Principal rafter

One of several such wooden rafters that extend from the ridge uninterrupted down to the wall plate; more massive than common rafters, and framed into a tie beam that makes the whole assembly more stable.

principal rafter

In a timber-framed house, one of several such rafters that extend from the ridge of the roof down to the wall plate; somewhat heavier than a common rafter; often located at a corner post, story post, or chimney post and framed into a tie beam. Principal rafters, together with the principal purlins, form a roof framing system having considerable stability. Also called a blade.

单词	principal rafter
释义	Principal rafter Principal rafter One of several such wooden rafters that extend from the ridge uninterrupted down to the wall plate; more massive than common rafters, and framed into a tie beam that makes the whole assembly more stable. principal rafter In a timber-framed house, one of several such rafters that extend from the ridge of the roof down to the wall plate; somewhat heavier than a common rafter; often located at a corner post, story post, or chimney post and framed into a tie beam. Principal rafters, together with the principal purlins, form a roof framing system having considerable stability. Also called a blade.
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