A door apparatus for closing an access opening and to a parking apparatus equipped therewith. The door apparatus has two vertically aligned guide rails and an inner and an outer door element which are each movably mounted in/on a vertically aligned inner or outer guide of the guide rails. In a closed position, the inner door element is arranged in a first region of the access opening which is situated lower than a second region in which the outer door element is arranged. In an open position, the inner and the outer door element are arranged in a third region of the access opening which is situated higher than the first and the second region. Furthermore, the door apparatus has a locking element and a coupling element.

A system for reversibly dividing a space is disclosed. A first panel consists of a first vertical member and a first horizontal member attached perpendicular to a bottom end of the first vertical member and extends away from the first vertical member towards a second panel. The second panel consists of a second vertical member and a second horizontal member attached perpendicular to a top end of the second vertical member and extends away from the second vertical member towards the first panel. The first and second panel can be stored in an overhead position. The space is reversibly divided when the first panel and the second panel are lowered. The first panel is lowered such that the first panel forms a top portion of a wall. The second panel is lowered until the second horizontal member rests on the first horizontal member, forming a bottom portion of the wall.

A system for reversibly dividing a space is disclosed. A first panel consists of a first vertical member and a first horizontal member attached perpendicular to a bottom end of the first vertical member and extends away from the first vertical member towards a second panel. The second panel consists of a second vertical member and a second horizontal member attached perpendicular to a top end of the second vertical member and extends away from the second vertical member towards the first panel. The first and second panel can be stored in an overhead position. The space is reversibly divided when the first panel and the second panel are lowered. The first panel is lowered such that the first panel forms a top portion of a wall. The second panel is lowered until the second horizontal member rests on the first horizontal member, forming a bottom portion of the wall.

An overhead door having a plurality of unconnected panels. Each panel has a top and bottom edge interlocking retention geometry and end caps. The end caps engage dual track guide assemblies to completely separate the panels as the door is raised.

A door apparatus for closing an access opening and to a parking apparatus equipped therewith. The door apparatus has two vertically aligned guide rails and an inner and an outer door element which are each movably mounted in/on a vertically aligned inner or outer guide of the guide rails. In a closed position, the inner door element is arranged in a first region of the access opening which is situated lower than a second region in which the outer door element is arranged. In an open position, the inner and the outer door element are arranged in a third region of the access opening which is situated higher than the first and the second region. Furthermore, the door apparatus has a locking element and a coupling element.

A lift wall for covering a large opening between an indoor and outdoor space, such as a veranda or lanai. The lift wall comprises several vertically arranged panels that are at least partially transparent. Each of the panels is mounted in in a vertical side channel for movement between a closed position and an opening position. In the closed position, the panels are spread vertically with overlapping and interlocking horizontal edges to seal the opening. In the open position, the panels are positioned in side-by-side stacked arrangement, which may be at the top or the bottom of the opening. Top stacking is ideal for spaces where foot traffic traverses the threshold of the opening. Bottom stacking is advantageous for upper levels; the stacked panels provide a safety railing while not obscuring the view. A mesh screen panel may be added for use when the panels are retracted.