Steel Floor Grating 1.galvanized well 2.Bearing bar pitch: 30mm, ... : 50mm or 100mmSteel Bar Grating: material: Q235A or stainless steel plate, General Specification: 20*3, 25*5, 25*3 ... 65*5 etc.Cross bar: Q235A or 304 stainless steel wire, General Specification: 5*5,6*6,8*8mm4. ... platform, corridor, bridge, well covers, stairs.5. Ventilation, light leakage, thermolysis, antiskid, explosion-protection.