... steel2.Bearing bar:from 20x3mm to 100x10mm/ I section from 25x5x3mm to 75x7x4mm3.Bearing bar pitch:12 ... .5mm,30mm,34.3mm,40mm,60mm or according to your requirement Cross bar ... ,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25 ... 1/2"x 1/4" etc.3Cross bar pitch38,50,76,100,101.6mm4MaterialQ235,A36,SS3045Surface ...