Old St Pauls Seismic Upgrade

Old St Pauls Seismic Upgrade

June 2020
$2M
R&D Ltd

Old St Pauls is one of New Zealand’s greatest heritage places, and a much-loved icon of Wellington. Constructed from fine native timbers, it is considered one of the best examples of Gothic Revival architecture in the world.

Like many buildings in the Capital, Old St Pauls was affected by the strong shaking of the 2016 Kaikoura earthquake, widening by between 15cm and 100cm in places. To protect the cathedral for the future, Maycroft was engaged to undertake structural strengthening to the buildings’ interior, repair cracks and repaint the exterior and undertake fire and electrical upgrades.read more

Retaining the character of the Category 1 Heritage Building is vital, so Maycroft has worked with designers to ensure all structural steel for the seismic strengthening is hidden inside existing framing or other details and any timber cut away replaced with old natural timber to match. Sprinklers are hidden or painted to remain discrete.

The former cathedral’s wooden construction makes it naturally more flexible and resilient, however it was built using a "mortise and tenon" (a mortise and tenon joint connects two pieces of wood, mainly when they are at right angles) technique - meaning there was nothing to hold joints shut. This offers a great benefit in the seismic upgrade works, enabling Maycroft to retain much more of the heritage fabric and simply augment what is already there.

The cathedral is delicate, and our team has had to plan and execute works with the utmost accuracy to prevent any damage to heritage features such as organs, stained glass windows and columns. Old St Pauls has undergone several different alterations over the years, so it has been challenging working with the various construction technique used.


Location

Awards

2021 Commercial Project Awards - Gold Certificate

Judges Comments "Old St Paul’s an iconic, 150-year-old Wellington Category 1 Heritage Building was damaged in the 2016 Kaikoura Earthquake, which moved the walls out by up to 100mm in places. The judges were very impressed with the collaborative approach taken in the contract procurement which was a contributing factor to the success of the project".

2021 - Commercial Project Awards National Category Winner

Judges Comments "The structured approach to the repair carried out by the structural engineer was another key factor in the success. Together with the project manager and the client, they developed a well-thought-through early works package in consultation with a preferred contractor, who was successful in winning the main contract works package. This highlighted the benefit of a collaborative trust-based team approach to the judges. The senior site foreman played a significant role in the project success and undertook a lot of the prototyping personally. ?The team valued his contribution to this iconic New Zealand heritage building. He will always be remembered for the key role he played".

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