Window wall refers to the building envelope or decorative structure that can have a certain displacement capacity relative to the main structure through the load-bearing structure system and does not share the role of the main structure.

The window wall is the outer wall of the building. It is not load-bearing and hangs like a curtain, so it is also called a hanging wall. It is a lightweight wall with decorative effects commonly used in modern large and high-rise buildings. The building envelope is composed of a structural frame and inlaid panels, and does not bear the load and effect of the main structure.

Unit curtain wall and frame curtain wall have their own advantages and disadvantages. Regardless of the facade type, general design and functional guidelines must be followed to meet the aesthetic requirements of the building. Any type of curtain wall can be more suitable for specific situations to meet the needs of the building.

"Unitized curtain wall" can be mainly divided into: "Unitized curtain wall" and "semi-Unitized curtain wall", also known as rigid Unitized curtain wall. Inter-wall unit curtain wall. The above-mentioned Unitized curtain walls are classified differently, but the basic principles are exactly the same. It is essentially different from the frame curtain wall in the design and construction of the production principle.

Unitized curtain wall refers to a building curtain wall that is made into a complete basic unit of curtain wall structure in the factory by various wall panels and supporting frames, and is directly installed on the main structure.