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ridgeboard, ridgepole

A longitudinal member at the apex of a roof which supports the
References in periodicals archive ?
Nail a temporary second brace running at an angle from a cross tie to the ridgeboard near the first set of rafters.
This will level your ridgeboard, so you can fill in the remaining rafters one pair at a time.
The first step is to find where this ridgeboard will meet the roof.