from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A short beam attached to the foot of a principal rafter in a roof, in place of a tie-beam.
Sorry, no etymologies found.