the façades . The lower floors , which include the auditorium , received an off-shutter concrete finish while the top floors are clad in a lightweight aluminium finish .
Externally the auditorium forms a concrete box cantilevering from a much smaller base while being tied back to the main building . This feature required careful design considerations to make it appear as though it was a floating section : all walls contain beam structures designed to carry lateral loads , with the underside of the box enclosing the racking steps of the atrium floor .
The large span walkways crossing the atrium at two different levels required special consideration in hiding the true section depth and the intricate shape in the bulkhead structure . Reinforcement and longer propping of the walkways limit the long-term deflection and possible vibrations due to the span to depth ratio .
Façade Each façade has a unique appearance to address sun exposure and traffic noise . The building ’ s massing has been shaped to achieve its highest level at the corner of the busy roads , as well as being more open towards the remainder of the site from where visitors to the building will arrive . Concrete was used to give the building a solid two-storey base with lightweight glazed aluminium shopfronts . The aluminium in-fill panels are framed by folding concrete planes which reinforce the robust appearance of the new head office building .
1ST FLOOR
3RD FLOOR
6TH FLOOR
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