tender for construction of 60000 litre capacity over head tank1 nosworks under15 thfinancecommission (bp)- 2025 - 26 - nilakkottaiblock - tn-05-02; 1.construction of 60,000 litres capacityoht (12.0 m staging)@ koothampattyh/o pachamalayankottai est rs 21.80lakhs 2 earth work excavation for foundation in all soils and sub soils to full depth etc., ordinary soil complete in hard stiff clay, stiff black cotton soil, hard red earth, sales, murrams, gravel, stoney earth, earth mixed with small sized boulders and hard gravelly soil s.s.20b 3 first depth of 0 to 2 m 4 second depth of 2.0m to 3.0 m 5 supplying and filling in foundation, basement, etc with filling m.sand 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. 6 cement concrete 1:4:8 (one cement, four m.sand and eight hard broken stone jelly) using 40 mm gauge hard broken granite stone jelly for foundationincluding 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 7 cement concrete 1:1-1/2:3 (one cement, one and a half crushed stone m.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 m.sand) and kraft paper laid over it without claiming extra, etc., complete complying with standard specification and as directed by the departmental officers 8 below 1.5m from gl 9 0m to 1.50m below gl 10 0m to 1.00m above gl 11 1.00m to 4.50m above gl 12 4.50 m to 7.32 m above gl 13 7.32 m to 10.98 m above gl 14 10.98 m to 14.64 m above gl 15 14.64 m to 18.30 m above gl 16 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) 17 for plan surface 18 below gl 19 from gl to 3.30m 20 from 3.31m to 4.30m 21 from 5.31m to 6.30m 22 from 6.31m to 7.30m 23 from 8.31m to 9.30m 24 from 9.31m to 10.30m 25 from 11.31m to 12.30m 26 square column: 27 square column below gl and upto 3.30m above gl 28 3.31m to 4.30m ht 29 4.31m to 5.30m ht 30 5.31m to 6.30m ht 31 6.31m to 7.30m ht 32 7.31m to 8.30m ht 33 8.31m to 9.30m ht 34 9.31m to 10.30m ht 35 10.31m to 11.30m ht 36 11.31m to 12.30m ht 37 curved surface 38 curved surface - upto 3.30m ht. 39 curved surface - 3.30m to 4.30m ht. 40 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) 41 painting two coats of newly plastered wall surface with ready mixed plastic emulsion paint of first class quality and of approved colour over a priming coat including thorough scrapping, clean removal of dirt, and including necessary plaster of paris putty, wherever required etc., complete complying with standard specification. 42 providing outside m.s ladder of 45cm wide made out of 50x50x6mm ms angle for sides and stepsfixed at 30 cm centre to centre etc.and providing of landing slabs with hand rails using32mm gi pipe and 40mmx6mm ms flat etc. as per approved design 43 providing and fixing of rcc inner access ladder in rcc 1:1.5:3 (one cement, one and half sand and three aggregates) using 20mm hbg stone for oht including cost of reinforcement, placing grill in position, centering shuttering charges, mixing concrete curing etc., 44 providinggi ventilation arrangement 2 nos mosquito proof nylon net with 65 mm gi pipe and spls as directed by thetwad board officers 1 m 65 mm gi pipe, 4 nos 65 mm gi elbow , 4nos cutting and 8 nos threading and 2 nos65 mm gi tee 45 providing cut stone slab in cm 1:3 of size 0.3 m x 0.3 m x 0.15 m and as directed by twad board officers 46 providing manhole cover of size 0.60 x 0.60m in rcc 1:1.5:3 with suitable reinforcement and 50x50x6mm ms angle fixed along edges and as directed by twad board officers 47 provisions for pipe connection arrangements for inlet & outlet scour and overflow etc.,cincluding cost of pipes, specials, valve, labour charges for lifting , aligning, cutting,threading,fixing and painting of gi pipes with two coat of approved quality enamel paint etc.,complete 48 50mm gi pipe 49 50mm gi coupling 50 50mm gi elbow 51 50mm gi union 52 50mm gi hex nipple 53 50mm gm gate valve 54 50mm gi tee 55 65mm dia gi pipes 56 65mm dia gi tee 57 65mm dia gi elbow 58 65mm dia gm gate valve 59 65mm dia gi coupling 60 65mm gi dummy(heavy) 61 supply of90mm dia pvc pipe 4 kgs 62 earthwork excavation for hard stiff clay and hard rock earth and pipe laying, jointing and refilling the trench with excavation soilsforwater line 63 refilling the foundation with excavated earth including consolidation as directed by the twad board officers 64 towards the cost of providing name boardincluding cost and conveyance of all materials and all labour charges etc.,complete