• Capabilities: Engineering, Structural Engineering, Facade Engineering, Electrical and NBN Design
  • Sectors: Commercial Developers

One William Street

Brisbane, Queensland, Australia - One William Street is a commercial building, located in Brisbane’s CBD. The development features premium grade finishes, an iconic lobby, and plenty of open space to encourage community activity.

44

level office tower with 3 basements

267m

high, making it the tallest commercial building in Brisbane

Arcadis and Multiplex worked together on this project to design an efficient concrete structure that met the design criteria, made the construction process easier and faster, and improved construction safety standards.

The project brought a number of challenges including the fact that the 267m high tower is located on a steep site, approximately 50 metres from the Brisbane river. The design of the basement shoring had to address the natural ground batter, as well as potential groundwater inflows from the river.

On the southern end of the site, a secant piled wall solution was adopted to provide cut-off to potential water inflows into the site. For the rest of the site, a conventional bored pile with a shotcrete infill system was adopted.

The durability issues involved acid-sulphate soils and groundwater salinity on the basement foundations and retention structure. Concrete mix designs were specific to the environmental factors presented by the site, while ensuring the 50-year design life was achieved.

Other unique techniques implemented included the design of the level 3 transfer structure as beams on the perimeter of a curved building, the extensive use of self-climbing formwork systems to enable fast floor cycles, and the use of pre-fabricated reinforcement cages for the basement foundations, columns and the level 3 transfer beam structure.

The level 3 transfer structure incorporated 385 tonnes of reinforcement that needed to be placed and tied. To minimise safety risks, reduce time and cost, prefabricated beam reinforcement was placed in sections to achieve the desired result.

The use of prefabricated beams helped minimise site-based labour, reduced risks to safety, and accelerated the construction time. 

The extensive use of advanced design techniques, self-climbing formwork systems, pre-fabricated reinforcement cages, and unique concrete mix designs led to the timely and successful delivery of this large commercial building, which is an example of excellence in concrete.

Outcomes

44

level office tower with 3 basements

267m

high, making it the tallest commercial building in Brisbane

5th

tallest building in Australia

Questions about this project

Gareth Robbins

Senior Managing Director – Property, Energy and Resources Ask me a question