1, Anti-slip 2, Anti-rust 3, Full range in bearing bar size and mesh size 4, Largest production capability 5, Best deliv Hot dipped galvanized steel grating 1.Steel Grating is made by carbon or mild steel of certain sizes through the processing of grooving, lockpressure, welding, finishing and other treatment. Industrial bar gratings can be actually made from copper, aluminum and oth er materials ...