1.Galvanized steel grating 2.Metal grating 3.ASTM A123, ... , BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, ... I type, serrated type, serrated I type; cross bar: round type and square twisted type.a.full range ... of needs of customers.3. The high-tec techneque and equipment guarantee high quality of gratings. Most of machine were ...