NNT Scheme 2022-2023

Amount

Earthwork excavation for foundation in all soils and to the full depth as may be directed except hard rock not requiring blasting inclusive of shoring , shuttering and baling of water wherever necessary refilling the side s of foundation with excavated earth in layers of 15cm thick well rammed and compacted depositing the surplus earth in places shown by the Departmental Officers with initial lead of 10 Metre and lift of 2 Metre and clearing and leveling the site etc., complete. as per SS 20B TNDSS No.23&24VI(S2) VII 9,10

Plain cement concrete 1:4:8 mix using 40mm size ISS gauge HBG Machine Crushed metal for foundation including cost and conveyance of all materials including cost and conveyance of materials to site and all labour charges for mixing, laying, ramming curing concrete et complete as per standard specification. TNDSS No.28 V,VI(S2) V,VI(S5A) VII

Supplying erecting and centering for sides and soffits including supports and strutting up to 3.29mm height for plane surface in all floors with cross bracings using mild steel sheets of size 30 cm x 55cm and 10 gauge stiffened welded with mild steel sheets of size 25mm x 25mm x 3mm for boarding and laid over silver oak (country wood) joists, of size 10cm x 6.5cm dia spaced at about 90cm centre to centre and supported by casurina props of 10 cm to 13 cm dia spaced at 75 cm centre to centre etc complete complying with standard specification TNDSS No:30&86

Plain cement concrete 1:2:4 mix using 20mm size ISS gauge HBG Machine Crushed metal for foundation including cost and conveyance of all materials including cost and conveyance of materials to site and all labour charges for mixing, laying, ramming curing concrete et complete as per standard specification. TNDSS No.28 V,VI(S2) V,VI(S5A) VII

Supplying and filling with Well gravel from approved quarry including cost and conveyance of all materials and all labour charges for filling, watering & consolidation etc., complete as per standard specification 24 &25 NBC Part VI (S2) 8 28 V,VI S25

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)

Reinforce Cement Concrete 1:1-1/2:3 (One Cement, One and a half sand and Three hard broken stone jelly) using 20 mm gauge hard broken granite stone jelly for all RCC items of works excluding cost of reinforcement grill and fabricating charges centering and shuttering but including laying, vibrating with mechanical vibrators, finishing, curing, etc. and providing fixtures like fan clamps in the RCC floor / roof slabs wherever necessary and bearing surfaces of walls, beams etc. shall be finished smooth with Cement Mortar 1:3 (One Cement and Three Sand) and kraft paper laid over it without claiming extra, etc., complete complying with standard specification and as directed by the departmental officers

K.SIVAKUMAR