tender for renovation of various semi permanent sheds at btc itb police bhanu; 1 dismantling roofing including ridges, hips, valleys and gutters etc.,and stacking the material within 50 metres lead of:g.s. sheet 2 dismantling roofing including ridges, hips, valleys and gutters etc.,and stacking the material within 50 metres lead of: asbestos cement sheet 3 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 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 /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. 4 extra for providing and fixing wind ties of 40x 6 mm flat iron section. 5 providing and fixing precoated galvanised steel sheet roofingaccessories 0.50 mm (+0.05 %) total coated thickness, 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)