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SH25A bridge: View from abutment D. Supplied: NZTA

SH25A Taparahi – first bridge beams arrive on site

The team received a big delivery last week – arriving on site were the first two sets of the bridge steel beams (girders). These range between 18, 29 and 30 metres long and weigh approximately 20 tonnes each. On site they will be spliced together to form the base of the bridge deck – for the first span (it’s a three-span bridge).

Soil nailing and mesh installation are ongoing – crucial work that is stabilising the slip face and helps to contain any potential debris from falling.

Other activities achieved last week include:

Abutment A: The team continue to tie the steel reinforcement for the wingwall, with the concrete pour due this week (see image below – right).

Abutment D: The first section of the headwall and plinths were poured last week, and the team will now start tying the steel reinforcement for the wingwalls.

Pier B: Completed and ready for the installation of the bridge beams (girders).

Pier C: The headstock was completed, and the plinths will be poured this week. This will mark the completion of Pier C ready for the bridge beam installation.

Offsite: 12 of 15 bridge beams have been delivered to site with the final three due to arrive next week. The concrete pre-cast panels and pre-cast barriers continue to be fabricated.

SH25A bridge strengthening

While SH25A is closed we’re working through a programme of work so it can be completed ahead of the reopening of the state highway. This includes strengthening seven bridges.

Our contractor is established at five sites along SH25A. Traffic management is in place which includes a 30km/h temporary speed limit and lane closures when scaffold is installed or removed. Work on the final two sites is expected to get underway soon which are on the western side (Kōpū).

  • Supplied by Waka Kotahi NZTA