Providing precoated GI sheet for DG Sets at Telephone Bhawan Imphal

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

(a) 1:2:4(1 cement:2 coarse sand(zone-III) derived from natural sources:4 graded stone aggregate 20 mm nominal size derived from natural sources)

Structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete.

(a) Hot finished welded type tubes.

Providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by Engineer-in-Charge) of total coated thickness 0.50 mm (base metal of minimum 0.45 mm thickness with total coating thickness of 0.05mm) with zinc coating 120 grams per sqm as per IS: 277, in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns. Sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length upto 12 metre or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling /seIf tapping screws of size (5.5x 55 mm) with EPDM seal, complete upto any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required.

(a) Ridges plain(500-600mm)

(a) 1:6(1 cement:6 coarse sand)

(a) One or more coat on old work.

(a) Nominal concrete 1:3:6 or richer mix(i/c equivalent design mix)

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