Tirohanga Whanui - pedestrian and cycling bridge

In the 1980’s, the SH1 motorway was constructed by excavating a large cut into one of the highest ridges in the area, severing Spencer Road which ran along the ridgeline. This project introduces a shimmering ‘noble red’ bridge, tying the original landscape back together. The Tirohanga Whanui Bridge (Te Reo Maori for panoramic views) is a spectacular multi-functional bridge constructed across SH1 on the North Shore of Auckland. Jointly funded by the NZ Transport Agency and Watercare Services Limited, it conveys a major water main across the motorway, and provides a shared walking and cycling path to encourage the community to walk and bike to school or work. The expansive views from the bridge at the top of Spencer Ridge extend out over the green hills of Auckland and Rangitoto Island, a culturally significant volcano that burst into existence 600 years ago. We’ve learnt about the cultural nuances of the area from artist, Graham Tipene, a descendent of local iwi Ngati Whatua. He guided us, and we listened, integrating his artistic concepts of the treasured valleys and ridges into the handrails and artwork imprinted into concrete. It was an engaging relationship that tied his work to ours and our work to his. In the architectural space, we worked with a local bridge architect, Jeff Wells. The design reflects extremely close collaboration between Jeff and our Aurecon Bridge Team, developing a vision together. There is subtle, considered, detailing of almost every element of the bridge, for example using parametric design to vary the steel truss shapes, angles and void radii, giving it a natural balance that responds to the stresses in the 104m long structure. Designed by Aurecon, it blends creativity and beauty through innovation. We are fascinated by bridges. We are excited about this bridge. We are proud of this design.

Language

  • English

Media Info

  • Pagination: 24p
  • Monograph Title: 9th Australian Small Bridges Conference, Surfers Paradise, Queensland, 1-2 April 2019

Subject/Index Terms

Filing Info

  • Accession Number: 01714766
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • Files: ITRD, ATRI
  • Created Date: Aug 26 2019 11:34AM