Though known for its manufacture of bifold doors for hangars and farm buildings, Schweiss Doors of Fairfax, MN, has supplied doors for countless other types of projects too. An example can be found at the Chelan County Gate of the Rock Island Dam in central Washington. There, a 25’-wide by 8’-high Schweiss bifold door was installed on a building that houses equipment related to the dam’s operation. To help dissipate heat generated when the equipment is functioning, the door was specified with ventilating louvers.