The Te Ara Pekapeka bridge in Hamilton has been named Supreme Winner at the Steel Construction New Zealand (SCNZ) Excellence in Steel Awards, taking the top prize in the Over $3 Million Project of the Year category and being recognised as the standout steel construction achievement in New Zealand for the year.
The project was delivered by a team that included Culham Engineering, Eastbridge Ltd, and HEB Construction, with Hamilton City Council as the client. SCNZ judges described it as a visually stunning structure that makes clever use of weathering steel for an elegant, durable construction that will age naturally and require minimal maintenance over its design life.
The Engineering Challenge
The numbers behind the Te Ara Pekapeka reflect the scale and complexity of the project. The bridge spans 215 metres in total. The southern pier weighed 228 tonnes; the northern pier 241 tonnes. The total weld length across the fabricated steel sections exceeded 1.4 kilometres. The box section at the heart of the structure measures 2.2 metres by 0.82 metres, with steel plate thicknesses ranging from 30 to 50 millimetres.
Installation required one of the largest crawler cranes in New Zealand operating in superlift mode — a configuration that allows the crane to handle loads at the outer edge of its capacity through the use of additional counterweighting. The logistics of moving steel components of this size to a river crossing site in the heart of Hamilton required detailed planning and coordination between the construction team, the Crane Association, and local authorities.
Weathering Steel: A Material Built for Longevity
The choice of weathering steel for Te Ara Pekapeka reflects a design philosophy focused on long-term performance over the project lifecycle. Weathering steel develops a stable patina of surface oxide that protects the underlying metal from further corrosion, eliminating the need for ongoing protective coating maintenance in appropriate environments. The aesthetic effect — a warm, naturally textured finish that changes character over the years — also gives the bridge a presence that painted steel would not achieve.
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