Expand the possibilities of your building with DonoBeam.
DonoBeam is a tapered box beam manufactured by welding two folded halves of steel plate together to form a box. It’s specifically tapered to reduce the amount of steel needed for any given design, without reducing structural integrity.
Codeveloped in 2015 with BlueScope Steel, DonoBeam has been designed to withstand harsh New Zealand environmental conditions to ensure your new building is protected for years to come. The steel-saving design offers a more robust design solution (compared to cold-formed sections) for medium to large spanning buildings, and a solution that is lighter than hot-rolled sections. The result is a trusted product that is rapidly becoming the most efficient structural solution in the New Zealand market.
Alongside the significant cost-savings in steel, DonoBeam delivers high spans and greater design flexibility. We understand the value in unobstructed internal space, and DonoBeam structural steel beams can deliver this economically, with clear spans out to 75m or even larger when propped. This versatile system can also incorporate a range of architectural or practical elements that your business needs – all with a unique and distinct architectural aesthetic to make your project stand out from the competition.
As the structure is prefabricated, the entire frame can be assembled safely and quickly on the ground without the need for welding on site. This equates to less risk and time spent on-site, resulting in significant labour cost savings for you and your business.
Structural Points of Difference
DonoBeam's torsional stiffness significantly reduces the need for fly bracing
Traditional I-Beam portal frames tend to buckle rotationally under load and lose their strength. To compensate for this, they require a lot of buckling restraints (fly-bracing) to be installed. DonoBeam is significantly more stiffer rotationally, and can carry high loads with minimal buckling restraint. As a result, DonoBeam buildings also look cleaner and more appealing without the cluttered look of fly-bracing.
Reduction in steel weight due to tapering of portal structure
DonoBeam frames are designed to be efficient, providing structural strength where it is required and removing material where it’s not. This reduces the overall weight of the structure and makes better use of Earth’s valuable resources.
Fully bolted for easy erection
Our structural connections are fully bolted and structural members appropriately sized for easy handling, transport and erection.
Easily partners with DonoBrace® - Donovan Group's tension-only bracing system
DonoBrace is the only steel rod bracing product in Australia and New Zealand which is dynamically tested in a simulated earthquake environment.
Bird and vermin-resistant sections
DonoBeam frames are fully sealed box sections making them resistant to birds, vermin, and dust. They can be paired with “bird-proof” purlins to create a complete solution for building owners.
Fully-welded tapered section
DonoBeam 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.