Angle iron is a flat metal rod bent at a 90 degree angle, commonly made of iron or steel for structural use. Aluminum and brass are used for weight or aesthetic purposes. Slotted angle iron has holes for easy assembly and is used for commercial shelving. Angle brackets are L-shaped pieces used for support.
An angle iron is a flat metal rod that has been bent at a 90 degree angle along its length, resulting in an L-shaped piece. Usually the two sides of the angle are of equal length. Heavier angle iron is often a structural member in buildings, bridges, and so on, while a lighter version is used for a variety of supports. An adjustable bed frame, for example, is made from this material.
Iron and steel are the most common materials used to make this mate, especially when it will be used in a structural frame. In these cases, the rod is often referred to as angle steel or steel angle iron. Aluminum is used when weight or rust are important considerations. Brass angle is sometimes used in projects, especially when the rod will be visible in the finished work and aesthetics are important. Angle iron is sometimes sold with a powder coat finish that resembles paint.
Angle iron comes in several standard dimensions, usually expressed by naming the length of a side. The one with the longer sides is typically made of thicker metal and has a thicker “root,” the area where the bend is. Larger versions can support heavier loads.
Slotted or slotted angle iron has holes at standard intervals along both sides. Usually the holes are one inch (2.54 cm) apart as measured from the center of each hole. The holes are oval rather than round to allow for different stresses in the finished product. Slotted angle iron is often used for uprights in commercial shelving, as the sections are easy to assemble with nuts and bolts. Pre-cut lengths with molded metal shelves are often packaged and sold as garage shelving.
Angle brackets are sometimes called angle irons. These are also L-shaped pieces of metal, but the bend crosses the width of the flat metal rod instead of along its length. Corner brackets are often bolted to the wall and used to support shelves.
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