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 rib, constituting with that springing from the opposite hammer-beam an arch. Research Hammer-Beam
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Abbreviations
Research Hammer-Beam
