... capability 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, ... 25X5…..40X6, 40X8, 40X10,….90X6….Pitch of Load bearding flat bars(mm)12.5,15, 20, 30, 30. ... :+86-15203113087 galvanized steel bar grating weight