... .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, ... Germany,Switzerland,etc. 4. Capable design can make grating customized according to site requirement. Floor Steel Grating,Stair tread,Mezzanines/decking