purlins

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  11. [roofs and roof components]
  12. roof components
  13. roof frame components
  14. horizontal roof frame components
  15. purlins
Scope note
The horizontal timbers laid across the principal rafters and supporting the common rafters in a roof. Purlins differ from beams in roof construction in that purlins usually do not support any other members, instead supporting loads from the roof deck.
purlins
Accepted term: 10-Feb-2025