Eckersley O’Callaghan working on 40-storey building in city’s Central Station district

London firm Eckersley O’Callaghan is carrying out structural and façade engineering work on the world’s tallest hybrid timber tower.

The 180m high building in Sydney will become the new headquarters of Australian software firm Atlassian.


Designed by New York based architect SHoP and local firm BVN, the 40-storey tower (pictured) features a glass and steel envelope supporting a largely timber interior.

The tower’s 40 storeys will be divided into 10 timber ‘neighbourhoods’ of around four floors each, with each one separated by a so-called mega floor attached to the steel facade. It will house 4,000 Atlassian employees when complete.

The building will operate on 100% renewable energy on day one according to Atlassian, which has pledged to reach net-zero emissions by 2050.

Solar panels will be built into the facade, while inside, natural ventilation and planted terraces add to the tower’s green credentials.

The scheme is being built in the Central Station district which also includes a new station of the same name, co-designed by John McAslan & Partners and being built by Laing O’Rourke under a A$995m (£526m) deal.


The roof of the building