principal rafter


noun
  1. a diagonal member of a roof principal, usually forming part of a truss and supporting the purlins on which the common rafters rest.

Origin of principal rafter

1
First recorded in 1655–65

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use principal rafter in a sentence

  • Two sketches are shown at the joining of the tie beam and the principal rafter.

    Woodwork Joints | William Fairham