1. Full range in bearing bar size and mesh size 2. Largest production capability 3. Best ... -MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4 ... above.1.4 Grating type: Serrated I type,with square twisted cross bar.1.5 Finishing treatment: a. Galvanized, b. Untreated (black ...