... T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3 ... 2. 11 sets of press welded (electro-forged welding) production lines creat largest production capability, flexible and ... machine were imported from Japan, Germany,Switzerland,etc.4. Capable design can make grating customized according to site requirement. Steel Grating ...