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This Technical Note replaces F140-10. In cold-formed steel construction, welding may be the preferred joining method for roof trusses, panelization of walls, and hardware connections. This Tech Note provides information on the applicable codes, processes, procedures, design considerations, fabrication and inspection involved in welding cold-formed steel members and hardware components. It introduces common welds and their uses; covers welding processes such as shielded metal arc welding (SMAW), flux cored arc welding (FCAW), submerged arc welding (SAW), gas metal arc welding (GMAW), and gas tungsten arc welding (GTAW); discusses fabrication; provides information on design considerations for arc seam, fillet, flare groove, groove, arc spot and arc plug welds; and summarizes safe practices.