NIT No-15 EE (SDW) II/ (22-23) Item No. 18

Providing/Fixing/Strengthening of safety Railing made out of 40 mm dia M.S. pipe & 80 x 80 x 10 mm size Angle Iron at Aeration unit at 37 MGD STP Okhla by carrying out the following works: - Dismantling of the existing old and damaged safety railings vertical posts and MS Pipe approx. (180 + 650) with the help of gas cutter and Man Power etc and stacking the old railing at appropriate place prescribed by Engineer in-charge.

Safety arrangement for the man and machinery around the deep aeration chamber as per NHRC guidelines.

Providing the vertical M.S post in a length of one meter, made out from M.S Angle Iron of sizes 80 x 80 x 10 mm duly welded with M.S. plate of sizes 100 x 130 x 10 mm in one side i/c making hole for fixing the fasteners.

Providing of M.S. pipe heavy duty ‘B’ class 40 mm dia. Make: - Jindal/TATA

Fixing/ fitting of vertical post by grouting of Nut bolt in the RCC floor and welding with the existing reinforced i/c all civil works. The work includes chipping the floor with the help of Hammer drill/Chisel/ Man Power.

Cutting of hole in the vertical post with the help of Gas cutter/ Grinding machine suitable for passing through the above Horizontal M.S. pipe of Railing.

Fixing of 650 mtrs. Horizontal pipe of railing in the Vertical post with proper leveling & thermal welding of the same.

Providing the metal primer red oxide (in 20 Ltrs. Packing).

Providing the synthetic enamel paint Golden yellow (in 20 Ltrs. Packing) Make: - Asian/ Nerolec/Berger.

Providing of thinner (General propose) for diluting the paint (in 20 Ltrs. Packing). Make: - Asian/ Nerolec/Berger.

Painting the complete safety railing with one coat of epoxy primer and two coat of enameled paint by using paint brush, dhoti and other auxiliary items.

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