e tender for truss work at thiruvananthapuram - 1 structural steel work in single section , fixed with or without connecting plate , including cutting , hoisting, fixing and applying a priming coat of approved steel primer all complete. 2 providing and fixing precoated galvanised iron profile sheets ( size, shape and pitch of corrugation as approved by engineer in charge ) 0.35mm, 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 sheet and polyster top coat 15-18 micons. 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 ( 5.5x55 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.