... , ANSI/NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, ... and dimension is not limited to above.1.4 Grating type: flat bar: plain type, plain I type, serrated type, ... Japan, Germany,Switzerland,etc.4. Capable design can make grating customized according to site requirement. Galvanized Steel Grating Serrated_Cut-to-size