... Reliable steel grating supplier 2. Good quality steel grating 3. Easy installation & saving work ti 1.Comprehensive type ... YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥ ... 30, 30.6, 32.5, 34, 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38. ... round type and square twisted type. www.cnstrongstar.com Anping Steel Grating(China)