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Constructed from MagHansen single-glazed Thermestra structural glass system, the 11-storey, glazed, central facade section of Norwich Union's offices in Leeds City Square forms an 11m wide rebated 'Z' shape, incorporating a 400m2 screen and two-sided glazed lift shaft. The 550 Hansen windows had punched-out water deflectors through the vest frame to ensure longevity of colour match and were triple-glazed with internal blinds to achieve a 'U' value through the frames of 2.9w/m2K and ...

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