... steel grating, serrated steel grating, I section type steel grating. We are the leading manufacturer ... ) Bearing Bar (Load Bar) Specifications (mm):The specification of plain type and serrated type bearing bar is ... , 80, 90mm etc, or according to client's request and 30, 40, 60mm are recommended, America ... 50, 76, 100mm etc, or according to client's request and 50, 100mm are recommended, America standard ...