... Steel Grating Bearing bar:30,40,60mm Cross bar:50,100mm Plain,Serrated,I-shape Hot-dipped galv,Painted Steel Grating1>Bearing bar pitch:30 ... 50mm,76mm and 100mm are recommended. 3) Steel grating is made by the world first-class equipment ... pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. ... 4" etc.3Cross bar pitch40,45,50,76,100,101.6mm etc4MaterialASTM A36,A1011,A569,Q235,2755Surface ...