 1971 Precision Survey and setting out.IS: 4081-1967 - Safety Code for Blasting and Related drilling operations.IS:4082-1996 - Carriage of materials, recommendations of stacking & storage of construction material at site.IS:1200 (Part I) – 1992 Earthwork, methods of measurement.IS:11134-1984 – Code of practice for setting out of works.IS: 3764-1966 - Safety Code for Excavation work.IS:1904-1978 – Code of practice for structural safety of building foundations.IS:1256-1967 – Code of Building By-laws.IS: 4138-1977 - Safety Code for Working on Compressed Air.IS: 7293-1974 - Safety Code for Working with construction Machinery.IS:3696 (Part I) 1987 – Safety code for scaffoldings and ladders (scaffoldings).IS:3696 (Part II) 1987 – Safety code for scaffoldings and ladders (ladders).IS:8112-1989 – Specification for 43 grade Ordinary Portland Cement.IS:1727 – Specification for sand for plaster.IS:2250 – Specification for sand for masonry.IS:1905-1980 – Code of practice for structural safety of building masonry walls.IS:383-1970 – Specification for fine & coarse aggregates.IS:456-2000 – Code of practice for plain and reinforced concrete for general building construction.

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IS:7861 (Part I & II) – Code of practice for hot weather and cold weather concreting.IS:516 - Method of test for strength of concrete.IS:432 (Part I & II) – Specification for mild steel, medium tensile steel and hard drawn steel wire for concrete reinforcement.IS:1786-Specification for high strength deformed steel for concrete reinforcement.IS:12502-Code of practice for bending and fixing of bars for concretereinforcement.IS:1077-1992-Specifications of common burnt clay building bricks (5th revision).IS:1123-1975 – Method of identification of natural stones.IS:1126-1976 – Method of tests or determination of durability of natural building stones (reaffirmed 1990).IS:1003 (Part I) 1991 – Specification for timber panelled and glazed shutters (door shutters).IS:1003 (Part II) 1993 – Specification for timber panelled and glazed shutters (window & ventilator shutters).IS:1200 (Part XII) – 1973 – Wood work Joinery (reaffirmed 1992).IS:1038-1983 – Steel doors, windows and ventilators (reaffirmed 1991).IS:2571-1990 – Code of practice for laying cast in situ cement concrete flooring.IS:277-1992 – Galvanised steel sheets (plain & corrugated).IS:1230-1979 – Cast iron Rain Water Pipes & fittings (reaffirmed 1991).IS:427-1965 – Distemper dry, colour as required.IS:428-1969 – Distemper oil emulsion, colour as required.IS:2932-1994 – Synthetic enamel paints exterior.IS:5410-1992 – Cement paints.IS:5411-1974 – Plastic emulsion paints.IS:1729-1979 – Sand cast iron spigot and socket soil waste and ventilating pipes and fittings.IS:771 (Part I & II)-1985- Glazed fire clay sanitary appliances.IS:458-1988 – Precast concrete pipes (with and without reinforcement).IS:651-1992 – Specification for salt glazed stone ware pipes and fittings.IS:1726-1991 – Specification for cast iron manhole covers and frames.IS : 226-1975 - Structural steel (Standard Quality)IS : 1893-1975 - Criteria for Earth quake resistant design of structures.IS : 1200 (Part - XXV) 1971 - Methods of Measurement of Building and Civil Engineering works.IS : 800 - Code of Practice for use of Structural steel in General Building Construction.Indian Railway's Schedule of Dimensions of Broad Gauge.Indian Explosive Act-1988.Indian Explosive Rules-1983.All other relevant IS /IRC codes as applicable for completion of work.All other approved plans & drawings for building work, water supply, sewerage and drainage works.

1.3 The IRCON reserves the right to reject of alter any part of the work executed by the Contractor which in the judgement of the IRCON does not comply with the requirements of the above specifications. The decision of

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the IRCON shall be final and conclusive for all purpose and contractor shall have no claim on this account whatsoever.

2.0 SETTING OUT OF WORKS2.1 The contractor is to set out the whole of the works in consultation with the

official to be deputed by the Engineer and during the progress of work to amend on the requisition of the Engineer any errors, which may arise there in and provide efficient and sufficient staff and labour therefore. The contractor shall alter or amend any error in the dimensions, lines or levels to the satisfaction of the Engineer or his authorised representative without claiming any compensation for the same.

2.2 The contractor at his own cost shall also provide, fix and be responsible for the maintenance of all stacks, templates, profiles, land marks points, burjies, monuments, center line pillars, reference pillars etc. and shall take all necessary precautions to prevent their being removed, altered or disturbed and will be responsible for the consequences of such removal, alterations or disturbances and for their efficient reinstatement

2.3 Before the work is started by the contractor, the ground between wherefilling/excavation is to be done shall be cleared of all trees along with their roots, shrubs, heavy grass and undergrowth of every kind. None of the items of work mentioned in this area will entitle the contractor/s to any extra payment. The trees which have been planted by IRCON and removed by the contractor will be the property of the contractor/s and the trees which have been planted by other than IRCON will be cut by the contractor free of cost and will be lead to the store of concerned authority as directed by the Engineer-in-charge. No extra claim will be entertained whatsoever. No trees falls outside railway land of the trees but any delay on this account will not basis for claim.

3.0 MATERIALS3.1 The materials used on the works and supply by the contractor shall

conform to CPWD Specifications 2002 for material and works and relevant IS/IRC/IRS specifications.

3.2 The samples of material, which the contractor intends to use on works, shall be got approved in advance from the Engineer-in-charge before commencing the use

3.3 If any material is rejected at site due to its non-conformity to specifications, the contractor shall arrange to remove all such materials from Railway/IRCON land at his own cost within 7 days from receipt of notice do so. In case of default, theremoval from Railway / IRCON land to the place decided by the Engineer-incharge shall be got done by IRCON at the risk and cost of the contractor.

4.0 WATERThe quality of water shall be as per its relevant specifications and fit for use indifferent cement & concrete works and curing etc.

5.0 CEMENT

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5.1 Cement brought by contractor for use should be from reputed manufacturers such as ACC, Ultra-Tech (Earlier named as L&T), Gujarat Ambuja, Aditya Birla Group or similar brand from their authorized dealers only. Similarly steel brought by contractor should be from reputed manufacturers such as SAIL/TISCO/RINL.

5.2 Cement older than 3 months from the date of manufacture as marked on the bags shall not be accepted. The cement bags in proper bag packing should bear thefollowing marking:i) Manufacturer’s name.ii) Registered trade mark of manufacturer if any.iii) Type of cement.iv) Weight of each bag in kgs.v) Date of manufacture, generally marked as week of the year.

5.3 Quality test certificate along with purchase bill in original for cement as per IS- 4081 shall be furnished by the contractor at his own cost from the manufacturer before use of cement.

5.4 IRCON may also take samples during the course of execution of works and get the cement tested to ascertain the conformity to relevant IS specifications at contractor’s cost before particular lot is put to use. Frequency of testing shall be as prescribed by the relevant IS codes. Following tests interalia shall be carried out:i) Finenessii) Compressive strengthiii) Initial and final setting timeiv) Soundnessv) Other tests if necessitated

5.5 Cement shall be stored above ground level in perfectly dry and water tight sheds. Stacking of cement in godown shall be done on a layer of wooden sleepers so as to avoid contact of cement bags with the floor or alternately scrap GI sheets may also be used in place of sleepers but those shall be stacked at least 30cm clear of the walls to prevent deterioration. Cement shall be stacked not more than 8 layers high to prevent bursting of bags in the bottom layer and formation of clods Cement shall be stored in such a manner to permit easy access for proper inspection. Stacks of cement bags shall be covered with tarpaulin during monsoon so as to obviate the possibility of deterioration of cement by moisture in the atmosphere. Cement, which is partially set, is on no account to be used on works.

6.0 CONCRETE WORKS6.1 The aggregates used shall be of approved quality, satisfying all codal

requirements. 6.2 Concrete required for all works shall be machine mixed only. Hand

mixing will be permitted only with specific approval of the Engineer and shall generally be limited to small quantities and for use in locations where strength is not a criterion. The concrete must also be properly vibrated with mechanical vibrators.

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6.3 The contractor shall prepare at his own cost standard cubes of concrete at suitable intervals during concreting operations and test them under the supervision of the Engineer or his authorized representatives and submit the test results for approval.

6.4 While executing all concrete works below sub-soil water level, the foundation pit must be kept free of all seepage water by bailing or pumping or in any other manner. The rates quoted for concrete items shall include the charges for all such works.

7.0 PROTECTION WORKS AND PITCHING WORKS7.1 Pitching of the banks should not be commenced until the banks have been

completed to approve profiles and passed by the Engineer-in-charge.7.2 Protection works should be done in the open during the dry season as far

as possible when the water level in the river is low. Stones will not be permitted to be thrown or dumped under water.

7.3 All protection works including pitching will be done in accordance with Northern Railway Standard Specifications or as directed by Engineer-in-charge.

8.0 RANDOM RUBBLE MASONRYIt will be provided in the toe walls, bands for pitching panel in training works and guide bunds and as may be directed by the Engineer. This masonry will be provided as per Northern Railway standard specifications-1987. River bouldersand large pebbles hammer dressed quarry stone will be allowed to be used in this masonry.

9.0 PROVISION OF PITCHINGSlopes of the guide bunds and embankments, whenever required shall be protected by providing hand packed dry boulder pitching or grouted pitching as specified in drawings.

9.1 The dry pitching shall be required to be done either in continuous stretches or in panels as per approved drawings/or as directed by Engineer-in-charge. It shall be sufficiently and closely hand packed by filling voids.

9.2 The stone/boulder in the slopes of the guide bunds and in the aprons should be carefully hand packed and also hammer dressed lightly wherever necessary and it is only in the incidental filling of the voids and hollows that smaller size boulders may be allowed to be used.

10.0 BRICK WORK10.1 All brickwork shall be done in well-burnt bricks of class designation-75 as

per CPWD 2002 Specifications in cement mortar in proportions as may be specified in the drawings or as instructed by the Engineer-in-Charge.

10.2 The contractor will get the samples of bricks, which he intends to use and the source of supply approved from the Engineer-in-charge. However, this will not absolve the contractor from his liability to ensure the quality of bricks.

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10.3 After bringing the bricks at site, the contractor will stack and offer to theEngineer-in-charge for inspection. After inspecting the stacks, the Engineer-incharge will either reject or pass the bricks in writing. The stacks passed by the Engineer-in-charge shall be used at site and rejected stacks shall be removed from the site within 7 days of the rejection. In case, the rejected bricks are not removed from site, within the prescribed period, the Engineer-in-charge may order the removal of such stacks from the site at the cost of the contractor.

10.4 All pipes, clamps or other fittings as may be required, shall be fixed in position as the work proceeds in the brick wall before housing the fittings.

10.5 No claim for any additional labour involved in doing masonry work around switchboard, junction boxes etc. shall be entertained.

11.0 FORM WORK AND SHUTTERING11.1 Shuttering shall be either of plywood of approved quality on wooden

frame or of steel plates stiffened by steel angles. During casting of concrete, the shuttering shall be supported on wooden battens and props of vertical ballies properly crossbraced to make the form rigid.

11.2 The formwork shall conform to the shape, lines and dimensions as shown on the plan. It shall be sufficiently rigid and to maintain correct shape of the members during deposit of concrete and shall be able to resist forces caused by vibration of concrete and incidental loads associates with men working over it. The shuttering shall have smooth and even surface and its joints shall not permit leakage of cement slurry

11.3 If at any stage of work during or after placing concrete in the structure, the form work bulges out beyond their required shape of the structure, the concrete shall be removed and work done with fresh concrete inadequately rigid form work. Details of the shuttering and centering shall be subject to the approval of Engineer-in- Charge. The formwork shall be inspected and approved by the Engineer-in- Charge before the reinforcement bars placed in position.

11.4 The shuttering for beams and slabs shall have camber of 4 mm per metre (1 in 250) or as directed by the Engineer-in-Charge so as to effect the subsequent, deflection. For cantilevers the camber at free end shall be 1/50th of the projected length or as directed by the Engineer-in-Charge.

11.5 In the case of structures with RCC frame work, such as multi storied structures, concrete piers and abutments of important bridges, folded plates etc. which should have exposed surface of steel shuttering or shuttering manufactured out of good quality water proof plywood (like anchor ply) shall be permitted. In the case of such important concrete structure where high quality concrete finish is a must or where controlled concrete has been specified for use, the shuttering will beassembled to ensure leakage proof formwork.

11.6 Provision shall be make in the shuttering for inserting fan hooks clamps, provision for conduit etc. for concealed wiring and providing architectural finish in grooves, if any, at the junction of slab with beams of wall columns wherever required for architectural consideration or concealed

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sanitary and water connection with the provision of various services in the building for service or architectural reasons. It may also be necessary to make holes in the shuttering of RCC columns for projecting bars. The tendered rates shall include cost of providing above-mentioned services etc. and no extra payment shall be made tothe contractor for making these provisions nor any deduction shall be on account of any saving in the RCC work due to these.

11.7 The formwork for the RCC Chajjas will be so made that the drip coarse and (including the putty and the drip) the cast along with the Chajjas. No extra payment shall be made for this drip coarse.

12.0 PLAIN CONCRETE AND RCC WORKS12.1 After completing the formwork and shuttering, the same shall be offered

for inspection to the Engineer-in-charge and only after his clearance further work of placing the reinforcement in position and casting of concrete shall be taken in hand. The material used in CC/RCC works shall conform to relevant CPWD and IS specifications.i) These specifications shall be read in conjunction with any other

specifications for concreting work given elsewhere in tender document.

Ii) Clear cover will be provided as per drawing or as directed by Engineer-incharge.

12.2 AGGREGATES FOR CONCRETING12.2.1 Coarse Aggregates

Coarse aggregates shall be as per specification and shall conform to requirements of IS 383/IS 456 & IS: 1343.

12.2.2 All coarse aggregate material shall be chemically inert, strong, hard, of limited porosity and free from adhering coatings, clay and organic or other impurities that may cause corrosion of the reinforcement or affect the strength and durability of the concrete.

12.3 FINE AGGREGATE16.3.1 Fine aggregate shall be of approved quality and grading conforming to IS:

383, IS: 456 & IS 1343 standards. It shall be free from impurities and deleterious substances.

12.3.2 The decision of Engineer-in-charge shall be final regarding approval of the coarse and fine aggregates for the concreting works. The contractor shall be required to carry out washing and sieving of aggregates if directed by Engineer-in-charge and all costs for the same shall be borne by the contractor.

12.4 STORAGE OF AGGREGATESCoarse aggregates shall be delivered at site and stored in separate sizes as ordered by the Engineer-in-charge. The Engineer-in-charge shall decide and direct thecontractor to bring, stack and store aggregates in different sizes as he deems necessary for the proper quality control. Aggregates shall be stored or stock piled in such a manner that segregation of fine and coarse sizes

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will be avoided and also that the various sizes will not become intermixed before proportioning. These shall be stored, stock piled and handled in such a manner that will prevent contamination by foreign deleterious materials. In the case of fine aggregates they shall be deposited at the mixing site for not less than 8 hours before use and should be got tested and approved by the Engineer.

12.5 REINFORCED CEMENT CONCRETE12.5.1 All concrete works whether plain or RCC should conform to CPWD & IS

specification for plain / reinforced concrete, mix design (mix design to be submitted by contractor & approved by Engineer-in-charge.

12.5.2 All concrete shall be mixed in an approved concrete mixing machine. All such cement concrete should be vibrated by use of mechanical vibrators and nothing extra over and above the rates for mass concrete/RCC will be payable for these operations.

12.5.3 Welding of reinforcement will not generally be permitted except in special circumstances under the written approval of the Engineer in accordance with the relevant IS codes.

12.5.4 The exposed surface of mass cement concrete and RCC work shall be rendered to leave the surface smooth and even. Nothing extra will be payable for rendering the exposed surface, the cost of which will be considered as having been included in the item rates quoted in the schedule of items, quantities and rates.

12.5.5 In addition to the routine tests of materials, tests will be carried out whenever required by the Engineer-in-Charge. The cost of the special test will be borne by the contractor. Necessary facility in the form of moulds cones, scales, material, labour for casting, curing specimens and such other facility as are pre-requisite to any standard concrete test will be in any case, afforded by the contractor free of cost.

13.0 REINFORCEMENT13.1 The contractor is required to arrange steel at his own required for works as

per approved drawings and conforming to specifications. The Contractor shall be required to use TMT reinforcement steel of SAIL, TISCO, RINL as per approved drawings and nothing extra over and above the percentage quoted by him in financial bid shall be payable. The rate shall be inclusive of providing, cutting,straightening, hooking, bending, binding & placing in position the reinforcement steel.

13.2 Payment of fabricated structural steel work with steel of SAIL/TISCO/RINL only approved shall be made based on calculated weight of finished work as per standard weights and approved drawings. In calculating the weight, the overall length of the members used will be taken into account and no deduction made for rivets / bolt holes / skew cuts, notches etc. Gussets etc.

13.3 Payment for reinforcement steel shall be made as per total weight calculated based on total length of different dia steel bars used as per

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approved drawings or as directed by Engineer-in-Charge considering standard weights of steel bars as gives in steel tables.

13.4 Payment shall be made for actual quantity of steel used as per approved drawings excluding all the wastages thereof.

14.0 MEASUREMENTSAll works will be paid for at the tendered rates on the basis of actual measurement taken at site as per CPWD specifications.

15.0 RATES15.1 The tendered rate shall include all labour and material and its placing in

position as per plan, screening and washing of the aggregate if required, weigh batching mixing the concrete mechanically and placing the same at different locations as per plan, provision and use of equipments, including mechanical mixer, vibrator etc. and curing & finishing the exposed surface. Nothing extra whatsoever shall be paid.

15.2 Controlled concrete with TMT reinforcement bars will be used wherever so specified in the approved drawings or as instructed by the Engineer-in-Charge.

15.2.1 The provisions specified in IS:456:2000 for preparation of proportioning and mix design for controlled concrete will apply in general unless otherwise modified by the Engineer-in-Charge.

15.2.2 For all concrete work the aggregate will be analysed as per standard test to determine their property and their grading from the laboratory approved by the Engineer-in-Charge. As far as possible the stock piling of the aggregates shall be done in accordance with Standard practice to enable standard analyst being made for each batch that is brought to the site. The design of the mix will be got done along with representative samples of the aggregate & water. The preliminary test results along with the analysis of aggregate and mix design calculation should be submitted to the Engineer-in-Charge for his approval and expenditure involved for mix design will be borne by the contractor.

15.2.3 The contractor/s will modify/carrying out and submit the mix design to the satisfaction of the Engineer-in-Charge, if so required and get his final approval, such approval, however, does not relieve the contractor/s for his/their responsibility and obligations regarding the minimum strength requirement.

15.2.4 All controlled concrete shall be weigh batched. For this, it will be preferably to have mixer with device for automatic weighing and adding their required quantity of water. For controlled concrete work moisture content in the aggregate shall also have to be taken into consideration.

15.2.5 All test shall be carried out in accordance with IS Codes of practice and as decided by the Engineer-in-Charge.

15.2.6 The contractor shall establish a filed laboratory/and provided but necessary equipments to carry our preliminary tests and working out the grading and proportioning the aggregates assessing the moisture contents, casting of cubes etc. to obtain and maintain uniform quality of work conforming practices.

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15.2.7 The tenderers shall formulate his rates for controlled items taking into account the extra work involved as the above and no claim for extra payment on this account shall be entertained.

15.2.8 In case of any dispute regarding interpretation any of the above quoted clause, decision of GM/IRCON will be final and binding on the contractor.

15.2.9 IRCON may also take samples of aggregate use in the concrete during the execution of work and get the material tested from the laboratory to ascertain the conformity of material as per mix design at the contractor’s own cost.

16.0 CURING

The CC/RCC, brick work including plastering and pointing etc. shall becontinuously kept moist for the periods prescribed in CPWD specification. Curing of CC/RCC surfaces shall be done by covering the newly laid concrete with wet Hessian cloth or by filling water over the surface. Curing with water is very important aspect for quality and strength and is not to be ignored. Nothing extra on this account shall be payable. If it is found, curing is not being done properly by observing above instructions, the Engineer-in-charge may undertake curing through alternate means without any notice, at the risk and cost of the contractor. Intimation of employment of another agency for curing will be given to the contractor as soon as possible. This intimation in writing to the contractor under the signatures of Engineer-in-charge shall be conclusive evidence of the employment of another agency.

17.0 STEEL WORK WELDED IN BUILT UP SECTIONS

17.1 The IS Code of practice for electric welding of mild steel structures shall be followed wherever welding is required to be carried out.

17.2 As far as possible effort shall be made to limit the welding when the structure is erected to rectify the defects only so as to avoid improper welding and damage to structure.

18.0 WATER SUPPLY AND SANITARY INSTALLATIONS

18.1 For execution of sanitary installation and water supply work the contractor shall arrange a licensed plumber and specifically skilled artisan shall be employed by the contractor for sanitary installation work. The work shall be executed as per CPWD-2002 and IS specifications.

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18.2 The work of providing GI and/or SCI pipe required shall proceed along with the construction of building to avoid demolition if breaking up of masonry at later stage.

18.3 Size of MS clamps for fixing of pipes of different dia shall be as per size of the pipes.

18.4 Samples of sanitary installation and fittings such as G. I. Pipes & fitting, Stone ware Pipes, R.C.C Pipes etc. shall be submitted to the Engineer-in-charge for approval before supplying and fixing the same and the contractor shall ensure that all fittings provided by him are strictly accordance with the approved samples.

18.5 Salt glazed stoneware pipes as per relevant IS specifications shall be used for disposal of sewerage. Pipes brought shall be supported by requisite test certificates and approved by the Engineer-in-charge before use.

19.0 WHITE WASHING, DISTEMPERING & PAINTINGStandard brand of lime, distempers, primers, cement paints and enamel paints as per relevant IS specifications and as approved by Engineer-in-charge shall be used for white washing, distempering and painting of wood work, steel works and exteriors. The rates cover the cost of all labours and materials, cleaning materials, ladders, scaffolding, tools, plants and equipments including brushes of approved pattern at the contractor’s cost.

20.0 In case of any disputes regarding interpretation of any of the above quoted clauses, the decision of PD/Srinagar, will be final and binding on the contractor/s.

21.0 GALVANISED IRON PIPES

21.1 The pipes (tubes) shall be galvanized mild steel hot finished seamless (HFS) or welded (ERW) HRIW or HFW screwed and socket conforming to the requirements of IS:1239 Part-I for medium grade. They shall be of the diameter (nominal bore) specified in the description of the item. The sockets shall be designated by the respective nominal bores of the pipes for which they are intended.

21.2 Galvanizing shall confirm to IS:4736. The Zinc coating shall be uniform adherent, reasonably smooth and free from such imperfections as flux, ash and dross inclusions, bare batches, black spots, pimples, lumpings, runs, rust stains, bulky white deposits and blisters. The pipes and sockets shall be cleanly finished, well galvanized in and out and free from cracks, surface flaws laminations and other defects. All screw threads shall be clean and well cut. The ends shall be cut cleanly, and square with the axis of the tube.

21.3 The dimensions and weights of pipes and sockets and tolerances shall be as prescribed in Appendix ‘C’ page 92 of CPWD Specifications-1996 (Vol-VI).

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21.4 All screwed tubes and sockets shall have pipe threads confirming to the requirements of IS:554. Screwed tubes shall have taper threads while the sockets shall have parallel threads.

21.5 All tubes shall withstand a test pressure of 50 Kg./sq.cm without showing defects of any kind.

21.6 Fitting: - The fittings shall be of mild steel tubular or wrought steel fittings confirming to IS:1239 (Part-II) or as specified. The fittings shall be designated by the respective nominal bores of the pipes for which they are intended.

Note: - Storage, cutting, jointing, making of trenches, laying of pipe line in trenches, testing of hydrostatic pressure and leakage of pipes & back filling of trenches & measurements shall be done as per CPWD Specifications-1996 (Vol-VI) duly updated.

22.0 BRASS/GUN METAL VALVES:The sluice valves are used in the pipe line for controlling or stopping of flow of water. These shall be of specified size and class and shall be of inside non-raising screws either double flange or double socket ends and cap or hand wheels. These shall in all respect s comply with the Indian standard specifications IS: 780 for valves up to and including 300mm size and IS: 2906 for valves above 300mm size. Class I sluice valves are used for maximum working pressure of 10Kg/sqcm (100m head) and class II sluice valves for 15 Kg/sqcm (150m head) The body domes, covers ,wedge gates & stuffing box shall be of good quality cast Iron, the spindle of the bronze, the nuts & the valve seats of the leaded tin bronze . The bodies , spindles & the other parts shall be truly machined with surface smoothly finished. The area of the waterway of the fitting shall be not less than the area equal to the nominal bore of the pipe. The valve shall be marked with an arrow to show the direction of turn for closing of valve.

23.0 STONE WARE ,PIPE & FITTING23.1 All pipes with spigot and socket ends and fittings shall conform to IS:

651. These shall be sound, free from visible defects such as fire cracks or hair cracks. The glaze of the pipe shall be free from crazing. The pipes shall give a sharp clear tone when struck with a light hammer. There shall be no broken blisters. the thickness of pipe shall be as given in the table below:

STONE WARE PIPESInternal Diameter

(mm)

Thickness of theBarrel and the socket

(mm)100 12

150 16

200 17

12

230 19

250 20

300 25

350 30

400 35

450 38

The length of the pipe shall be 60,75,90 cm exclusive of the internal depth of the socket. The pipes shall be handled with sufficient care to avoid damage to them.

24.0 LAYING & JOINTING OF STONE WARE PIPES & MEASUREMENT

Shall be constructed as per Para 21.7 of CPWD Specification 1996 (Vol-VI) duly updated.

25.0 MAN-HOLES: - Shall be constructed as per Para 21.12 of CPWD Specification- 1996 (Vol-VI) duly updated

26.0 SEPTIC TANKS: - Shall be constructed as per Para 21.12 of CPWD Specification-1996 (Vol-VI) duly updated.

27.0 SOAKAGE PITS: - Shall be constructed as per Para 21.13 of CPWD Specification-1996 (Vol-VI) duly updated

28.0 All other relevant IS codes shall be applicable for completion of work.29.0 The Railway / IRCON reserves the right to reject of alter any part of the

work executed by the Contractor which in the judgement of the Railway / IRCON does not comply with the requirements of the above specifications. The decision of the Railway / IRCON shall be final and conclusive for all purpose and contractor shall have no claim on this account whatsoever.

30.0 GRANULAR SUB-BASE30.1 The work shall be carried out as per clause no. 401 of MOST/MORTH-

2001 specification and as shown in the approved drawings. The work consist of laying and compacting well graded material to the specified thickness as per approved drawings on prepared sub grade in accordance with the requirement specified in the specification in clause 401 of MOST/MORTH-2001 or as directed by Engineer-in-charge.

30.2 The material to be used for the work shall be natural sand, moorum, gravel, crushed stone etc. depending upon grading required. The grading requirement and the physical properties of various materials to be used in

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the work shall conform to the relevant specification of MOST/MORTH -2001 under section 401.

30.3 The sub base material of approved grading shall be spread on the prepared sub grade with the help of a motor grader of adequate capacity and shall be compacted with smooth wheeled roller of 80 to 100 KN as per clause 401.4.2 of MOST/MORTH-2001 under section 401. The quality control and payment shall be made as per clause no. 903.3.1 under section 900 & clause no. 401.7 of MOST/MORTH-2001 under section 401 respectively. No extra payment shall be made towards Laboratory Testing.

30.4 Payment for GSB shall be made as per relevant item of BOQ on volume basis worked out as per cross-sectional area of compacted thickness as per approved drawings.

31.0 ANCILLARY WORKSAll other ancillary works and works incidental to main works shall be carried out as per codes of practices and manual of instructions of Railways and as per the instructions of Engineer-in-charge.

For and on behalf ofIRCON INTERNATIONAL LIMITED.

Signature ………………………………..Designation: General Manager/Track

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