tender for replacement of damaged cgi sheet roofing of store barrack at bn hq kadamtala under ftr hq bsf north bengal.; 1 providing wood work in frames of doors, windows, clerestory windows and other frames, wrought ramed and fixed in position with hold fast lugs or with dash fasteners of required dia & length (hold fast lugs or dash fastener shall be paid for separately).kiln seasoned and chemically treated hollock wood 2 providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by engineer-in-charge)0.50 mm (+ 0.05 %) total coated thickness with zinc coating 120grams 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 engineerin- charge. the sheet shall be fixed using self drilling /self 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. 3 providing and fixing precoated galvanised steel sheet roofing accessories of total coated thickness 0.50mm (base metal of minimum 0.45mm 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 using self drilling/ self tapping screws complete :ridges plain (500 - 600mm) 4 12 mm cement plaster of mix :1:4 (1 cement: 4 fine sand) 5 applying priming coat:with ready mixed red oxide zinc chromate primer of approved brand and manufacture on steel galvanised iron/ steel works 6 painting on g.s. sheet with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade :old work (one or more coats) 7 painting with oil type wood preservative of approved brand and manufacture:old work (one or more coats) 8 painting with synthetic enamel paint of approved brand and manufacture of required colour to give an even shade :one or more coats on old work 9 finishing walls with acrylic smooth exterior paint of required shade :old work (two or more coat applied @ 1.67 ltr/ 10 sqm) on existing cement paint surface 10 dismantling wood work in frames, trusses, purlins and rafters up to 10 metres span and 5 metres height including stacking the material within 50 metres lead :of sectional area below 40 square centimetres 11 dismantling roofing including ridges, hips, valleys and gutters etc., and stacking the material within 50 metres lead of:g.s. sheet 12 providing corrugated g.s. sheet roofing including vertical / curved surface fixed with polymer coated j or l hooks, bolts and nuts 8 mm diameter with bitumen and g.i. limpet washers or with g.i. limpet washers filled with white lead, including a coat of approved steel primer and two coats of approved paint on overlapping of sheets complete (up to 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.0.63 mm thick with zinc coating not less than 275 gm/ m² : excluding cost of corrugated gs sheet which will be provided departmentally