... and range in dimension. Flat bearing bar : all range 19X3,19X5, 20X3 ... 25X5,.....40X8,40X10,......90X6,...... Pitch of Bearing Bar(mm): 12.5, 15, 20, ... 3, 40, 60, 80,...... Pitch of Cross bar(mm): 38.1, 50, 50.8, 70 ... Material: Mild steel Q235 or other equivalent Grating Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, ... capable design can make grating customized according to site requirement. Xinxing ...