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Fundamentals

Purlins

Purlins are secondary beams that are supported by the main load-resisting system of a roof structure. Purlins support the roof deck, which is usually screwed or welded to them. Purlins transfer the roof loads (in the form of point loads) from the decking to the main structure.

Purlins on Trusses

 

Purlins on a Spatial Structure

 

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