Quay Quarter Tower – Sydney, New South Wales


Sydney, New South Wales



AMP Capital


BG&E Sydney
Quay Quarter Tower

BG&E worked closely with both the builder Multiplex and developer AMP Capital on the transformation of the existing commercial building at 50 Bridge Street, known as Quay Quarter Tower (QQT), in the heart of Sydney.

BG&E is providing structural and construction engineering (including permanent and temporary works) and materials testing (including highly complex modelling and analysis) services.

QQT is a hallmark of world-class engineering and ingenuity. The 216-metre tall redevelopment of the existing building required demolition of the existing structure, while retaining over 60% of the core. New floor plates were then placed over the height of the structure.

Our team worked collaboratively with consultants and architects to simultaneously design and build, while Multiplex worked in several locations to demolish and rebuild – connecting new floor plates to the existing core of the building, all of which is unique for a building of this scale.

The architectural design by 3XN of a “vertical village” gives the appearance of five separate shifting glass volumes stacked upon each other.

Some of the key features of the redevelopment include:

  • eight-metre high floor in one section of the building with impressive atria connected by spiral stairs;
  • eight-to-15-metre high column grids;
  • composite columns (concrete filled steel tubes);
  • composite floor construction;
  • demolition of approximately one-third of the existing floor plate over full height of building to allow for significant floor plate extension works to be undertaken;
  • irregular/varying floor plates in the building;
  • extending and strengthening of the existing core for lateral stability; and
  • raking columns forming part of complex transfer structures with columns being hung from the roof across more than 20 floors.

The 49-storey tower is part of Sydney’s newest contemporary neighbourhood Quay Quarter Sydney, which is built over two city blocks. The neighbourhood includes luxury residential apartments built by Richard Crookes Constructions, boutique retail, green spaces and artisan cafes and will serve as a state-of-the-art destination only metres from Sydney’s stunning harbour foreshore.