Abstract: A roll-up door for opening and closing off door and gate openings. The roll-up door includes a hanging portion that is made of flexible material, is in a sheet-like form, and is guided along its sides in a frame. To increase the wind stability and strength of the hanging portion, profiled stabilizing members are securely connected to the hanging portion. The stabilizing members extend along the hanging portion at right angles to the direction of travel of the latter.

Abstract: A sliding door, which includes a winding tube, which is mounted on a winding shaft for winding up and unwinding a hanging door for opening and closing-off an opening, and a take-up and tensioning mechanism which is disposed between the free end of the hanging door and the winding shaft and which has traction members which are guided about guide pulleys. The take-up and tensioning mechanism for the hanging door includes take-up or tensioning pulleys, which are freely rotatably mounted on the winding shaft on both sides of the winding tube, and pretensioned leg springs which are disposed between the pulleys and the winding shaft.