Structex was engaged to design the temporary works to enable both the construction of the new Motu bridge, and then the subsequent demolition of the original 1920s single-lane bridge.

This involved a creative self-supporting cradle system which removed the need for substantial propping when casting the piers, as well as lifting plans and careful cross-reviews of designer and contractor methodologies. A key challenge which was overcome was ensuring the stability of the original structure when parts were being cut and removed to maintain a safe site for those carrying out the demolition works.

Visit Waka Kotahi's website for more information about the project and below a short video they created.

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