106 Wrights Rd Office Development, Middleton, Christchurch

Date: May 2012 – March 2013

Client: NZ Metropolitan Properties Ltd

Engineer: Kirk Roberts Consulting Engineers Ltd

Contractor: Armitage William Construction Ltd

A new three level commercial office building located on the corner of Wrights Road and Matipo Street and overlooking the Addington Raceway is due for completion in mid 2013. Designed to 100% of the new earthquake code the PRESSS (PREcast Seismic Structural Systems) building design incorporates post-tensioned concrete shear walls with replaceable energy dissipators and self-centring mechanism.

BBR Contech initially supplied Macalloy 1030 Grade 50mm starter bars incorporated in foundations and following erection of precast walls subsequently installed, coupled and tensioned all 16 № full height Macalloy 50mm bar tendons.

Bar tendons were connected with couplers at openings designed in the precast panels and tensioned from the top to 1300 kN. Tendons remain unbonded providing the ability for future load checks if required after significant seismic events.