purlin(redirected from purline)
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pur·linalso pur·line (pûr′lĭn)
One of several horizontal timbers supporting the rafters of a roof.
(Building) a horizontal beam that provides intermediate support for the common rafters of a roof construction
[C15: of uncertain origin]
a longitudinal member in a roof frame, usu. for supporting rafters or the like between the plate and the ridge.
[1400–50; late Middle English purlyn, purloyne]