common purlin
common purlin
In
timber-framed construction, one of a number of horizontal timbers that are parallel to the ridge of the roof, and joined to the
principal rafters into which they are seated. The upper surfaces of the common purlins and the principal rafters are in the same plane. Also see
purlin.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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