The world’s largest timber-hybrid building under construction — dubbed the “timber building inside a much larger building” — is attracting global headlines, with five floors left to top out and glazing crews pushing upward through the tower’s lower half while workers complete the tiered crown above.
Slated to open later this year, the $1.45 billion, 39-storey ‘plyscraper’ will eventually contain more than 30,000 cubic metres of timber — shipped by European giants Stora Enso and Wiehag — across 21 storeys of the tower, with seven four-storey’ timber habitats’ sandwiched between steel-and-concrete mega floor plates above a seven-storey concrete podium.
And the glass panels going up are anything but conventional.
Spanish BIPV manufacturer Onyx Solar — working through Australian building products supplier Metz — is installing 1,794 crystalline silicon solar louvres across the tower’s active facade as part of a bespoke 247 kWp system. Speaking to PV Magazine Australia earlier this month, Onyx Solar revealed that each unit carries 28 mono-crystalline cells in a 4+4 mm glass configuration and produces 138 Wp at peak output. “The louvres also form a self-shading system that cuts direct solar heat gain internally,” Onya Solar said, turning the tower’s skin into a “vertical power source.”
Designed by BVN and New York-based SHoP, each ‘habitat’ comprises four floors of timbered space stacked inside a steel exoskeleton, eliminating the need for internal columns. “The timber floors are connected to the concrete floors via drag straps,” said Tim Allen, timber structural lead for TTW, who spoke at Timber Construct — Australia’s only timber construction conference — in late 2024. “Why build a 39-storey building partly out of timber?” Allen said. “Because it comes down to using the right timber for the right application.”
Whilst in October last year, Peter Morley, the Dexus project director overseeing the build, said the team had “broken the back on the most technical, structural phase of the project,” with the hybrid timber approach allowing the developers “to bring the building up quicker and get the façade on quicker than a more traditional build.”
“That’s because we’re jumping up five levels every time, and while we’re going up, we’re coming back and infilling with the timber within each of those five-storey zones,” Morley said. Atlassian Central is co-owned by Dexus and Atlassian, with Built and Japanese construction giant Obayashi appointed as builders, confirming the building remains “on schedule” for a 2026 opening, with the tech giant expected to take over five of the seven habitats in late 2028 following a full fit-out.
At street level, crews are also well advanced on a new pedestrian connection from Railway Colonnade Drive to the Devonshire Street Tunnel entrance — the heritage passage running beneath Central Station between Lee Street and Devonshire Street — which will, for the first time, allow pedestrians to access the tunnel directly from the colonnade as part of Central’s broader Third Square redevelopment.
