NIT No-16 EE (SDW) II/ (20-21) Item No. 13

Repairing/ Restructuring of Bridge of PST of 15 MGD at 37 MGD STP, Okhla by carrying out following works:- Isolating the PST by operating Sluice Gate and providing gunny bags to ensure no flow in the FST. Dewatering the FST with the help of sump pumps and D.G. Set. Cleaning the site with the help of machines manually for execution of work

Dismantling of electric motor, primary gear box and other mechanical accessories from the top of center mechanism and shifting to workable place.

Dismantling of drive head by cutting nut and bolts with the help of gas cutter and dismantling shaft, worm gear complete transmission unit. The job includes dismantling of the gear box drive head gear complete unit.

Dismantling of Central cage & turn table, lifting & taking out of the PST plus shifting to ground level etc with tools & tackles and all safety equipments etc.

Dismantle the damaged structure of the bridge structure and shifting the same to a workable place with the help of heavy labour & tools & tackles etc.

Renovation of Centre drum i/c replacement of the damaged stiffeners of the drum and making required patch work with 5 mm thick M.S. sheet 10sq meter approx with the help of electric welding as per site requirement.

Making temporary platform as safety measures on the sides of the centeral cage as per site requirement for dismantling of drive head

Making arrangement for lifting of M.S. bridge to such a level with mechanical lifting equipment so that turn table can be dismantled safely with manual labour and material handling equipment etc.

Replacement of strip liner of high quality spring steel 40 of centre mechanism.

Replacement of turn table balls of size 38mm approx.

Assembling & Alignment of drive head and placing steel rollers.

providing the angle Irons of various sizes M.S angle Iron 65x65x6 approx 90 meter, M.S Channel 100x50 MM approx 70 meter, 40x40x5 approx 70 meter as per existing size in horizontal portion and in cross for strengthening of bridge. The work includes cutting of old damaged/ corroded angles with the help of Gas cutter and welding mechanism to be used for carrying out strengthening work.

Fixing of above M.S.Angle iron at bridge with the help of Electric Arc welding i/c the work of cutting, bending/ shaping of sheet as per site requirement.

Providing of Red oxide metal primer in 20 kg packing. Make: - Asian/Nerolec/Burger.

Providing of synthetic Enamel paint in Black/Orange Colour in 20 Ltrs.Make: - Asian/Nerolec/Burger

Painting of the complete structure after removing the rust from the structure with the wire brush.Painting the surface with the one coat of red oxide primer and two coat of anti corrosive paint.

Testing & Commissioning of complete unit on No Load/Full Load after removing gunny bags and temporary plate form.

Goodwill Enterprises