REVAMPING CIVIL INFRASTRUCTURE FOR PROVIDING CONCRETE FLOORING AT CHERANMAHADEVI DEPOT

Towards hire charges for JCB including driver beta etc.,complying with standard specification and as directed by the departmental officers

Earth work excavation for foundation in all soils and sub-soils and to full depth as may be directed except in rock requiring blasting inclusive of shoring shuttering, bailing out water wherever necessary and depositing the surplus earth within the compound in places shown by the departmental officers with an initial lead of 10 mts and initial lift of 2 mts. and clearing and levelling the site, etc., complete complying with standard specification.

Cement concrete 1:4:8 mix using 40mm ISS metal including cost and conveyance of all materials to site and all labour charges for mixing, laying, and curing etc.

Random rubble masonry in cement mortar 1:5 mix with simultaneous pointing including cost and conveyance of all materials to site and all labour charges etc

Supplying, fabricating and placing in position Mild Steel / Ribbed Tor Steel grills for all RCC works as per design given including cost of steel and G.I. binding wire in all floors etc. complete complying with standard specification. (Contractor has to make his own arrangements for the supply of steel and binding wire)

Supplying and erecting steel centering including necessary supports for plane surfaces for Reinforced Cement Concrete works such as column footings, column pedestals, plinth beams, grade beams, staircase steps, etc. which require only nominal strutting using mild steel sheets of size 90cm x 60cm and 10 BG stiffened with welded mild steel angles of size 25mm x 25mm x 3 mm for boarding, laid over silver oak joists of size 10cm x 6.5cm spaced at about 75cm centre to centre or at suitable intervals etc. complete in all floors complying with standard specifcation. (Payment for centering shall be given after the concrete is laid)

Cement concrete 1:2:4 mix using 20mm ISS metal including cost and conveyance of all materials to site and all labour charges for mixing, laying, and curing etc.

Supply and filling in foundation and basement with gravel in layers of well rammed watered and compacted with surface vibrator, watered and consolidated etc., complete complying with standard specification and as directed by the departmental officers.

Construction of Granular sub-base of 300mm compacted thickness ( Drainage Layer botom most) by providing laying, spreading and compacting of Open graded Material conforming to Grading III of Table 400-1 of MORTH clause 401 ,mixing in a Wet Mix Plant of 200 tonne capacity at OMC, carriage of mixed material to work site, spreading in uniform layers with motor grader on prepared surface and compacting with vibratory roller 8-10 tonne to achieve the desired density of 98% including protection of edges of GSB layer, cost of all materials, labour, hire charges of machinery, lighting, guarding, barricading, maintenance of diversion road, loading & unloading, all lead and lift etc., to achieve minimum CBR value of 30%(Compacted Thickness) in accordance with MORT&H technical specification clause No. 401 and with all other incidental charges and as per the direction of the Engineer-In-Charge of work

Supplying and fixing the Bitumen felt pad 12 mm thick pad etc., complete complying with standard specification and as directed by the departmental officers.

Providing and laying in position, Standardised Concrete Mix M-20 Grade in accordance with IS:456-2000, using 20mm and down graded hard broken granite stone jelly for all RCC items of works with minimum cement content of 325 kg/mᶾ and maximum water cement ratio of 0.55, including admixture (plasticiser / super plasticiser) in recommended proportions as per IS:9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability with about (5 cu.m.) 7730 kg. of 20mm machine crushed stone jelly and with about (3.3 cu.m.) 5156 kg. of 10-12mm machine crushed stone jelly and with about (4.79 cu.m.) 7670 kg. of M sand, but excluding cost of reinforcement grill and fabricating charges, centering and shuttering and also including laying, vibrating with mechanical vibrators, finishing, curing, etc. and providing fixtures like fan clamps in the RCC floor/ roof slabs wherever necessary without claiming extra, etc., complete complying with standard specification and as directed by the departmental officers. The coarse and fine aggregates to be used should comply with the requirements of IS Standards. (No separate payment will be made by the Department for the excess usage of materials).

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