... plank: light weight, strong intensity, big load capacity, transmission and aeration, anti-skidSteel product standard: China YB/700-881) ... 12.5, 15 to 30, 40, 60, 80 and 90mm; of which 30and 40mm are recommended2) Cross bar ... may be 30, 38, 50, 76 and 100mm; of which 50 and 100mm arerecommended3) Advantages of steel grid planks: ... Galvanized floor steel grating,flooring grating,trench grating,stair tread