Construction of 100000 Litre Overhead tank at Ratsasakinaru in Koodankulam village Panchayat of Radhapuram Panchayat

Construction of 100000 Liter OHT (12 m Staging Height )

Earthwork excavation for foundation (for narrow excavation) to full depth as per designed in all soils and sub soils except soft disintegrated rock not requiring blasting and hard rock requiring blasting and bailing water wherever necessary. Refilling the sides of foundation with excavated earth other than sand in layers of well rammed and compacted and depositing the surplus earth in places shown by the departmental officers with an initial lead of 10m and initial lift of 2m and clearing and leveling the site etc.complete complying with standard specification.

First Ddepth of 2m

Second depth of 1m

Sand filling for foundation with clear river sand including cost of sand watering, ramming and consolidation etc complete as directed by TWAD Board officers.

Cement Concrete 1:4:8 (One Cement, Four crushed stone sand and Eight hard broken stone jelly) using 40 mm gauge hard broken granite stone jelly for foundation including dewatering wherever necessary and laid in layers of not more than 15 cm thick well rammed, consolidated and including curing etc. complete complying with standard specification and as directed by the departmental officers -Mixing by mechanical means for 10 cum.

Providing and laying in position, standardised concrete Mix M-20 Grade in accordance with IS 456 using 20mm and down graded hard broken granite stone jelly for all RCC items of works with minimum cement content of 325 kg/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.) 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 crushed stone 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).

For items 1.5m to 4.5m below GL

Above G.L upto 4.50 ht

Column 4.50m to 7.32m ht above G.L

column 7.32m to 10.98m ht above G.L

column 10.98m to 14.64m ht above G.L

column 14.64m to 18.63m ht above G.L

Supplying and erecting centering shuttering including necessary supports for plane surface in foundation and basement and in all floors for R C C column footing column plinth beam, beams, roof slabs, staircase steps, bed blocks, critical pier etc using mild steel sheets of size 90 x 60 cm and 10 guage stiffened, welded with mild steel angles of size 25mmx25mmx3mm for boarding laid over silver oak (country wood) scantlings of size 10cm x 6.5cm spaced of about 90cm centre to centre and supported by casurina props of 10cm to 13cm dia spaced at 75cm centre to centre complete complying with standard specifications and as directed by departmental officers including conveyance of all materials to site and proper centering etc complete.

For Plan surface

From G.l upto 3.3m ht

From 3.3m to 4.3m ht

From7.30m to 8.30m ht

From 11.30m to 12.30m ht

Curved Surface

Upto 3.30m ht from Floor Level

From 11.30m to 12.30m ht from floor level

Square column

Upto 3.30m ht

From 3.30m to 4.30m ht

From 4.30m to 5.30m ht

From 5.30m to 6.30m ht

From 6.30m to 7.30m ht

From 7.30m to 8.30m ht

From 8.30m to 9.30m ht

From 9.30m to10.30m ht

From10.30m to 11.30m ht

From 11.30m to 12.30m ht

Circular column

Upto 3.30m ht

From 3.30m to 4.30m ht

From 4.30m to 5.30m ht

From 5.30m to 6.30m ht

From 6.30m to 7.30m ht

From 7.30m to 8.30m ht

From 8.30m to 9.30m ht

From 9.30m to10.30m ht

From10.30m to 11.30m ht

Painting two coats of newly plastered wall surface with ready mixed plastic Exterior 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 and as directed by the departmental officers.

Steel - Fe 500D : Supply, fabrication and placing of reinforcement steel of high yield strength ribbed bars of various diameters and grade conforming to IS 1786 for reinforced concrete work. The work includes recoiling, straightening, cutting, bending, fabricating, and placing in position, at all levels including lead and lift, according to drawings, specifications etc. complete and supply & use of 18G black annealed binding wire double fold to tie the bars in position and providing precast cement/ PVC cover blocks for main reinforcement to ensure specified cover and complete., including all labor charges etc as directed by departmental officers.

Supply,delivery ,fabrication and fixing of MS ladder of 45cm clear wide made out of 50x50x6mm MS angle using 16mm dia MS bars at 30 cm C/C as steps for 100000 litre SR 12m staging as per type esign and as directed by the departmental officers

Supply and fixing in position of enamelled water level indicator with all accessories of approved pattern and design as directed by TWAD Board officers.

Supplying and fixing in position of 0.60 x 0.60 m water tight CI manhole frame and cover of approved pattern at the roof slab and as directed byTWAD Board officers. The manhole frame and cover should be of light duty and confirming to I.S. 1726 /1974

Cut stone set in C:M 1:3 ( one cement and three sand ) using well dressed cut stone supporting inlet pipe of size 0.30 x 0.30 x o.15m for service reservoir as directed by TWAD Board officers.

Providing and fixing of RCC 1:2:4 ( one cement, two sand and four course aggregate of 20mm size hard blue granite broken stone ) for ventilators of approved pattern including cost of cement, reinforce ment, centering, shuttering, strutting etc, complete a

Supplying and fixing in position of RCC 1:1.5:3 of 20mm size HBG inside access ladder of approved design and pattern inside tank including cost of cement,reinforcement,centering ,shuttering ,strutting etc., complete as generally shown in the plan and as directed by TWAD Board officers.

Provision for pipe connection arrangements

Inlet connection

100 mm GI pipe

100 mm GI 90 degree bend

100 mm GM Gate Valve

Outlet connection

100 mm GI pipe

100 mm GI 90 degree bend

100 mm GM Gate Valve

Scour

100 mm GI pipe

100 mm GI 90 degree bend

100 mm GM Gate Valve

Over Flow

100 mm GI pipe

100 mm GI 90 degree bend

100 mm GM Gate Valve

Watersupply arrangements

Supply and delivery of 75mm PVC Pipe

Earthwork excavation and depositing on bank with initial lead and lift of 10m including all cost etc complete.

Refilling with excavated soil other than sand including all cost and all labour charges etc complete.

Laying and jointing of 75mm PVC Pipes and specials etc complete.

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