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The double-layer cladding is a system of building consisting of two skins placed in such a way that air flows in the intermediate cavity. AJ standard components allow the best optimization of the interfaces between main frame and skins. The typical routels used for glass skins are considered a standard in the AJ Chart, their connection with AJ Spiders is easy and flexible. Often, for protection and heat extraction reasons during the cooling period, solar shading devices are placed inside the cavity or outside, AJ standard connections help these applications.