mild steel grating floor grating 1. ISO9001 2. Type: Plain,Serrated,I-bar mild steel grating galvanized steel grating ... 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc2Bearing Bar Pitch12.5, 15, 20, 23.85 ... -4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76 ... , 80, 100, 101.6, 120mm, 2'' & 4'' etc 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304 ...