1. Full range in bearing bar size and mesh size 2. Largest production ... , BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, ... 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, ... I type, Serratd type, Serrated I type; Cross bar: Square twisted cross bar, Round cross bar2. Types of Drainage/Ditch Cover: a. ...