tender for annual plan-kmc 2025-26 cz1 div 44 pro. no. 1368/26-corporation office- maintenance of roof-general civil work-25-26--- 1 maintenance of roof 2 15.28.1:dismantling roofing including ridges, hips, velleys and gutters etc., and stacking the material within 50 metres lead of :g.s. sheet 3 50.10.2:steel work for purlin/single section with g i pipes including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete 4 od254739/2025-2026:providing & fixing at all heights, levels and locations mill finish aluminium alloy roofing sheets of alloy is designation 31500, temper hx8 conforming to is 737 and dimensions as per is code 2676 with characteristics of good formability and corrosion resistance. the profile sheets shall be fixed to truss members in slope or required pitch or curvature with hex cap headed self drilling/tapping stainless steel screws m6, 50 mm long with 3 mm epdm seal washer etc. all inclusive of labour, scaffolding, t&p and sundries etc. complete as per directions of the engineer-in-charge. (cost of truss/frame work shall be paid separately).0.40 mm or above nearest thick, aluminum troughed profile with center to center pitch of 200 mm, depth of 32 mm, overall profile width1092 mm, cover width 1000mm. 5 12.66.1:providing and fixing of pre-coated colour or mill finish aluminium roofing accessories in 0.71 mm thickness, alloy 31500 (is designation) [aluminium alloy (aa) 3004 (iso designation)] for color, coating shall be 5-7 microns epoxy primer on both sides of the sheet and polyester top coat 15-18 microns, using self drilling/tapping ss screws of size 6 x 50mm with 3mm thick epdm seal and ss plain washer completeprecoated/mill finish aluminium ridges plain(500-600mm) 6 13.50.3:applying priming coat:with ready mixed red oxide zinc chromate primer of approved brand and manufacture on steel galvanised iron /steel works 7 13.61.1:painting with synthetic enamel paint of approved brand and manufacture to give an even shade:two or more coats on new work