- Type: Office Building
- 34 levels above ground (3 storey lobby), 2 basements
- Total floor area: 32,155 sqm
- Material: composite steel/concrete
- Support Structure: External columns and lateral bracing beams
- Location: Castlereagh Street in the centre of Sydney city
- Irregular,tight, landlocked site
- Open only to the East
- Ground floor is open to the public
- controlling sunlight with external louvres to the North and East
- Bold and expressed structural system
- Core is located at the perimeter of the site
- Clear rectangular area
- 6 col free spaces => manipulated as 1/3rd of each floor is a void
- provide all parts of the floor with some level of natural light from the atrium
- maximum integration of services to minimize ceiling depth to allow for a higher ceiling appropriate to a prestige office building
- As done by HELMUT JAHN in BARTLE EXHIBITION HALL
- Provided a small oasis in the middle.
- Favourable to the client: enabled them to build an additional five floors, under the FSR regulations at the time.
- Underground parking
- The building lacked adequate lateral stiffness -voids through the building restrict the opportunity to gain continuity within the structure
- Only possible on east façade => east wall-shear wall
- A composite system -faster construction, services penetrations through the beams and efficient spanning of the large grid.
- The floor system allows the office areas and glazed facades to be free of columns