Hammer-beam(redirected from Hammerbeam roof)
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|n.||1.||(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.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.