... production capability c.reliable manufacturer (a state-owned company) Steel Galvanized Grating 1) Bearing Bar (Load Bar) Specifications (mm):The ... .5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 ... etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available <1'' ... , 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4 ...