... easy to clean, convenient installation.Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3 ... , 80, 100, 101.6, 102……Grating type: flat bar: plain type, plain I type, serrated type, serrated I ... type; cross bar: round type and square twisted type.Types of steel ... cover plate Ladder pedal (foot pedals) high quality steel grate