Restoring a Community Landmark: The Old Māngere Bridge Replacement

Nestled amidst the vibrant cityscape of Auckland, New Zealand, the Old Mangere Bridge stood as a cherished symbol of community connectivity for over a century. However, time and wear had taken their toll, necessitating the replacement of this beloved landmark. Waka Kotahi NZ Transport Agency embarked on an ambitious project to create a new and improved walking and cycling connection that would honor the bridge’s legacy while establishing a new iconic landmark for the area.  Construct n3D completed the steel fabrication shop drawings and coordinated much of the onsite works with the benefit of a live asbuilt 3D model.

Technical Triumphs Amidst Complex Challenges

The project presented a unique set of challenges due to the scale and complexity of the geometry. The arch, with its variable geometry and deck cambering, demanded meticulous planning and execution. The coordination of in-situ concrete piers, precast panels, and balustrades into the steelwork aesthetic required exceptional precision.

The team meticulously planned the lifting of the steelwork over water to avoid interference with nearby transmission lines. Ensuring the precise alignment of all arch segments was crucial, as any discrepancies could compromise the structural integrity of the bridge. Point cloud scanning technology was employed to verify the lengths of the segments, ensuring their ability to form the arch seamlessly.