Lend Lease’s Barangaroo development in Sydney features three residential towers in the order of 70, 58 and 30 storeys in height, across what is known as Site 1B. The towers share a common four-level basement (in the order of 12,000 square metres per floor) with a public park of some 8,000 square metres at ground level. The three towers are planned to feature worldclass quality apartments with spectacular views across both Darling Harbour and Sydney Harbour, given some of the apartments are up to 250m above ground.

Extensive works and re-planning within the existing 399 Bourke retail zone were required with the design team to ensure the structural integrity of the existing structure was maintained and the client’s expectations realised.

Robert Bird Groups involvement

Robert Bird Group is proud to be the permanent structural and temporary works engineers for the entire development which is currently under construction.

The structural solutions for the towers:

  • Achieve high floor plate spatial efficiency.
  • Optimise views of Darling Harbour and Sydney Harbour.
  • Minimise extents of piling, which minimises costs and construction time.
  • Controls slab deflection to support glazed façades.
  • Minimises the overall mass of the buildings.
  • Reduces earthquake loads and core reinforcement costs.
  • •Controls lateral drift from wind loads to maintain occupant comfort.

Project Metrics

Year Completed:
Building Metrics:

  • Tower 1 – 70 Levels + 4 basements
  • Tower 2 – 58 Levels + 4 basements
  • Tower 3 – 30 levels + 4 basements


Project Metrics

Enironmental Performance

  • 4 Star Greenstar
  • 4.5 Star AGBR

Renzo Piano
Robert Bird Group Services:
Structural Engineering

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