Hinged upper door frame member

A portable building comprising:

• a plurality of sidewalls, a roof, a floor, and a plurality of skids installed beneath the floor and on which the building rests, one of the plurality of sidewalls defining an opening therein:
• a hinged upper frame door member installed on the one of the plurality of sidewalls at an upper end of the opening, the hinged upper frame door member having an upper end and a lower end, the hinged upper frame door member being hinged at the upper end;
• a door being installed on the one of the plurality of sidewalls at a lower end of the opening, the door having an upper end and a lower end, the door being hinged at the lower end,
• wherein the upper door frame member is movable from a first and generally vertical position to a second and generally horizontal position, the door being moveable from a closed generally vertical position and an open position, and adapted and configured to serve as a ramp when in the open position;
• the door and the hinged upper frame door member both being sized such that when the door is in the closed position and the hinged upper frame door member is in the first position, the door and the hinged upper frame door member meet at a point within the opening, the point being closer to the roof than the floor;
• the hinged upper frame door member being adapted and configured to prevent the door from moving from the closed position to the open position when the hinged upper frame door member is in the first position, wherein the hinged upper frame door member is sized to interfere with the door such that the door is prevented from moving from the closed position to the open position when the hinged upper frame door member is in the first position;
• and
• a control mechanism operable by a user to effect movement of the hinged upper door frame member to both open and close the hinged upper door frame member and thereby move the member between its vertical and horizontal positions the control mechanism configured to secure the door in the closed position, the control mechanism comprising a rotatable rod, a spool coupled to the rotatable rod, and a torsion spring coupled to the rotatable rod, and at least one of a rope, a chain, or a wire, the at least one of a rope, a chain, or a wire being spooled on the spool and coupled to the door such that the control mechanism is adapted and configured to actuate the door, the control mechanism further comprising a separate at least one of a motor or solenoid adapted and configured to actuate the hinged upper door frame member independently of the door.