... dimension.1.1 Material Q235 , or other equivalent material1.2 Grating Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, ... type and square twisted type. 1.4 Finishing treatment: a. Galvanized, b. Untreated (black self-color), c. Painted 2. sets ... Japan, Germany,Switzerland,etc. 4. Capable design can make grating customized according to site requirement. Load Bearing Flat Bar sizeThickness ...