Provision for installation of Ductile Iron underground pipe line from Municipal water supply line to underground water tank at Anushakti Abasan, 1AF, Bidhannagar, Kolkata-64

Amount

Dismantling & Demolishing (approx thickness 20mm) plain cement concrete, bituminous road etc. stacking of serviceable materials, by chiselling at all level and location, disposal of unserviceable materials outside Anushakti Abasan etc all complete as per specification and as directed.

(a) In plain cement concrete 1:3:6 / 1:2:4

Earth work in excavation in all sorts of soil, reclaimed clay / sand etc. other than soft and hard rock up to depth not exceeding 1.50 m from ground level including removing, spreading or stacking the spoils within a lead of 150 m and backfilling trench sides, plinth etc. spreading in layer not exceeding 250mm thick, watering, ramming by manually or mechanically as directed. The item includes necessary trimming, the sides of trenches, leveling, shoring, dressing and ramming the bottom, bailing out water by dewatering pump if necessary etc. complete as per specification, drawing and as directed by the Engineer-in-Charge.

Providing 75mm thick flat brick soling in single layers with well burnt brick of approved manufacturer and of class designation 7.50 (classification as per IS 1077 -1992 and min. average compression strength not less than 7.50 N/ mm2) at all locations of sub base to floor and in plinth protection and below foundation laid flat to required level slopes etc. as directed including binding the interstices with approved quality sand including watering and pointing with cement mortar 1: 6 finish curing etc. complete as per specification, drawing and as directed by the Engineer-in-Charge.

Providing and laying Ductile Iron Pipes Class K-7 conforming to IS : 8329 with necessary specials like bend, “T” etc. by push on joints ensuring leak proof ness in proper line, level and location etc. all complete as per direction of EIC. Note: Push on joint will be paid in relevant item.

a) 100mm dia

Providing push-on-joints to Ductile Iron Pipes including necessary rubber Gaskets, testing of joints etc. all complete as per direction of EIC.

a) 100 mm dia

Providing and laying plain cement concrete (PCC) at all level, location, using graded stone aggregate 20mm maximum size including mixing, conveying, placing, consolidation, finishing, dewatering if necessary, curing, necessary scaffolding, form work, including dismantling and disposing of old damaged concrete etc. all complete as directed.

a) Plain Cement Concrete (1:2:4)

C.I. sluice valve with flanged ends drilled to as per I.S. 1358/62 and having all cast iron components as per I.S. 780/71 solid forged bronze inside screw spindle having ultimate tensile strength not less than 4.72 MT per sq. cm. Spindle nut valve and seat faces of hard wear resisting, manufactured from best quality gunmetal conforming to I.S. 780/71,painted black all over with asphalt base paint tested to 21 kg (hydraulic pressure) per sq. cm., valve opening to anticlockwise direction, fitted and fixed complete.

a) 100 mm dia

Sluice valve chamber with C.I. heavy cover with locking arrangement, (weight not less than 25 kg) (size of chamber 450 mm X 600 mm inside upto 900 mm depth) 250 mm thick cement brick walls (6:1), 150 mm thick cement concrete (6:3:1) bed with stone chips, 20 mm thick cement plaster (6:1) for inside wall and 15 mm thick cement plaster (4:1) for outer walls including rounding corners.

Refixing of paving block after careful removal of blocks, sand etc. shifting materials safely to the desired location, preparing surface, compaction by roller application, providing additional quantity of sand if required, relaying of blocks, cutting to sizes if required to match with existing design and level, laying of PCC (1:2:4) at the edges for confinement if required etc. all complete and as directed by EIC. Note : Quantity for PCC will be paid in different item.

Supplying, fitting and fixing brass ferrule including connection with G.I. pipes of TATA make of following dia. and upto 450 mm long with screw, jamnut, sockets etc., all complete in all respect, including cutting trenches in all sorts of soil and filling up the trenches as per direction of the Engineer - in - Charge

A) 25mm dia.