purline
Horizontal roof timber
A purline (also spelled purlin) is a horizontal beam in a roof structure, running parallel to the ridge and supporting the rafters or roof decking.
Purlines transfer the roof's weight to the main structural supports.
The old barn's purlines had rotted through and needed replacing.
structure
Sloped roof support
- roofBuilding's protective top
- timberWood for construction
- beamStructural support member
- horizontalParallel to the horizon
support · framing · truss · joist · ridge · eave · gable · span
material
Tree-derived building material
- steelCarbon-hardened iron alloy
- lumberSawn wood for building
- metalHard conductive solid
- timberWood for construction
galvanized · aluminum · engineered · laminated · solid · treated · composite · structural