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.

Word History and Origins

Origin of principal rafter¹

First recorded in 1655–65

Example Sentences

The Modillions represent the ends of the Sheers, and the Dentels represent the ends of the principal Rafter.

From Project Gutenberg

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

From Project Gutenberg

A, B, tie beam; C, C, queen posts; D, straining piece; E, principal rafter; F, rafter.

From Project Gutenberg