... has a high load, the structure of light, easy lifting; shape beautiful, durable, hot-dip zinc surface treatment ... , ANSI/NAAMM-MBG531, BS4592, AS1657, JS3101Grating Steel Material:Low Carbon Steel, Mild Steel, Grating Size:3'x20', 3'x24', 3 ... Application:steel platform, flooring and walkway, trench cover, stair tread contact personMichelle Gao electro and hot-dipped Galvanized steel grating for furance ...