... .ASTM A123,SS400 4.Common pitch:30mm&40mm Stainless Steel Grating No.ItemDescription1Bearing Bar25x3, 25x4, 25x4.5, 25x5, ... 3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etcUS standard: 19-w-4 ... 2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 40,50, 60, 76, 80, 100, 101.6, 120mm ... , A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, ...