1.Galvanized steel grating 2.Metal grating 3.ASTM A123,SS400 ... ANSI/NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ... of customers.3. The high-tec techneque and equipment guarantee high quality of gratings. Most of ... machine were imported from Japan, Germany,Switzerland,etc.4. Capable design can make grating ...