... capability c.reliable manufacturer Steel Galvanized Grating Grating type: flat bar: plain type, plain I type, serrated type, serrated I ... type; cross bar: round type and square twisted type. Grating Specification Load Bearing ... Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4 ...