... into the bearing bar by high tension resistance welding ring which is controlled by computer, So we can produce high quality gratings ... bar: 30mm, 40mm, 60mmCross bar pitch: 50mm or 100mmSteel Bar Grating: material: Q235A or stainless steel plate, General Specification: 20*3, 25 ... , 40*5, 50*5, 65*5 etc.Cross bar: Q235A or 304 stainless steel wire, General Specification: 5*5,6*6 ...