... , 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1'x3 ... -4, 11-w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 40,50, 60, 76, 80 ... , 100, 101.6, 120mm, 2' & 4' etc 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel ...