Text that reads "A-Frame Structures" in large black font on a white background.
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A-Frame is a New Zealand structural engineering consultancy specialising in bridges and civil infrastructure. We focus on practical, buildable design with clear documentation, efficient analysis, and solutions that work on site.

Contact Us
  • A winding two-lane road crosses a dam in a lush, green, hilly landscape with trees and grass on the hillsides.

    Kererū Gorge Culvert

    Design of a 15m steel and reinforced concrete arch structure to reinstate Kereru Rd over the Whanaukini Stream, following Cyclone Gabrielle washout

    Roundel Civil Products (client)
    Hastings District Council (owner)

  • A gravel road under construction that leads to a small bridge over a creek in a forested area. Orange cones and a metal railing block access to the bridge, with a white vehicle parked on the other side. There is a sign on the left side of the bridge, and a person is walking on the right side.

    George Creek (Wellington Water)

    Design of a 12m steel composite girder bridge providing access to a water intake, working with Bridge It we realised significant savings for the client vs their original design solution

    Bridge It NZ (client)
    Wellington Water (owner)

  • A partially constructed pedestrian suspension bridge over a rocky and muddy terrain with snow-capped mountains in the background.

    Buckler Burn Suspension Bridge

    Design of a 48m suspension bridge over the Buckler Burn stream, south of Glenorchy

    Abseil Access (client)
    Glenorchy Trails Trust (owner)

  • A wooden deck with two benches, surrounded by rocks and a bamboo fence, overlooking lush green trees and hills.

    Te Waihou Blue Springs Walkway

    Design of boardwalk and retaining structures on the upgraded Te Waihou walkway, including cantilever sections over the Blue Spring

    Gray Matter Ltd (client)
    South Waikato District Council (owner)

  • A bridge over a stream in a mountainous area with green hills, partly cloudy sky, and trees along the riverbank.

    Wairarapa Br 40

    Design of a 16m span prestressed concrete bridge providing maintenance vehicle access to the Wairarapa Line

    Bridge It NZ (client)
    KiwiRail (owner)

  • Under construction yard on waterfront with excavators, soil, retaining wall, and house nearby.

    Wallis St Sea Wall

    Design of a mass block seawall retaining a residential property in Raglan

    Gray Matter Ltd (client)
    Private resident (owner)

  • A bridge crossing over a muddy river surrounded by green trees and foliage.

    Kopaki Bridge

    Capacity assessement of the existing 3 span steel composite local road bridge, circa 1950s, to allow HPMV to cross

    Forestry Management NZ (client)
    Waitomo District Council (owner)

  • A suspension bridge with a yellow walking surface under a clear blue sky in a rocky outdoor area with hills.

    Koolan Island Bridge

    Design of a 72m long swing bridge in Western Australia, to reinstate access for mining personnel

    Abseil Access (client)
    Mount Gibson Iron (owner)

  • A wooden bridge under construction with scaffolding around it, over a small creek in a grassy area.

    Bellfield Boardwalks

    Design of pedestrian and cyclist access boardwalks, as part of a residential development project

    Bridge It NZ (client)
    Papakura Developments (owner)

  • Suspended chairlift over a river, surrounded by lush green and some brownish trees in a forested area.

    ESNZ (NIWA) Cableway Inspections

    Inspection of cableway structures used for river flow monitoring

    Abseil Access (client)
    Earth Sciences New Zealand (owner)

  • A small bridge with wooden railings over a creek next to a highway with street lamps, trees, and distant hills under a partly cloudy sky.

    Mangaone Bridge (KCDC)

    Design of a 10m span bridge to provide pedestrian access over the Mangaone stream on the revocated SH1

    Bridge It NZ (client)
    Kāpiti Coast District Council (owner)

  • Wooden and wire mesh footbridge in a park surrounded by trees and fencing.

    Hamilton Zoo

    Design of boardwalk access and viewing platform structures at the Hamilton Zoo

    Keir Projects (client)
    Hamilton City Council (owner)

  • A small bridge over a narrow stream in a grassy landscape under a cloudy sky, with a sign on the bridge that reads 'BRIDGE IT NZ'.

    Roslyn Bridge, Drury

    Design of a 15m steel girder pedestrian bridge as part of the Drury South development

    Bridge It NZ (client)
    Drury South Crossing (owner)

  • Under construction of a large underground concrete storm drain or utility box with tools inside, at a construction site with excavation and safety barriers in the background.

    SH1 Taitarakihi Culvert

    Design of a 6m span reinforced concrete box culvert, carrying State Highway 1 over the Taitarakihi Stream

    Hynds Pipe Systems Ltd (client)
    NZ Transport Agency (owner)

  • A wooden pedestrian bridge with metal railings over a small creek, leading to a grassy area with trees and rolling hills in the background under a partly cloudy sky.

    Te Aroha Golf Course

    Design of a 15m span steel-timber pedestrian bridge for access over a small stream

    Bridge It NZ (client)
    Te Aroha Golf Club (owner)

A man standing outdoors on a trail in a forest, wearing a green mountain jacket and a plaid shirt underneath.

About Us

Simon Devoy is a Chartered Professional Engineer (CPEng) with experience in bridge and civil structural design, assessment, and construction support across New Zealand. His work includes bridges, culverts, retaining and marine structures, and small non-standard buildings linked to infrastructure. He is familiar with NZ Bridge Manual requirements, relevant NZS/AS standards, and council procurement and consent processes. All engineering work is senior-led from concept through to delivery.