The superstructure stem comprises concentric braced steel lattices linked at intermediate levels with radial frames.
The double curved form is inherently rigid and the minimal use of material is achieved by optimising section sizes with a suitable search algorithm.
Photovoltaic cells are integrated into the façade.
The even flow of forces through the superstructure hull is directed into the base level transfer structure using a hierarchy of member sizes arranged according to Myron Goldsmith's superframe concept for very tall buildings.
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