... 30,40,60mm 2.Cross bar pitch:50,100mm 3.type:Plain,Serrated,I-shape 4.Hot-dip ... non-skid property & safety compared with plain grating.3.I-shape:Lighter,more economical and practical comparing with ... customer on the occasion when the clear span is small.3.Steel grating with 60mm bearing bar pitch & 50mm ... silt by slitting shears are available for bearing bar.3.Tolerance for the size of hot-rolled flat ...