Hammer-beam
Pronunciation : Ham"mer-beam`
Part of Speech : n.
Definition : Defn: 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.
(Cothic Arch.)
Source : Webster's Unabridged Dictionary, 1913