... Grating Mesh is made by welding with flat steel and bars with certain distances. It goes through cutting ... well resistance of strong impact on surface. Gratings with cross bar centers at 50mm can bear lateral impact ... , 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, ... different shape,different standard,and any special requirements with different bearing capacity and span.In this case ...