Wynyard Place – Shell House

CBD, Sydney

Permanent and Temporary works design of the internal structure for the Shell House building forming part of the Wynyard Place development.

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: Multiplex

Architect: Make Architects

Builder: Multiplex

Value: $1B

Completion: 2020

Sector: Commercial, Retail

Services: Heritage, Construction Engineering, Structural