tender for comprehensive repair to otm accn of 9 csr at mil stn yol- 1 dismantling plain or corrugated steel sheeting of any gauge, thickness as in roof covering complete all as specified and as directed. 2 pre-painted galvalume aluminum zinc coating gi based corrugated steel sheet 0.50mm thick of any colour having tensile strength of 550 mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified, complete all as specified and directed. 3 pre-painted galvalume aluminum zinc coating gi based plain steel sheet 0.50mm thick of any colour having tensile strength of 550 mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified, complete all as specified and directed. 4 corrugated galvanized iron mild steel sheets 0.63mm thick, grade ‘o’, with 120 grams per square metre zinc coating fixed with j or l hook as in roof covering with two corrugation side lap. (horizontal distance of side lap shall not be less than 145mm and depth of corrugation shall be 12.50mm), complete all as specified and directed.