“Strut channel is a standardized formed structural system used in the construction and electrical industries for light structural support”. According to WIKI, Strut is usually formed from metal sheet, folded over into an open channel shape with inwards-curving lips to provide additional stiffness and as a location to mount interconnecting components. Increasingly, strut is being constructed from fiberglass, a highly corrosion-resistant material that’s known for its lightweight strength and rigidity. Strut usually has holes of some sort in the base, to facilitate interconnection or fastening strut to underlying building structures.“