Let's take a break from green for a moment and talk about orange instead. According to Frank Sinatra, orange is the happiest colour, although it's doubtful that colour psychology was his strongest suit. Traditionally, green is the colour of envy, but as everyone is no doubt aware, it's the colour that has become synonymous with caring for the environment.
At 12 Shelley Street in Sydney, green shares the limelight with orange the feature colour of American Express House. Developed as part of the King Street Wharf precinct by Brookfield Multiplex, the structure's unashamedly enthusiastic appearance is mostly the result of its exposed orange metalwork louvres, beams and a series of irregularly spaced blades, known variably as the fishing poles' or chopsticks' that sit just off the building's facade.
Designed by CoxCrone (a joint venture between Cox Architects and Crone Partners), the structure will add to Brookfield Multiplex's comprehensive portfolio of environmentally rated commercial office buildings, being designed to achieve a minimum of 4.5 stars from the Australian Building Greenhouse Rating (ABGR) scheme. American Express House sits at King Street Wharf between Brookfield Multiplex's 5-Star ABGR rated KPMG Building and the under-construction Macquarie Bank Building, which is pegged to achieve a 6-Star Green Star Rating. The 14,000m² of commercial net lettable area at 12 Shelley Street is leased solely to American Express for an 11-year term.
"Number 12 Shelley Street is the latest example of Brookfield Multiplex's commitment to achieving excellence in design, environmental sustainability and workplace functionality, while also showcasing our integrated property model. All of our key operating divisions played an integral part in the project's design, development, construction and ongoing management," says Gary Bowtell, developments director at Brookfield Multiplex.
Orange, says Nick Tyrrell, director at Cox, highlights the building's exterior environmental controls.
"These include a number of highly visible fixed and operable external sunshading devices on the building's eastern, northern and western facades, which are targeted to the relatively small areas receiving major heat loads, after allowance for the overshadowing effect of adjacent buildings. In combination with high-efficiency lighting and mechanical systems the building is designed to achieve a 4.5-Star ABGR rating."
The sunshading devices include the so-called chopsticks on the building's eastern side, which also play another significant environmental role. Due to the building's location a number of site-specific design solutions were required. One of the most obvious challenges was the proximity of the Western Distributor highway, which passes less than 2m from the structure at its closest point, around levels 3-4. Dealing with the sun's reflection from the glass and into the eyes of the drivers of the 150,000 northbound cars that pass by every day was critical.
"Due to a rare geometrical relationship between the site and the elevated highway there was a major reflectivity issue. In winter, when the sun is lower, there was danger of sunstrike affecting approaching cars. The uphill and corner section near the building accentuated the problem," says Tyrrell.