... the most widely 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 specification: 20 x 3 to 100 x 62) Bearing ... 's requirement and 30, 40, 60mm are recommended3) Cross bar pitch: 38, 50, 76, 100mm, also be according ...