Expanded metal gratings are the ideal metal material for industrial walkways. The gratings combine light weight with unusual strength because each diamond is designed like a truss; every strand works to distribute the load in all directions to the supporting structure. Although Expanded Metal Grating is used extensively for walkways it also has many other uses. LEARN MORE Expanded Metal Grating is identified by weight per square foot. Carbon Steel Expanded Metal Grating is available in 3, 3.14, 4, 4.27, 5, 6.25 and 7 pounds per square foot. Aluminum Expanded Metal Grating is available in 2 pounds per square foot and Stainless Steel Expanded Metal Grating is available in 3.3 and 4.5 pounds per square foot.