The building demands attention. Completed in 2016 and over one hundred and fifty metres tall, EY Centre, 200 George Street in Sydney, Australia, stands out for its striking exterior. As described on www.skyscrapercenter.com, “…it appears in the city as a tower made of timber rising out from the grayness of its neighbours.”
CPP played a major role in the structural and comfort integrity of the building’s design, a feature that saw EY Centre become a winner of numerous awards.
“This was a successful project for us,” said CPP’s Peter Bourke, a member of the engineering team, “but also quite challenging.” Like many CBD developments, CPP had to consider strong winds and their effect on the target building and neighboring objects. EY Centre is part of a multi-structure, integrated laneway, with buildings of many heights, public passages, and outdoor features such as wine bars, cafés and kiosks. CPP tested for pedestrian comfort as well as structural and cladding design. “Structural load testing made sure the entire tower could withstand wind forces,” said Bourke. “We also examined loads on core, and how people inside would experience any wind-induced movement.”
The project involved an extensive team of two drafters, three engineers, three model builders, and two wind tunnel technicians. The team built a scale model of EY Centre, along with neighboring buildings, some in existence, but some on blueprints only. The primary model’s exterior was equipped with hundreds of pressure sensors and exposed to 360° of wind tunnel forces. The findings influenced design.
The project came with the unexpected. “Many aspects were moving targets,” said Bourke. “A Two hundred and fifty metre building, to be located immediately adjacent to EY Centre, remained in the drawing-board stage.” Wind interaction between the two buildings became a major topic for study and recommendation. “Some specifications were in flux, which required us to test for many eventual outcomes spread out over multiple phases.” As a result, CPP’s role became iterative. “We would test, submit recommendations, the architects and engineers would revise, and we would test again. This repeated for multiple cycles until we achieved our goals.”
CPP remained involved with the project for almost a year to ensure its success. Learn more about EY Centre