bids are invited for galvanised iron profile sheet precoated galvanised iron profile sheets 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 of 4.27 metre . precoated galvanised steel sheet roofing accssories: ridges plain ( 500 - 600 mm ) precoated galvanised steel plain ridges 0.50 mm ( +0.05% ) tct and 500-600mm wide, 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. ridges plain ( 500 to 600 mm ) tapping screws with epdm seal self drilling / self tapping screws of size ( 5.5x 55 mm ) with epdm seal, ( weight 700g / 100 screw )