... /NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, ... dimension is not limited to above.1.4 Grating type: flat bar: plain type, plain I type, serrated type, serrated I ... techneque and equipment guarantee high quality of gratings. Most of machine were imported from Japan, Germany,Switzerland,etc.4. Capable ...