Roof purlins: what they do and how the covering affects the choice
Selecting roof purlins begins with establishing their role in the specific structural system, not with choosing a profile of a given height. The building owner and the contractor should jointly check whether a purlin supports the rafters in a timber roof structure or runs between the frames of a steel hall and carries the roof covering. It is essential to match the spacing to the loads and to the capabilities of the sheet or sandwich panel, and to provide bracing and connections in accordance with the design. The cross-section geometry alone does not guarantee load-bearing capacity.









