... 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc 2Bearing Bar Pitch12.5, 15, 20, ... 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, ... : BS4592-1987, Australia: AS1657-1985,Germany: DIN24537-1-2006, Japan:JIS Steel Grating, Bar Grating, Floor Grating, Stair Treads, Trench Grating ...