... :2008 3. 30/100 mesh size 4. 1X5.85m Galvanized floor steel grating,flooring grating,trench grating,stair treadSpecificationsAdvantages of steel grid plank: light weight, strong ... /700-881) Bearing bar pitches may be 12.5, 15 to 30, 40, 60, 80 and 90mm; of which 30and 40mm ... and secure, wears well, non-sagging,non-dirt, and easy to install 4) Hot galvanizing standard: China GB/T13912-925) Wrapping ...