What is the difference between Girts and Purlins?

The difference between girts and purlins

is that "girts" is a horizontal structural member of post and beam architecture, typically attached to bridge two or more vertical members such as corner posts and "purlins" is a longitudinal structural member bridging two or more rafters of a roof.

girts

purlins

Noun

  • A horizontal structural member of post and beam architecture, typically attached to bridge two or more vertical members such as corner posts.

Related terms

  • girder

Exemple

  • There are various ways of tying rafters to sidewalls, and the choices may vary depending on roof pitch. One of the most common is the use of “birdsmouths" cut into the rafter. A notch is cut into the rafter so that the rafter bears down flat upon the doubled top plate of stick framing, or upon the girt in heavy timber framing.

Noun

  • A longitudinal structural member bridging two or more rafters of a roof.

Hyponyms

  • (longitudinal structural member of a roof): purlin plate, principal purlin, common purlin