... , China (Mainland)Brand Name Spring harbourModel Number1-6mMaterialcarbon steel or mild steelgrating standardYB/T4001, ANSI/NAAMM-MBG531, BS4592 ... , AS1657, JS3101Grating Steel Material:Low Carbon Steel, Mild Steel, Grating Size:3'x20', 3'x24', 3 ... 30/100, 40/50, 60/100 and allGrating Application:steel platform, flooring and walkway, trench cover, stair treadPayment & ...