Glass used in Shanghai Tower

Shanghai Tower is the highest building in China,built in 2015, The building is 632 metres high and has 128 stories, with a total floor area of 380,000 m2 (4,090,000 sq ft). The building’s tiered construction is designed for high energy efficiency and sustainability,contains multiple separate zones ,such as office, retail and leisure use.

The Tower takes the form of nine cylindrical buildings stacked atop one another, all enclosed by the inner layer of the glass facade, which completes a 120-degree twist as it rises. Between the inner and outer layer of the facade are nine indoor zones that provide public space for visitors.

In recognition of the building’s sustainable design, Shanghai Tower Construction & Development received certifications from the US Green Building Council and China Green Building Committee.

Gensler is the tower architect, identified three key design strategies — the tower’s asymmetrical form, its tapering profile and its rounded corners – which would allow the building to withstand the typhoon force winds that are common in Shanghai. Using wind tunnel tests conducted in a Canadian lab, Gensler and structural engineer Thornton Tomasetti, refined the tower’s form, which reduced building wind loads by 24%. The result is a lighter structure that saved $58 million in costly construction materials.

The structure of the outer glass facade is: 12 mm Low-Iron heat strengthened glass + 1.52 mm SentryGlas® interlayer + 12 mm Low-Iron heat strengthened glass. The inner glass facade glass combination is: 6 mm Low-Iron glass + 0.89 mm SentryGlas® interlayer + 6mm Low-Iron glass + 12 Air + 6 mm Low-Iron glass.

Glass used in Shanghai Tower

More than 200,000 square metres of SentryGlas® interlayer is used in the double skin glass facades.The  reasons for choosing SentryGlas® as the interlayer were the enhanced strength that it provided to the overall glass assembly and the elimination of any edge delamination due to exposed glass edges in the structural silicone glazing. SentryGlas® also contributed to the overall sustainability of the tower by allowing a light coating to be used in conjunction with the interlayer for solar control.

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