Double-leaf balcony with a movable post

Double-leaf balcony windows with a movable mullion. Window leaf - a movable or immovable part. The movable leaf is attached to the frame with hinges, but fixed glazing is possible in two versions - fixed glazing in the frame or leaf. Fixed glazing otherwise FIX is a non-opening window without hinges and handles. The movable mullion is one of the elements of the window structure, permanently connected to one of the sash frames. This makes it possible to divide the window with the sashes closed, but after opening them, it allows free use of the non-divided space. There is a possibility of any configuration of double-sash balcony windows with a movable post.