Door Engineering's Bottom Rolling Hangar doors are excellent for corporate, FBO, charter and airline hangars. Each door section is bottom rolling and top guided and available in many configurations including, uni-directional, bi-parting, individually operated, 3-way traveling group and anchored group. Options include built-in operator, vehicle entry doors, remote/radio controls and rough framed openings for personnel doors and vision lites. Bottom Rolling Hangar Doors may be manufactured in sizes over 500' wide and up to 80' high.