Innovative Steel
Frame Solutions

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Contact us today for a custom design and build, specific to your business requirements.

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At Coresteel, we're leaders in large-scale commercial and industrial steel frames

When you work with Coresteel, you know you’re dealing with experts in steel framing construction. Our systems, design technology, and quality materials mean we can provide superior steel buildings of virtually any size and shape.

We deliver steel frames all across New Zealand, from Northland to the bottom of the South Island. Get in touch today to discuss your next steel framing building project.

One-stop shop

Coresteel is your designer, engineer, manufacturer and builder all in one. Instead of dealing with multiple suppliers and conflicting timeframes, we will streamline the building process and make sure your steel frame project runs smoothly.

Design flexibility

Steel framing opens up a variety of design possibilities. Combined with our innovative portal systems, DonoBeam and the Bracketless Portal System, we can offer high spans and more design flexibility to cost-effectively create wide, open spaces.


Our steel frame buildings are synonymous with durability and strength. Constructed with New Zealand fabricated steel and engineered by experts, every steel building is designed to withstand harsh weather conditions and the rigours of day-to-day operations.

Like what you see?

Find your nearest franchise and get started on your new steel frame project.


A tapered box beam manufactured by welding two folded halves of steel plate together to form a box. The innovative DonoBeam design reduces the amount of steel needed, without impacting on structural integrity.

Cross section diagram of a building built using DonoBeam

Bracketless Portal System

Created in 2005 constructed using cold-formed flat Z450 galvanised coil, this patented system has been designed for efficiency and appeal.

Cross section diagram of a building built using Bracketless Portal System

Client testimonial

“Coresteel created a custom-built structure which delivered on price, quality and build time. We're looking forward to taking our business to the next level in a top-quality premises.”

Paul Christie, Owner, Ten4 Engineering, Whangarei

Ready to start your next project?