Hammer-Beam

A hammer-beam is a short beam attached to the foot of a principal rafter in a roof, in the place of the tie-beam. Hammer-beams are used in pairs, and project from the wall, extending less than half-way across the apartments. The hammer-beam is generally supported by a rib rising up from a corbel below; and in its turn forms the support of another r
Found on http://www.probertencyclopaedia.com/browse/TH.HTM

Hammer-beam

Ham'mer-beam` (-bēm`) noun (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
Found on http://www.encyclo.co.uk/webster/H/10

Hammer-beam

• (n.) 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.
Found on http://thinkexist.com/dictionary/meaning/hammer-beam/
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