单词	trimming joist
释义	Trimming joist (Arch.) a joist into which timber trimmers are framed; a header. See Header.- Knight. See also: Trimming trimming joist trimming joist 1. A joist supporting one end of a header at the edge of an opening in a floor or roof frame, parallel to the other common joists. See also: Joist2. A joist supporting one end of a header at the edge of an opening in a floor or roof frame, parallel to the other common joists. trimming joist trimmer A joist, supporting a trimmer, of larger cross section but of the same length as, and parallel to, the common joists.
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