Abstract: A building structure consisting of a framework of uprights and beams of profile material which is covered on the outside with sheet-like material such as plastic foil, wherein on at least the roof portion of the framework the foil is fixed with a longitudinal edge to a longitudinal beam connected to the framework and wherein a second longitudinal beam is fastened to the parallel opposite longitudinal edge of the foil and is driven for rotation on the central axis thereof such that the second beam winds itself into respectively out of the foil, such that opening and closing of said roof or wall portion of the foil covering can take place easily and under tension.