Aluminum rods are used to make rivets, nails, screws, and bolts. An aluminum bar is easy to drill, saw, punch, and machine. The aluminum alloy has corrosion resistance and is used in a range of applications including railings, shelving, and framing. Aluminum tubes tend to have thicker walls than pipes, and are measured by the outside diameter, while tubes are measured by inside diameter. Aluminum comes in other construction applications as well, including aluminum sheets, used in aerospace, transportation, and construction jobs. Aluminum treads are grated, lightweight stairs steps used in many industrial and commercial applications, while aluminum gratings are used in many architectural interior and exterior designs. And Aluminum channels are u-shaped, lightweight, and excellent for welding.