... :2000 3.ASTM A123,SS400 4.Common pitch:30mm&40mm Stainless Steel Grating No.ItemDescription1Bearing Bar25x3, 25x4, 25x4.5, 25x5, 30x3, ... . 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 & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray ...