The Tapered Box Beam is manufactured by folding two halves of steel plate and welding them together to form a box.
The box is tapered through its length, utilising only the amount of steel required, which reduces the weight/cost without affecting structural integrity. Using the Tapered Box Beam, spans range from 20m to 75m. An absence of knee and apex braces means more usable space within the building, and because the Tapered Box Beam is a sealed hollow section, it’s also bird-resistant, providing no surfaces for birds to roost when purlins are embedded.
The Tapered Box Beam has also been independently checked and verified by HERA (Heavy Engineering Research Association). HERA is recognised in both New Zealand and abroad as a leading authority in the design of steel structures.
Visit our brochures page to download the Tapered Box Beam booklet.
Similar to the purlins. We use Exactor “C” Sections for our wall girts. These are nested between the portal legs allowing for more width in the building. Our competitors would typically position girts on the outside of the portal frame, which reduces the useable space in the building.
The Tapered Box Beam system means we are not required to have a knee strut to support the rafter. Generally all other cold rolled structural systems will have a knee brace/strut, which supports the rafter sections. A knee brace limits the usable space in a building especially when moving vehicles and also reduces the ability for storage/racking. This image also shows a crane corbel.
Prevent birds landing and roosting in your building with bird-resistant purlins. The angled shape of the purlin makes it impossible for a bird to perch on. There are two types of purlins – closed cover purlins and BP purlins, as shown below.
The Tapered Box Beam is manufactured by folding two halves of steel plate and welding them together to form a sealed hollow box section. It is tapered through its length, utilising only the amount of steel required for a given design.
Similar to the knee brace, an apex brace comes across the top of the building. This is to pull the building together. Coresteel does not need to utilise these inferior braces due to higher structural integrity.
Our structural connections are fully bolted, giving the strongest connection. We do not support the use of brackets which have multiple TEK screws through them. Our competitors provide a welded or TEK screwed connection.
Instead of using a bottom girt 300mm above the ground, we can incorporate a vermin girt to sit on top of the slab and tie into the structure. The cladding on the exterior wall will come over the face of the vermin girt. With this unique profile the vermin are unable to enter the building in this region.
The Northland team were great to deal with. They were very approachable and always available to discuss things as they came up. Attention to detail was outstanding and the standard of finishing was very high. Any time we came up against an issue it was swiftly sorted with minimal fuss in a fair and open way. Would definitely recommend the team, their ability to provide a solution to our fairly specific building needs was awesome. Practical, stylish and affordable.
Luke Goodin, Kamo Vets Clinic
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Dealing with John and the team was a simple process from start to finish. Nothing was a problem throughout the build, even the changes on site that were made, were agreed upon and done straight away. The complete build process was project-managed extremely well and the schedule was followed - we were in and operating at the time we had agreed. I would have no hesitation in recommending Coresteel to anyone for their building project.
Matt Hird, Owner, Stihl Shop Te Awamutu
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From our first meeting John put me at ease with the entire project able to be under their control, leaving me to get on and run my business. I found the team on site were professional and nothing was any trouble. For me the process was seamless and I had full confidence in John and the team. The finished product is fantastic and I wouldn’t hesitate to use John and the team again.
Paul Saunders, Saunders Motor Group
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Taupo ITM worked closely with the Coresteel team during the construction of our new purpose-built site. We found Logan to be very professional and knowledgeable, ensuring the build was completed within the estimated timeframes. Logan’s knowledge of the building process was invaluable, being able to advise the best practice for positive outcomes. We could not be happier with the result and would happily recommend Logan and his team.
Warren Johnson, Director, Taupo ITM
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Coresteel offered us a cost-effective price, while maintaining a high standard of building products and an attractive, modern design. Overall the Coresteel service was easy and efficient and fulfilled every one of our expectations.
Carl Hansen, Owner, Stealth Properties, Whangarei
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Working with Logan and Lee from Coresteel has been a godsend. I have found a team that delivers across all aspects of a successful business relationship. Communication, efficiency, cost-effectiveness and quality are all traits that Logan and Lee live by and deliver.
Jamie Keehan, Mainfreight, Taupo
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As one of the directors of Pirtek Northland, I would like to take the opportunity to express my opinion of Coresteel's management and build process throughout our project. We found Coresteel to be extremely professional and they have constructed a fantastic building that suits our business requirements. I would highly recommend using Coresteel for any building project.
Peter Crene, Director, Pirtek Northland, Whangarei
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Our experience with Coresteel Buildings was outstanding. We felt right from the very first meeting that our dream of owning our own building was going to become a reality as Coresteel made it their priority. We look forward to coming here to work every day and it's thanks to Coresteel for making it happen.
