... : 20 x 3 to 100 x 62) Bearing bar pitch: 12.5, 15, 30, 40, 60mm ... used steel gratings. The bearing bar comes in the form of a plain surface flat bar, commonly used for platforms, ... trench gratings, and stair treads, etc.Features:1) Bearing bar ... s requirement and 30, 40, 60mm are recommended3) Cross bar pitch: 38, 50, 76, 100mm, also be ...