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Structural steel

Engineering design, steel fabrication & installation across the Coromandel and Waikato.

Alted Engineering provides end-to-end engineering design, fabrication, and installation from our base in Tairua, serving the Coromandel and Waikato.

From structural steel and commercial builds to custom gates, fences and balustrades, trailers and vehicle fabrication, staircases and other steel projects – we deliver solutions that are fit for purpose and built to last.

Led by engineer and owner Bennet Gage-Brown, our team combines 20+ years of design and fabrication expertise with hands-on craftsmanship. Whether it’s structural steel supply and install, a tailored trailer, or bespoke architectural detailing, Alted is your trusted partner for steel solutions that work.

Based in Tairua. Working across the greater Waikato, from north of Whitianga and across to Hamilton.

Engineering design

Led by a certified SOLIDWORKS engineer with 20+ years of experience, we bring transport-industry precision to every project. From custom trailers and heavy-duty builds to bespoke architectural steelwork, our design-first approach ensures every detail is fit for purpose and built to last.

Steel fabrication

We complete a wide variety of structural steel and custom fabrication projects each year in our Tairua workshop and on-site. Our work includes staircases, balustrades, gates, fencing, decks, and architectural detailing — alongside large-scale structural steel for residential and commercial builds.

Installation

Our installation crew bring precision and problem-solving to every site. From craning structural steel into place to welding connections and final alignment, we manage installation and crane hire end-to-end, ensuring every component fits perfectly and projects run safely, smoothly, and on schedule.

Structural steel, gates, trailers and crane hire.

Working with builders from the Whitianga Waterways to Morrinsville. Take a look at our services and projects.

Crane Hire

Custom Trailers 

Gates and fences 

Structural steel 

Opening Up a Waihi Beach Home with Structural Steel

Creating open-plan living often starts with removing walls. But before anything comes out, you need to make sure the structure above has somewhere else to go. That's exactly what this recentRead more

Structural Steel for a Large Architectural Home in Morrinsville

It's a 460sqm architectural home near Morrinsville, built by Jeremy Eulink from Bareacre Builders. He found us online and rang around for quotes. He wasn't after a supplier to chase up. He wanted anRead more

Structural Steel for a Hillside Build

Not every project starts with an easy site. Set above Tairua on the slopes of Paku, this build presented a combination of tight access, elevation, and coastal exposure - the kind of conditions whereRead more

Getting Structural Steel Right Before It Reaches Site

Before steel ever reaches site, the outcome is already decided. For this Coromandel build with Taylor Projects and Solutions, our focus was on fabricating the structural steel components that wouldRead more

Custom Waler Beams for Retaining Wall Reinforcement

When you’re reinforcing a retaining wall that’s supporting tonnes of earth pressure, off-the-shelf just won’t cut it. That’s why Alted Engineering was brought in to fabricate a set ofRead more

The Power of Good Drawings: How In-House Design Sets Alted Apart

At Alted Engineering, steel is only part of the story. Before any steel portal is lifted into place or a ridge beam is bolted down, there’s a crucial phase that shapes everything to come: theRead more

Landmark Homes New Show Home in Whitianga

A show home is more than just a display—it’s a statement of craftsmanship, quality, and attention to detail. At Alted Engineering, we’re proud to be part of the team bringing Landmark Homes’Read more

Structural Steel Installation Whitianga

Not a bad location for a beaut spring day! Our team have been working with PJ Builders to handle the installation of structural steel at a stunning Whitianga Waterways location. Working closely on-sRead more

Structural Steel for New Build: Percival Construction, Whitianga

Kicking into the New Year with a local project in Whitianga, with the crew at Percival Construction. This new build saw our team at Alted providing structural steel design, fabrication, andRead more

Ready to discuss your next structural steel project?

We’d love to help bring your design plans to life.

Licensed SOLIDWORKS practitioner

At Alted, design comes first. With over 20 years’ experience in CAD and CAE software, owner and engineer Bennet Gage-Brown leads our projects with SOLIDWORKS – the industry standard for precision engineering design.

From custom trailers to structural steel and architectural detailing, in-house design means every project is tailored, accurate, and ready to perform. By modelling in SOLIDWORKS before fabrication, we eliminate guesswork, streamline production, and deliver better results for our clients.