1.Galvanized steel grating 2.Metal grating 3.ASTM A123,SS400 ... -MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4 ... 25X5…..40X6, 40X8, 40X10,….90X6….Pitch of Load bearding flat bars(mm)12.5,15, 20, 30, 30.6 ... dimension is not limited to above.1.4 Grating type: flat bar: plain type, plain I type, serrated type, serrated ...