... . 3.Surface treatment: Hot-dipped galvanized, Painted light wight STEEL GRATING Bearing bar pitch: 30, 40, 60mm etc.Cross bar pitch ... : 50, 100mm etc.Surface treatment: Hot-dipped galvanized, Painted Steel Grating Mesh is made by welding with flat steel and bars ... .In this case, the bearing capacity is up to the grating which you choose as your practical demand.