46 mm thick steel Check door of 60/120 minutes Fire rating confirming to BS ;476
Part-22and IS : 3614 Part-II Fabricated with 2 nos 18SWG galvenised steel sheet
sandwiching with proprietary fire resistant insulation materials in-between. The door
frames are manufactured from 16SWG galvenised steel sheet pressed form to double rebate profile of size 143mm x 57mm. The door frame and door shutter are fitted with SS BALL BEARING HINGES (100X75X3MM) and are coated with one coat of fire and corrosion resistant primer.