... c.reliable manufacturer Steel Galvanized Grating Grating type: flat bar: plain type, plain I type, serrated type, ... type and square twisted type. Grating Specification Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3 ... flat bars(mm)12.5,15, 20, 30, 30.6, 32.5, 34, 34.8, 35.3, 40, ... 50, 50.8, 70, 75, 80, 100, 101.6, 102…… Welcome to visit our factory! Anping Shuangyi Metal ...