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Glass curtain walls are lightweight aluminum-framed facades housing glass or metal panels. These glazing systems don't support the weight of a roof or floor. Instead, gravity loads and wind resistance transfer from the surface to the building's floor line.Window walls are built one floor at a time and are supported by the slabs above and below them. In other words, window walls are built within the slab edge. Curtain walls are structurally independent and don't require support on every floor. They tend to span multiple stories and are built outside the slab edge.

A folding window is a window system structured to accommodate several panels that are fixed to fold. The window is either opening to one side or both sides fold to opposite directions.They work on a simple tacking system. They run along panels that are connected on a train, simply gliding along the tracking systems. They also fold in on themselves to save space. Made from a series of glass panels, folding doors fold up against the wall.