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.
