... , convenient installation.Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4. ... 5,15, 20, 30, 30.6, 32.5, 34, 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm ... )38.1, 50, 50.8, 70, 75, 80, 100, 101.6, 102……Grating type: ... Platform steel grating Ditch cover plate Ladder pedal (foot pedals) high quality steel grate