A door system designed for buildings that store large objects such as airplanes or farm, marine, and other heavy equipment. The door system is comprised of a door, a lift frame, and a brake system disposed within the lift frame and coupled with the door. Furthermore, an articulating arm system connects to the lift frame and the door and a drive system connects to the brake system. The drive system moves the brake system within the lift frame such that the brake system and the articulating arm system guide the door between an open and a closed position.