Our unique, patented Bracketless Portal System is constructed using cold-formed flat Z450 galvanised coil.
Typical clear spans range from 9m to 30m, with no obtrusive knee or apex braces.
Primary and secondary sections are fully-bolted (not TEK screwed), and nested purlins are bird/vermin-resistant.
The Bracketless Portal System is an exclusive patented design, created by Coresteel Buildings in 2005.
The system allows steel columns and rafters to be nested together and directly bolted, rather than being joined with a bracket. This system produces a stronger connection without the need for additional obtrusive knee-bracing.
Our system supports buildings of virtually any size and allows you to make the most of your internal space.
This is our strongest connection to the ground which is basically a C section cast into the foundation with uplift tabs. The portal frame slips over the splice plate like a collar and is then fully bolted. We can use a pin connection with Chemsets but would have to increase the gauge of steel to suit.
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.
With our Bracketless Portal System strength properties, 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.
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.
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.
The Bracketless Portal System offers a more cost-effective option to hot formed steel or wooden products for nearly every build, allowing sections to be simply bolted together, drastically reducing construction time and allowing for buildings of virtually any size, without compromising the structural integrity of the building. This exclusive system is similar to that which has been used extensively in the industrial market over a number of years, however redesigned for simplicity, efficiency and appeal. The system also ensures better use of raw materials and improved manufacturing and erection time, saving time and money.
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.
