Cold-formed steel framing is sheet steel that is formed into shapes and sizes that are similar to what builders are accustomed to seeing in dimensional lumber (x4, x6, x8, x10, x1, and so forth). Steel framing members are formed in a process called roll forming by passing sheet steel through a series of rollers to form the bends that make the shape, e.g. the web, flanges, and lips of a stud or C-shape. Because this process is done without heat (also called “cold forming”) the studs and joists are made stronger than the original sheet steel.
Just like Light Steel Framing (LSF), Cold Formed Steel (CFS) framing is also a term commonly used to refer to light-gauge steel members with thicknesses ranging from 0.033 to 0.118 inches (0.84 to 3.00 mm) that are produced by roll forming. These members may be wall studs, track, floor joists, roof rafters, bridging channels, furring channels, or related accessories. Also included are non-load bearing drywall studs, which have a steel thickness ranging from 0.018 to 0.033 inches (0.46 to 0.84 mm). LSF construction can use individual steel components or prefabricated panels, assembled on site using self-tapping screws to create a whole building structure.