HST Steel Purlins are a practical, high-strength structural solution for commercial and residential building projects. Roll-formed from high-tensil...
View full detailsSteel purlins are the horizontal beams that run across your roof frame, sitting between the main rafters and supporting your roofing iron, cladding, and insulation. They're a core part of almost every steel-framed building in New Zealand - from farm sheds and warehouses to factories and prefabricated structures.
Timber was once the go-to material for purlins, but steel has largely replaced it - and for good reason. Steel purlins resist rot, termites, and fire, and they hold their shape over time without warping or shrinking. That means fewer call-backs, less maintenance, and a longer-lasting structure overall.
One of the biggest advantages of steel purlins is the strength-to-weight ratio. They carry significant roof loads without adding unnecessary weight to the overall structure. This reduces stress on columns and foundations, which can lower material costs across the whole build.
Steel purlins are precision-manufactured to consistent dimensions, so they arrive on site ready to install. No cutting, no shaping - just straightforward fixing to your rafters or wall frames. For large-span buildings, this translates directly into faster build times and lower labour costs.
Galvanised steel purlins are well-suited to the New Zealand climate, offering strong resistance to moisture and corrosion. When properly spaced they provide a stable, even base for your roofing sheets and wall cladding.
Steel purlins work across roof support frames, wall cladding systems, and even as primary structural members in smaller buildings. Whether you're building a new shed or extending an existing structure, purlins are a reliable, cost-effective solution.
