Drone Footage from a recent job installing a new Schweiss All Strap Bifold Hangar Door. This airport is full of Schweiss Doors new and old and continues to expand with more hangars complete with Schweiss Bifold and Hydraulic Doors. Check out Schweiss Doors for all your door needs. Schweiss has options: Hydraulic Doors, Bifold Doors, Designer Doors, StandAlone Doors.