73 Miller Street

North Sydney, NSW

Upgrade of the existing building to a
high quality A-Grade commercial office

Situated on a prominent corner location directly adjacent to North Sydney railway station, 73 Miller Street has been transformed into a high quality A-Grade office building with ground floor retail and 13 levels of office accommodation.

The refurbishment of the 30 year old existing building includes the extension of the floor areas from Level 1 to 11 and the addition of 2 levels to the existing structure.

Various construction types were explored in the early stage of the project to maximise the leasable area on each level. while keeping the weight of extension within the existing structure capacity. A mixture of post-tensioned concrete banded slab and composite steel structure was used in the final design scheme.

The layout and load path of the existing structure challenged the design team, where the floor layout and load-bearing elements change from level to level. Different structural designs had to be adopted on each level to produce a viable solution to meet the client’s requirements.

Advanced finite element modelling of reinforced concrete floor and wall systems was widely used on this project to reproduce the behaviour of the existing structure, to verify the existing and modified capacity, when subjected to the additional loads.

A new high performance façade was developed by the TTW façade team in association with architects Fitzpatrick + Partners and main contractors Buildcorp, to provide floor to floor glazing and enhance the views of Sydney Harbour.

Client: ESR

Architect: Fitzpatrick + Partners

Project Manager: Colliers International

Builder: Buildcorp

Value: $58M

Completion: 2020

Sector: Commercial/Industrial

Services: Structural, Civil, Façade