tender for 1.construction for 30,000 litres capacity oht - 12m staging height at maharajapuram habitation in thirumakkottai panchayat at kottur block in tiruvaur district .ktr/capital grand fund 2025-26 package no : 03; 1. construction for 30,000 litres capacity oht - 12m staging height @ maharajapuram habitation in thirumakkottai panchayat 2 earth work excavation & depositing on bank with an initial lead of 10 metre & initial lift of 2 metre in hard shift clay, stiff block cotton, hard red earth shales, murrum, gravel, stoney earth, and earth mixed with small size boulders and hard gravelly soil (ss 20b) for foundation including shoring, strutting, baling out water providing danger light wherever necessary depositing the surplus earth on bank and other incedential charges etc., complete and as directed by twad board officers 3 first depth of 0 to 2 m 4 second depth of 2m to 3m 5 supplying and filling foundation and basement with filling sand in layers not more than 15cm . thick well ramed, watered and compacted complete complying with stanard specification. 6 cement concrete 1:4:8 mix using 40mm hbg metal including cost and conveyance of all materials and all labour chages etc., complete 7 reinforced cement concrete mix m30 grade using 10mm & 20mm hard blue granite broken stone (machine crushed) excluding the cost of rts rods for reinforcement and centering, strutting, shuttering but including cost of all materials mixing, laying, vibrating the concrete with mechanical vibrators, ramming, consolidating, finishing and curing etc., complete and as directed by the twad board officers. 8 below 1.5m from gl 9 0m to 1.50m below gl 10 0m to 4.50m above gl 11 4.50 m to 7.32 m above gl 12 7.32 m to 10.98 m above gl 13 10.98 m to 14.64 m above gl 14 14.64 m to 18.30 m above gl 15 supply and erection of steel centering, shuttering for soffits and sides including necessary supports and strutting for all rcc works using ms sheets of suitable size of bg10 stiffened with ms angle of size 25 x 25 x 3 mm for boarding laid over i type ms truss of size 25 x 25 x 3mm about 90cm c/c and supported by 40mm gi pipes (medium) spaced at 75cm c/c etc complete and as directed by the twad board officers. 16 below gl 17 from gl to 3.30m 18 from 5.30m to 6.30m above gl 19 from 8.30m to 9.30m above gl 20 from 11.30m to 12.30m 21 square column below gl and upto 3.30m above gl 22 3.31m to 4.30m ht 23 4.31m to 5.30m ht 24 5.31m to 6.30m ht 25 6.31m to 7.30m ht 26 7.31m to 8.30m ht 27 8.31m to 9.30m ht 28 9.31m to 10.30m ht 29 10.31m to 11.30m ht 30 11.31m to 12.30m ht 31 curved surface - upto 3.30m ht. 11.30m to 12.30m 32 12.30m to 13.30m 33 13.30m to 14.30m 34 14.30m to 15.30m 35 supplying, cutting, bending, tying, fabricating and placing in position of steel rods for all rcc works including cost of steel and binding wire etc.( the steel should conform to the relevant isspecification and supplied with test certificate fe. 415 grade as per is specification no.1786/1985 and as amended from time to time) delivery at site of work including loading, freight, unloading, stacking, transit insurance charges, taxes etc. complete.and as directed by the twad board officers. 36 painting two coats with approved cement paint over one priming coat of white cement over cement plastered wall surface and ceiling including cleaning preparing the surface and curing etc., complete (using cement paint of colour as approved by the departmental officer) and as directed by the twad board officers. 37 supply and delivery and fixing of outside ms ladder of 45cm clear wide made out of 50 mm x 50mm x 6mm ms angle for sides and steps in 16 mm ms plain rods fixed at 30cm c/c welded jointed etc ., providing with suitable side supports, clamps and locking arrangements provided with two coats of approved enamel paint over one coat of redoxide paint , for providing access to roof top of 20000 litres oht of suitable inclined length , including bottom anchorage and transportation and as directed by twad board officers. the rate includes concrete bed block in cc 1:2:4 using 20mm hbgs at top and bottom of suitable size with necessry anchor bolts. 38 providing and fixing of alumnium ladder 3m height folding type etc. to required height and clear width of 45 cm consisting of 2 nos. of vertical post of 10 cm x 15 cm and step slab of 25mm x 25mm etc.complete and as directed by twad board officers. 39 providing 110mm pvc vent cowl arrangements mosquito proof nylon net and as directed by twad board officers 40 supply and fixing of cut stone of size 0.30m x 0.30m x 0.15m in cm 1;3(one cement and three sand) below inlet pipe for service reservoir as directed by twad board officers. 41 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 42 painting twad board emblem on the service reservoir with enamal paint as per boards specification and as directed by twad board officers. 43 pipe connection arrangements for inlet,outlet,scour and overflow etc. including cost of pipes,specials,valve,labour charges for lifting, aligning, cutting, threading ,fixing and painting of gi pipes with two coats of approved quality enamal paint etc. complete as detailed below. 44 65mm gi pipes for inlet connection 45 65mm gi pipes for over flow & rain water harvesting pipe 46 50mm gi pipes for scour pipe 47 65mm gi pipe for delivery pipe 48 90mm pvc threaded coupler 49 63mm pvc threaded coupler 50 65mm dia gi tee 51 65mm dia gi bend 90 52 65mm dia gi bend (short) 53 65mm gi coupler 54 65mm gi union 55 65mm gi elbow 56 50mm gi union 57 50mm gi elbow 58 65mm gi tee 59 65x50mm gi reducer 60 75mmx63mm pvc reducer 61 65mm gm gate valve 62 50mm gm gate valve 63 63 mm pvc 4ksc pipe 64 refilling the foundation with excavated earth including consolidation as directed by the twad board officers 65 providing hand rails over the roof slab by using 32 mm gi pipe with 40mm x 6mm ms flat and fixied with 12mm dia fastner bolt 75mm long and as directed by twad bd officers 66 labour charges for gi pipe connection to the oht, for inlet, outlet, overflow and scour arrangements including cutting and threading, earth work excavation & refilling. 67 provision for water metre 50mm charges(10147+3291+3817) 68 provision for soak pit arrangementss 69 provision for extension pipe line (sub estimate) 70 earth work excavation of and depositing on bank with intital leadof 10mtr. & initial liftof 2mtr inhard stiff clay stiff black cotton soils, stiff re earth, shales murrams, gravel stoney earathand darth mixed with 50% fair sized boulders and hard gravelly soils. 71 supply & devliery of pvc rigid pipes for potable water supply as per is 4935/1988 and aa amended fro time to time with isi marking of othe following sizes with necessary couplers or bel ended pipes as specified in isi and the required quantity of solvent cement having the required woring pressure and for delivery at site of works including loading, unloading stacking and transit insurance charges etc.,complete (4kgs) 72 refilling with excavated earth (other than sand complying with standard specification for filling in trenches. 73 conveyance of pvc rigid pipes and lowering into the trenchlaying to proper gradian and alignment, jointing pvc couplers with solvent cement and testing to required pressure including conveyance of water into one k.m. lead for filling in the pipes excluding cost of materials which will be supplied. 74 solvent cement 75 63mm pvc tee 76 63mm pvc elbow 77 63mm pvc end cap