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principal rafter
noun
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
First recorded in 1655–65
Words nearby principal rafter
principal optic axis
,
principal parts
,
principal plane
,
principal point
,
principal quantum number
,
principal rafter
,
principal value
,
principalities
,
principality
,
principally
,
principate