U Channel, often referred to as UNP Steel.
Steel Channel is a hot rolled, mild steel structural U shape with inside radius corners that is ideal for all structural applications, general fabrication, manufacturing and repairs. Steel Channel is widely used in industrial maintenance, agricultural implements, transportation equipment, truck beds, trailers, etc. The configuration is ideal for added strength and rigidity over steel angle when your project's load is vertical or horizontal. This steel shape is easy to weld, cut, form and machine with the proper equipment and knowledge.
Brands : Ispat Bukit Baja, Krakatau Osaka Steel, Lautan Baja Indonesia, Karawang Prima
Standard : SNI 07-0052-2006 , ASTM A36, JIS G3101
Channel Bars / UNP Dimensional & Informative Reference - Weight Table