The Tapered Box Beam is a structural framing element fabricated from steel plate, and manufactured by folding two halves and welding them together to form a box.
The beam is tapered through its length, utilising only the amount of steel required for a given design. In comparison, our competitors’ version is parallel through its length and therefore utilises more steel than is structurally required in certain parts of the building.
The system was commercially released in 2014 following a joint venture between Donovan Group and New Zealand Steel (NZS) during which the Tapered Box Beam was developed for the New Zealand and Australian structural steel/universal beam (UB) markets.
Detailed market research was conducted into the size of the UB market and the possible use of an alternative product.
Currently, the UB market in New Zealand is 50,000 tonnes per annum and Donovan Group/NZS expect to get a reasonable market share with this product in the future.
As the Tapered Box Beam is a sealed hollow section, it’s bird and vermin resistant, providing no surface 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.