• Webster's Revised Unabridged Dictionary
    • n Purlin (Arch) In root construction, a horizontal member supported on the principals and supporting the common rafters.
    • ***
Century Dictionary and Cyclopedia
    • n purlin In carpentry, a piece of timber laid horizontally upon the principal rafters of a roof to support the common rafters on which the covering is laid. Also called side timber or side waver. See cut under roof.
    • ***
Chambers's Twentieth Century Dictionary
    • n Purlin pur′lin a piece of timber stretching horizontally across the rafters underneath to support them in the middle.
    • ***


Webster's Revised Unabridged Dictionary
Etymol. uncertain
Chambers's Twentieth Century Dictionary
Perh. Fr. pour, for, or par, through, ligne, a line.


In literature:

To it the purlins of the roof could be fastened.
"Inca Land" by Hiram Bingham
It is proposed to employ for its covering wooden purlins and tin plates.
"Scientific American Supplement, No. 586, March 26, 1887" by Various
Purlin roof 188 286.
"Carpentry for Boys" by J. S. Zerbe
The purlins and collar can be made and fitted after the roof is raised.
"Shelters, Shacks and Shanties" by D.C. Beard

In news:

Metl-Span LLC, based in Lewisville, TX, has introduced CFR Retro- Seam ™, an insulated metal standing seam roof panel that features the innovative Roof Hugger® sub-purlin system.