Abstract: A pivotable, sliding, glazing structure is disclosed which comprises one or more panes supported between upper and lower guide-rails for horizontal sliding movement along the rails. Each pane has a leading edge and a trailing edge and is adapted to perform a pivoting motion about its leading edge at a respective predetermined position for each pane along the guide-rails. This is achieved by means of a pivot arrangement carried on the pane and arranged in the vicinity of the leading edge. The structure allows the pivot arrangement to be locked against further sliding movement when each pane reaches its respective predetermined position by displacing a portion of the pane inwardly so that at least a part of the pivot arrangement is held in a receiving element mounted on one of the guide-rails.