Schweiss Doors offers Bifold and Hydraulic Hangar Doors featuring easy access, hangar security, and a clean design. Schweiss one-piece hy-draulic hangar door are unlike any on the market featuring robust hinges, efficient pump, bigger, safer cylinders with built in safety features! Schweiss Bifold hangar doors featuring patented lift straps and latching straps. Straps are safer, quieter, and faster than outdated cables. Remote option available!