... standards. 1. Bearing bar specification: 25 x 3 to 60 x 6 2. Bearing bar pitch: 12 ... 15,25,30, 40, 60mm etc., also according to client's requirement and 30,40mm are recommended.3 ... pitch: 38, 50, 76, 100mm, also according to client's requirement and 50,100mm are recommended.4. ... fences,framedgrates,trash rack grates ,paint backing chambers……Guide to Selection of steel Grid PlateLight & Medium Duty Maximum ...