How Coresteel is Revolutionising the Steel Frame Industry

It’s no secret that the construction industry tends to change slowly. Unlike other industries which are undergoing a lot of change in response to major developments in technology, like home automation, construction materials and techniques are relatively tried and true, so there’s less of a push to change them.

Many people in the industry subscribe to the idea that if “it isn’t broke, don’t fix it”, which can have its place, but can also limit possibilities for improvement.

Here at Coresteel, we’re focused on producing new cost-effective systems without compromising the structural integrity of buildings. Since 2005, we’ve earned our reputation as one of NZ’s largest and most trusted commercial construction companies by developing two unique building systems: the patent DonoBeam and Bracketless Portal System. Learn more about them below.


The impressive DonoBeam works at different levels depending on how hard a structural member is working to support a building. In contrast to usual systems which use uniform width beams, the DonoBeam uses narrower beams where structural members are under less pressure. This allows a building to use less steel, delivering cost savings, and reducing the carbon footprint caused by steel production and manufacturing.

The DonoBeam is manufactured by folding two halves of a steel plate and welding them together to form a box. This box is tapered through its length, utilising only the amount of steel required, also reducing the weight and cost without affecting structural integrity. An absence of knee and apex braces means more usable space within the building, and because the DonoBeam is a sealed hollow section, it’s also bird-resistant, providing no surfaces for birds to roost when purlins are embedded.


Bracketless Portal System

The patented Bracketless Portal System was introduced by Coresteel in 2005, the first of its kind in steel building construction. This unique system offers flexibility to custom design the interior space of a building. It incorporates a structure manufactured from cold-formed flat Z450 galvanised coil. Steel columns, rafters, purlins and girts, are customised, and prefabricated in Coresteel’s manufacturing facility, then delivered with all the required fastenings to a construction site as a kit set.

As the building goes up, steel columns and rafters are nested together and directly bolted, rather than using intrusive knee braces and apex brackets, saving time and labour costs. The Bracketless Portal System creates more useable storage space in buildings by removing brackets, allowing a warehouse or factory to stack materials and pallets higher to get more usable space. Another unique feature of this system is increased bird and vermin resistance achieved via nested purlins and a vermin girt.


New Zealand Made

Coresteel is 100% Kiwi-owned and operated, using steel made in New Zealand. The company designs, engineers, manufactures, and erects the entire structure, meaning Coresteel is in full control of the whole product creation from concept to completion.

Because all our franchisees are local Kiwis and are located all around the country, they have a wealth of building for NZ conditions. Our experts are often able to offer advice relevant to the local area, no matter where in the country your project is.

Using local steel also reduces the carbon footprint left by diesel engine cargo ships, not to mention buying and using local New Zealand-made steel also supports the national economy, providing more employment for Kiwis.


Why Coresteel?

We are all about making your life easier and with 25 locally-owned franchises throughout New Zealand, we’ve got you covered. Our buildings are New Zealand designed, manufactured, and constructed to the highest engineering standards. When you choose Coresteel Buildings you can be confident you are receiving the best quality product. Want to take your build project to the next level? Talk to a Coresteel design and build consultant today.

Ready to start your next project?