Bengaluru Water Supply And Sewerage Board Tender

no4 - Earth work excavation for pipeline trenches in all kinds of soils by mechanical means above 600 mm trench width as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & boning rods at every 100 mm whevere necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work etc., and all other appurtenances complete in the following strata. All kinds of soils. Depth exceeding 4.5m but not exceeding 6.0 mtr ,

no5 - Earth work excavation for pipeline trenches by mechanical means as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & bonding rods at every 100 mm wherever necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work and all other appurtenances to complete in the following strata. Hard rock (blasting prohibited) Depth exceeding 1.5 m, but not exceeding 3m

no6 - Earth work excavation for pipeline trenches by mechanical means as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & bonding rods at every 100 mm wherever necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work and all other appurtenances to complete in the following strata. Hard rock (blasting prohibited) Depth exceeding 3.0 m, but not exceeding 4.5m

no7 - Earth work excavation for pipeline trenches by mechanical means as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & bonding rods at every 100 mm wherever necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work and all other appurtenances to complete in the following strata. Hard rock (blasting prohibited) Depth exceeding 4.5 m, but not exceeding 6.0m

no8 - Providing and laying in position Cement Concrete for levelling course for all works in foundation. The granite/trap/basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed, laid in layers not exceeding 150 mm thickness, well compacted using plate vibrators, including all lead & lifts, cost of all materials of quality, labour, Usage charges of machinery, curing, and all the other appurtenances required to complete the work as per technical specifications Mix 1:3:6 Using 40 mm nominal size graded crushed crushed coarse aggregates

no9 - Providing and laying in Cement Concrete for all Basement & surface level works, return walls, retaining walls, sunken floors etc. The granite/trap/ basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers, laid in layers, well compacted using needle vibrators, providing weep holes wherever necessary, including all lead & lifts, cost of all materials of quality, labour, Usage charges of machinery, curing and all other appurtenances required to complete the work as per technical specifications. M25 design mix Using 20 mm nominal size graded crushed crushed coarse aggregates

no10 - Percentage additionalities for Formwork, Centering & Scaffolding - Additional percentage to be added to the finished rates of concrete of buildings, Irrigation works, Water supply works, Road & Bridges depending upon the type of structure

no11 - Refilling available earth around trenches/pipelines, cables in layers not exceeding 20 cms in depth, compacting each deposited layer by ramming after watering with a lead upto 50 m , and lift upto 1.5 m. Including cost of all labour complete as per specifications

no12 - Supplying, fitting and placing TMT FE 550 / 550D Steel Reinforcement including cost of all materials, machinery, labour, cleaning, straightening, cutting, bending, hooking, laping/welding joints, tying with binding wire / soft annealed steel wire and other ancilary operations complete as per drawing and technical specification.

no13 - Removal of Unserviceable Soil with Disposal upto a suitable distance as directed by the Engineer incharge of work

no14 - Dewatering the sewage / storm water by using reqired HP submersible pump for the diversion of storm / sewage during the execution of work Considering for one Pump. 10HP pump

no15 - Providing and fixing MS ladder between landings, 45 cms wide using angle iron of specified sizes, 20mm MS bars at 25 cms. centre to centre, with necessary supports of same angle iron etc. as directed, including hand railing on both sides with 25mm dia. GI pipes with angle iron props at 2 mtrs. intervals and 0.5M heigh, including fixing in ground with CC 1:2:4 and two coats of anticorrosive bituminous paint etc. with all lead and lifts etc. complete with: MS angle of 65x65x10mm

no16 - Manufacturing, providing, trasporting, rolling, lowering, laying, jointing & testing and commissioning of MS specials of minimum 8mm thick such as bends, tail pieces, reduces etc. conforming to IS-7322:1985 with latest amendments and including perfect linking and welding of joints to correct position includng cost and conveyance of materials with all lead and lifts, cost all labour and giving satisfactory hydraulic test as per IS:3589:2001 with latest amendments for test pressure and working pressure both at factory and site etc. complete as per detailed specifications with inside lining two coat of food grade epoxy painting of approved make with Each coat of 250 micron thick (after dry) over one coat of food grade epoxy primer of approved make with minium of 50 micron thick (after dry) and outside 25mm thick coating in CM 1:3 by providing 50x50mm weld mesh including loading and unloading of the pipes for the following category to suit PSC / MS / CI / AC / DI / PVC pipes. The weight of MS shell only by considered before lining and coating for arriving at the rate. The thickness of plate will be specified by the engineer. (Contractor will make his own arrangements for procuring water for testing for: Note: 1) For small works where the C.M. lining is not practicable for inside surface of the pipe, food grade expoxy painting of two coat over one coat of epoxy primer may be proposed and got approved. 2) The above rates are applicable only for pipe works etc complete Pipe bends,branches, tail pieces, reducers etc. for above 500mm dia pipes

no17 - Ductile iron Double flanged Butterfly valve with Gear Box and electrically operated Actuator: DOUBLE ECCENTRIC BUTTERFLY VALVE DN1800mm, PN16 Butterfly valves shall be of double eccentric and resilient seated type generally as per BS EN 593, BS 5155 and IS 13095. Face-to-face dimension according to EN 558 Table 2 Basic Series 13 and flange drilling to IS 1538/ IS 9523/ EN1092-2 (ISO 7005-2), PN 10/16/25. Valve body and disc shall be Ductile Cast Iron EN-GJS-500-7 to BS EN 1563 and designed with tilted disc which shall release the compression of the disc sealing after a few degrees of opening, which extends the durability and gives low operating torques. The disc shall fix to the shaft to prevent wear and fluttering. The valve seat shall be of integral body design. When the valve is fully closed the seal shall seat firmly to prevent leakage. The seat surfaces shall be epoxying coated ductile iron seat integrated in the body for smooth movement of disc and to provide a long life for the seat. Seal retainer ring shall be of epoxy coated steel. The disc seal profile and rubber quality shall ensure low closing torques and all rubber parts shall be approved from DVGW, WRAS, KIWA or ACS. The valve Shaft of stainless steel with self-lubricating bearings. The shaft ends shall be fully encapsulated in the disc and are fixed with dowels corrosion protected with O-rings and a stainless steel security plate. shaft sealing shall be replaceable two EPDM O-rings on each side of a bronze bushing and a flat NBR gasket. Body and disc shall be fusion bonded epoxy to DIN 30677-2, GSK approved, RAL 5017. All the valves shall be hydraulically tested as per IS 13095 / EN 1074-1 and 2 / EN 12266. Material of construction of butterfly valves shall comply with following requirements: Body and Disc Spheroid Graphite Iron IS 1865 Gr 500/7 / Ductile Iron EN-GJS-500-7 to BS EN 1563 Key SS ISO 3506; Grade A2 Drive Shaft SS EN 10088-1;(W1.4021)/ASTM A276-420 Bearing PTFE Lined Stainless stee O-Ring and Gasket EPDM (WRC) Screw SS ISO 3506;Grade A2 Cover SS EN 10088-1;(W1.4301)/ASTM A276-304 End Cover SS EN 10088-1;(W1.4057)/ASTM A276-431 Screw SS ISO 3506; Grade A2 Stub Shaft SS EN 10088-1; (W1.4021)/ASTM A276-420 Spacer Alu Bronze BS 1400; AB1 Axial bearing Bronze BS 1400; LG2 End Plate Ductile iron EN-GJS-500-7 to BS EN1563 Washer and Bolt SS ISO 3506; Grade A2 Coating Electrostatically with min thickness 250 microns (blue) Butterfly valves shall be suitable for mounting in any position. The valve shall be free from induced vibrations.