A design viewed as “unbuildable” by many building firms, Advanced Substructures entered partnership with PACT construction to deliver the 6 floors of premium office space, a café/lobby level and 2½ full site basement levels for this prestige project.

The difficult site and several distinct challenges required careful consideration of the sequence and methods of construction used.

This stunning project was commenced September 2015 and completed in 2017.

Key Challenges

Awards

The proposed basement extended 3½ metres below the water table
 

Impact of construction on heritage and vulnerable buildings on three sides (including iconic St Georges Cathedral and Deanery buildings)

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Restricted site access provided limited schedules and pathways to construction

Sole accessway to site shared with neighbouring office building and required to be maintained open during course of construction

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Impact of construction on busy retail district and council works on adjoining Pier Street added to environmental concerns

Below water table substructures delivered on time and dry
 

Perimeter walls built within 40mm of adjoining heritage listed buildings without damage
 

Shared access to neighbourhood laneway maintained during construction

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All construction limited to site footprint
 

Waterproofing without use of membrane

For more details click video below

This project was the subject of a Masterclass for the Concrete Institute of Australia (WA) on August 13, 2019, entitled "Piling, Basements and Foundations" presented by Advanced Substructures' Chairman Peter Airey, along with collaborators Steve Ball, Construction Manager of PACT, and Tim Palmer, General Manager of GFWA.

Read about the Design, Construction and Detail here :