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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Ham·mer-beam n. Gothic Arch. A member of one description of roof truss, called hammer-beam truss, which is so framed as not to have a tiebeam at the top of the wall. Each principal has two hammer-beams, which occupy the situation, and to some extent serve the purpose, of a tiebeam.
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