tender for providing entrance arch arrangements of inspection bungalow in tirupathur- 1 earth work open excavation and depositing on banks with initial lead of 10 m and initial lift of 2 m in all soils and sub-soils such as sand silt or other loose soils wet sand or silt not under water , light black cottoncomplying with standard specification 2 supplying and filling in foundation, basement, etc with sand and quarry rubbish in layers of not more than 15 cm thick well watered, rammed and consolidated etc. complete complying with standard specification and as directed by the departmental officers. 3 cement concrete 1:5:10 (one cement, five crushed stone sand and ten hard broken stone jelly) using 40 mm gauge hard broken granite stone jelly for foundationand flooring including dewatering wherever necessary and laid in layers of not more than 15 cm thick well rammed, consolidated and curing etc. complete complying with standard specification 4 supplying and erecting steel strutting 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 oakjoists 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) 5 supplying and erecting centering for sides and soffits including necessary supports and strutting upto 3.29 m height for plane surfaces as detailed below in all floors with all cross bracings using mild steel sheets of size 90 x 60 cm and 10 bg stiffened with welded mild steel angle of size 25mm x 25mm x 3 mm for boarding laid over silver oak joists of size 10cm x 6.50 cm spaced at abote 90 cm centre to centre and supported by casurina props of 10cm to 13 cm dia spaced at not more than 75 cm centre to centre etc. complete complying with the standard specificaiton. (payment for centering shall be given after the concrete is laid) 6 for plane surfaces such as rcc floor slab, roof slab, beams, lintels, bed blocks, landing slab, waist slab, portico slabs and beams, etc. 7 for plane surfaces such asrectangular or square rcc columns, sunshades, top and bottom slab of rcc boxing, etc. 8 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 c with minimum cement content of 325kg/m3 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) 7730kg of 20mm machine crushed stone jelly and with about (3.3cu.m) 5156 kg of 10-12mm machine crushed stone jelly and with about (4.79cu.m)7670kg of 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 stanard 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). 9 in foundation and basement 10 in ground floor 11 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)