Designed by Bates Smart, the 60-storey building is the most slender tower in Australia, rising 184 metres and built on a 480m2 site. This equates to a slenderness ratio of 16.5. By comparison, New York’s Steinway Tower (the world’s most slender skyscraper) has a slenderness ratio of approx. 24. The structural design eliminated perimeter columns by utilising a concrete H-frame. This comprises a 650mm thick eastern perimeter wall and 450mm western wall which are connected together by two similarly thick transverse shear walls.


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Collins House