Abstract: A building including an upper wall portion and a lower wall portion and a bi-fold door assembly mounted within an opening therein. The wall portions have front surfaces facing outwardly of the building and the upper wall portion is disposed in a plane intersecting the plane defined by the lower wall portion. The upper wall portion is sloped downwardly and outwardly of the top thereof to a position overlying the lower wall portion and the plane defined by the lower wall portion is a generally vertical plane with the top of the upper wall portion being disposed in or near the generally vertical plane. The bi-fold door assembly is movable between raised and lowered positions within the opening in the wall portions and includes an upper door section and a lower door section. The upper door section is hinged to the lower door section with the door sections having front surfaces facing outwardly of the building and rear surfaces facing inwardly of the building.

Abstract: A door track adapted for carrying a trolley supporting a door for rolling movement. The door track includes one or more single-piece track members having a first substantially planar surface and a pair of substantially identical spaced apart portions extending from the first substantially planar surface and forming a channel with the first planar surface. The spaced apart portions each have a substantially planar portion adjacent the first substantially planar surface to provide a plurality of flat mounting surfaces. The spaced apart portions further include inwardly curved portions extending from the substantially planar portions which are adapted to support a trolley for rolling movement therealong. The inwardly curved portions are spaced apart to freely receive a door supporting member which is secured to the trolley.

Abstract: A bi-fold door assembly for a building. The door assembly includes an upper door section and a lower door section hinged to one another together with a door track mounted in an upwardly and inwardly inclined position. Additionally, the bottom of the lower door section cooperates with the door track for guided raising and lowering movement of the bi-fold door. The door assembly may also include an automatic opener operatively associated with the upper and lower door sections. When provided, the automatic opener may include a battery powered electrical motor together with a battery operatively associated with a solar panel for recharging thereof.