This 7‑storey building in Wellington’s CBD was scheduled for a major redevelopment, transforming it from commercial office space into residential apartments. As part of the upgrade, a new structural core was planned to be constructed through the existing concrete floors. The building, originally designed in 1965, was known to contain post‑tensioned (PT) slabs, but historical drawings provided limited and unreliable information. To safely progress the redevelopment and seismic strengthening works, a detailed investigation of the existing PT system was required.

  • Customer/Owner:
    Kent Terrace
  • Engineer
    Spectrum Consulting Engineers
  • Works period
    October 2017- October 2017

Freyssinet Scope

  • Identification of PT duct locations within existing concrete slabs
  • Verification of duct depth, alignment, and condition
  • Inspection of grout quality and tendon condition
  • Confirmation of tendon quantity and diameter
  • Night‑shift operations to avoid disruption to daytime office tenants
  • Ensured full business continuity throughout the investigation

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