Strengthening complete at SH39 Whatiwhatihoe Bridge

In News1 MinutesBy NZ Trucking magazineSeptember 22, 2023

Strengthening work on the Whatiwhatihoe bridge at SH39 south of Pirongia is now complete.

The 70-year-old concrete bridge was identified as requiring strengthening work to cope with modern traffic including High Productivity Motor Vehicles (HPMV).

Works involved an innovative strengthening solution, with a novel post-tension cable and anchorage system being a first for New Zealand, which allowed tensioning to take place while traffic continued to use the bridge. In addition to minimising traffic disruption, this new system also has environmental benefits by using less carbon-intensive materials.

The strengthening began in October 2022 and the only obvious sign that work has been underway is the presence of scaffolding underneath the bridge.

Over the coming weeks, the scaffolding will be gradually removed, which will see SH39 reduced to one lane at times, with Stop/Go traffic control in operation during this period.

Scaffolding will be removed over the coming weeks.