1>Bearing bar pitch:30,40,60mm 2>Cross bar pitch;50,100mm 3>Plain,Serrated,I-shape ... resistance of strong impact on surface. Gratings with cross bar centers at 50mm can bear lateral impact well. This kind of ... for all kind of industrial platforms. Bearing bar centers at 40mm: light grating and very economical. This kind of ... w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, 100, 101 ...