... shape 4>Hot-dipped galvanized,Painted,Untrea 1.Metal Bar Grating Comprehensive type and broadest range in ... BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3 ... type, serrated type, serrated I type; cross bar: round type and square twisted type.Standard grating: ... Certificate: ISO9001&ISO14001 hot dip galvanised metal bar grating