... , AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, ... dimension is not limited to above.1.4 Grating type: flat bar: plain type, plain I type, serrated type ... were imported from Japan, Germany,Switzerland,etc.4. Capable design can make grating customized according to site requirement. Galvanized Steel Grating Serrated_Cut- ...