... .1. Bearing bar specification: 25 x 3 to 60 x 62. Bearing bar pitch:12.5,15,25, 30, 34,40, ... 60mm etc., also be according to client's requirement and 30 ... ,40mm are recommended3. Cross bar pitch: 38, 50, 76, 100mm, ... and ladders etc.Grating Dimension Bearing bar pitch(mm)12.5, 15,25, 30, 30.16, 32.5, 34, 40 ...