However, unitised curtain walling usually comes at a cost premium and is generally more appropriate for very large facades and where there might be issues of site access. When building designs require glazed facades to withstand high slab deflections one solution is to incorporate unitised curtain wall systems like Kawneer’s AA®201 or AA®265 systems, which due to their construction, can provide greater movement allowance. This places additional demands on a façade design team to accommodate movement between slab and façade. One of the main complexities in designing a glazed façade is the accommodation of slab movement/deflection, and due to the extension of structural spans seen in contemporary building designs, slab deflection is increasing. Kawneer introduces an enhanced +/- 5mm expansion joint to its high-performance AA®110 SSG system.
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