Residential Bridge Replacement
Bridge It NZ had a client with a problem: the client’s primary property access was across an old, unsafe, deteriorated bridge on private property. Tiaki Engineering Consultants were to design a replacement structure.
The primary objective of the residential bridge replacement project was to span the 2-3 m deep gully which bisects the property. No alternative access to the dwelling was available. Given that this bridge is on privately-owned land and for residential use, simplicity and project cost were important factors to consider.
During evaluation of the site TECL realised that an appropriate design could avoid two significant regulatory hurdles; flood risk assessment and building consent. The former was achieved through direct liaison with the local council, by providing expert advice based on the existing site conditions. Building consent exemption was possible primarily due to the short span.
TECL designed a 6.5 m x 3.6 m Prestressed Concrete Deck Bridge, including cast-in-situ concrete abutments on driven steel piles and galvanized pipe handrails with kerbs. The design met NZTA Bridge Manual requirements for 0.85HN (‘Class 1’) loading, allowing access by larger vehicles such as laden concrete mixers and milk tankers.
Bridge It NZ completed construction of the residential bridge replacement project in January 2023, adding significant value and utility to the property.
|Project name:||Residential Bridge Replacement|
|Client:||Bridge It NZ|
|Structure:||6.5m x 3.6m Precast Concrete Deck Bridge|
|Project Partners:||Bridge It NZ|
Our breadth of specialised knowledge has allowed us to provide and oversee unique and practical design solutions for a wide range of projects across the North Island, and as far as Scott Base, Antarctica.
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