... most widely used steel gratings. The bearing bar comes in the form of a plain surface ... , and stair treads, etc.Features:1) Bearing bar specification: 20 x 3 to 100 x 62) ... s requirement and 30, 40, 60mm are recommended3) Cross bar pitch: 38, 50, 76, 100mm, also be according ... AS1657-1985Contact:Bessie XuMobile:0086-13831800310Trade manager:cn200202312Tel:86-318-5282777 Fax:86-318-5282000 bar grating