Key facts:

  • Client: AMP Property Portfolio Ltd / PSPIB Waiheke Inc.
  • Structural design: Eliot Sinclair & Partners Ltd
  • Contractor: HRS Construction Limited
  • Size: 33283m2



Northwood Supa Centa is a large 33,283m2 shopping centre in Christchurch, that is home to a number of ‘big brand’ retailers. The centre experienced structural damage and liquefaction induced ground deformations following the 2010 and 2011 Christchurch earthquake sequence. Eliot Sinclair were engaged to provide engineering design services for the seismic strengthening of the building to 100% NBS (New Building Standard).

The project involved the structural strengthening of the existing shopping centre building structures plus ground improvement work which was required to both relevel the buildings and mitigate liquefaction potential of the site.

The project was required to meet significant operational challenges due to the shopping centre’s large floor area, and the client’s request for work to be carried out with minimal interruption to retail trading.

Eliot Sinclair’s involvement included the structural design and construction monitoring for;

  • Structural Strengthening including installation of new roof bracing systems, portal frames, wall transoms and braced frames.
  • Floor Diaphragm strengthening using a carbon fibre overlay.
  • Structural repairs including, wall panel crack injection and spall repairs, replacing sections of floor
  • Repairs to services, including stormwater, sewer and pavement replacement.
  • Working in conjunction with Mainmark to specify, develop and monitor the relevelling and ground improvement works.