Wynyard Place

CBD, Sydney

Wynyard Place development includes Shell House, 285 George Street and Wynyard Tower projects.

CBD Commercial Development.

  • Heritage façade retention (Shell House and 285 George Street).
  • Heritage clock tower retention (Shell House).
  • Staged load transfers (Existing-Temporary; Temporary-Permanent (Shell House).
  • Complex sequencing and close coordination with the contractor’s team at Multiplex.

Temporary Works key features:

  • Transfer of 400t Heritage Clock tower from existing columns to the temporary support system and demolition of the existing support structure.
  • Suspended 400t Heritage Clock tower, eccentrically supported over live demolition/construction site.
  • External Façade retention trusses integrated with scaffolding and hoarding design.
  • Central Stability core with integrated suspended crane base.
  • Stability Core concrete encased steel plunge piles, de-cased and braced as excavation progresses for 12.5m below existing basement level.
  • Stability core stabilised utilising the mass of the offset clock tower through 2 levels of outrigger beams.
  • Additional stability provided by thrust braces into the excavated sandstone face and integrated into permanent shoring walls and façade support columns.

Permanent Works key features:

  • Offset new concrete stability core.
  • Permanent geotechnical loads resisted through basement diaphragm slabs.
  • Engagement/Disengagement sequencing from the temporary stability system.
  • New basement levels including substation and car parking.

Integration with adjacent Wynyard Place Tower development car parking.

  • Crane to be relocated on top of new permanent core walls.
  • Composite steel new permanent slabs.

Client: Brookfield

Architect: Make Architects and Architectus

Builder: Multiplex

Value: $1B

Completion: 2020

Sector: Commercial, Retail

Services: Heritage, Construction Engineering, Structural

Shell House Awards:

  • Australian Construction Award – Regeneration Project of the Year
  • Australian Construction Award – Australian Build Excellence Award

Images © Architectus and Skyview.