These have been the standard in Commercial/Industrial buildings for many years. Designed with horizontal ribs roll-formed into the exterior skin, and typically available in white or brown, there is a wide variety of insulation possibilities and window options.

Several models of steel doors originally designed for the residential market are of sufficiently heavy duty construction to be used in conjunction with heavy duty track and hardware and used in commercial applications. Typically these might be used on fire houses or in businesses seeking an attractive appearance.