Adelaide Arbours

“High complexity, high profile & high stakes in the heart of Adelaide”

Executive Summary

As part of the multi-million-dollar redevelopment of Adelaide Festival Plaza – including two 45,000sqm office towers – Walker Corporation was also responsible for delivering the adjoining public realm for the State of South Australia. On the recommendation of ASPECT Landscape Architects, Fleetwood was shortlisted for a competitive design tender. We were subsequently appointed by Walker Corporation in July 2021 to develop, prototype, fabricate and install a series of 16 spectacular and highly intricate hexagonal arbours. Faced with significant time pressures and intense public scrutiny, the first six arbours were successfully delivered in January 2022 – two months ahead of schedule. The remaining 10 arbours are scheduled for completion in 2023, as part of Stage 2 of the Plaza.

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Client

Walker Corporation & South Australian Government

Completed

2022

State

SA

Design Partners

ASPECT Landscape Architects & Renewal SA

Fleetwood Involvement

Our initial tender for Adelaide Festival Plaza outlined our overall approach to the design and delivery of the arbours. Guided by feedback from Walker Corporation, we then developed a detailed drawing set, concepts, construction methodology and budgets. These were approved and we were formally appointed. From design and detailing to fabrication and on-site installation, the process was highly collaborative with the Walker Corporation team heavily invested in the successful delivery of the arbours. Project meetings took place regularly with updates provided by relevant members of the Fleetwood team. The excellent organisation of the Walker development team was also hugely beneficial to the outcome, as it meant we always knew exactly what was going on. Together with our streamlined DesignExcute2™ delivery process, it meant we were able to complete the first six arbours on brief, vision and budget – two months ahead of time.

Community Engagement

Given the high profile of Adelaide Festival Plaza, considerable community consultation was undertaken by Walker Corporation and the SA Government. A range of design options were put forward for the arbours before Fleetwood was engaged on the project.

1

When Walker Corporation first came to us, they had an arbour design (and prototype) they were not happy with. Our challenge was to capture the intent of their original concept, but in a way that could be confidently delivered in the real world. With the project already behind schedule, time was firmly against us. We had to work hard – and quickly – to revitalise the existing design aesthetic, ensuring it was neat in detail and all elements would work perfectly together. The bespoke hexagonal design, in particular, was highly intricate with a complex mosaic of perforated mesh panelling. A new full-scale prototype was also required to ensure the revised drawings were able to be built exactly as they appeared on paper.

2

Fabrication was the most complex element of the entire project. Due to the precise levels of detail and sheer volume of work, it required double shifts and a highly-systematic approach. To achieve the unique shape, we set up a large bespoke jig in the factory (essentially a stencil) where small sections of laser-cut steel beams were laid out to form each of the hexagonal panels, before being transferred to the welding team for joining. This process was repeated over and over until there were enough hexagonal sections for each complete arbour. Careful consideration was also given to load bearings, with detailed drawings showing exactly how the structures should be loaded onto trucks and transported in sections – firstly to Geelong for painting, before making their final journey to South Australia. The challenges then continued on site, with massive weight-bearing slabs under each of the steel structures calling for ultra-accurate detailing and anchor points. The Plaza itself was also tightly regulated and very busy with live construction taking place around the installation team, requiring a high level of care and coordination at all times.

3

A key part of our original response to Walker Corporation was for the arbour structures to be designed with the least number of parts, streamlining their delivery to Adelaide and minimising the amount of time needed on site. A series of innovative processes were also implemented during the fabrication stage to optimise outputs on the factory floor – essential to balance the significant volume of work with the limited amount of time we had available to do it. Ultimately, the arbours were transported in pre-assembled sections. But first we needed to put the sections through a ‘dry run’ in our factory, making subtle refinements to ensure they would fit together perfectly. This allowed the trunks of each arbour to be quickly installed in Adelaide, before cherry-pickers were used to attach the final perforated panels.

4

  • Custom hexagonal design supported by intricate detailing
  • Interconnecting roof lines between each arbour form a larger visual canopy (even though they never physically touch)
  • Perforated mesh paneling provides creative shade and shadow play across the Plaza
  • Neatly integrated cabling supports plantings and maximises shade opportunities
  • Seamless fixings where arbour trunks meet the cantilevered sections
5

  • Square hollow section steel (painted)
  • Perforated aluminium mesh panelling
6

Detailed installation methodology was provided as a key part of our original submission to Walker Corporation. This included comprehensive safety and design reporting to certify the arbours were fit-for-purpose in what is a high-traffic location in the heart of the Adelaide CBD. Wind tunnel testing was also conducted to ensure the arbour structures wouldn’t generate unwanted noise in blustery weather.

7

Adelaide Festival Plaza is one of South Australia’s most significant urban infill projects, providing a direct and activated connection from the CBD down to the banks of the River Torrens. With thousands of workers and visitors set to use the world-class precinct every day, the new arbours provide the ideal chance to stop, relax and take a break. Their striking design also provides a fantastic backdrop for photo opportunities!

8

Part shelter and part artwork, the arbours are the perfect fusion of form and function. They provide much-needed shade, while also delivering an architectural boldness that catches the eye and imagination. In one of Adelaide’s busiest public spaces, they offer a connection to nature and a level of intimacy that offers welcome respite from the surrounding offices and cityscape, all year ’round.

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