A fitting assembly for a window or door includes a leaf tiltable and detachable from, and slidable parallel to, the fixed window or door frame, and a control element with a fastener mountable permanently on the frame and an insertion part pivotable and slidable relative to the fastener. In an insertion position, in which a control pin is pushable into the insertion part, an insertion part end section lies preferably partially against the fastener for conducting away control pin-insertion part impact into the fastener via the end section. The insertion part may pivot out of interlocking engagement with the fastener by a control arm on which the control pin may be located or formed, such that subsequently the insertion part can slide via the control pin. The control element can have a freewheel mechanism for pivoting the insertion part only during fitting assembly opening and not during closing.

A fitting assembly for a window or door includes a leaf tiltable and detachable from, and slidable parallel to, the fixed window or door frame, and a control element with a fastener mountable permanently on the frame and an insertion part pivotable and slidable relative to the fastener. In an insertion position, in which a control pin is pushable into the insertion part, an insertion part end section lies preferably partially against the fastener for conducting away control pin-insertion part impact into the fastener via the end section. The insertion part may pivot out of interlocking engagement with the fastener by a control arm on which the control pin may be located or formed, such that subsequently the insertion part can slide via the control pin. The control element can have a freewheel mechanism for pivoting the insertion part only during fitting assembly opening and not during closing.

A guide system is provided for movably supporting a cover element for covering an opening in a stationary structure. The guide system includes a first guide rail and a first guide body movably arranged thereon, a second guide rail and a second guide body movably arranged thereon, and a compensation device for compensating for a tilting moment of a cover element. The cover element can be moved by the guide system between a first position and a second position, and the compensation device has a cable connecting the first guide body and the second guide body together. A deflecting device allows the cable to be guided orthogonally to the longitudinal extension of the first guide rail and/or the second guide rail at least in some regions, preferably in a region between the first guide rail and the second guide rail.