... dimension.1.1 Material Q235 , or other equivalent material1.2 Grating Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657 ... , JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5 ... , Germany,Switzerland,etc.4. Capable design can make grating customized according to site requirement. Steel Grating Black Panel