plural of straining beam

A tree (Sorbus aria, formerly Pyrus aria) related to the apple.

(carpentry) The top longitudinal beam of a ridged roof where the top ends of the rafters meet.

plural of hammer beam

(architecture) A member of a kind of roof truss (a hammer-beam truss), 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.

plural of beam engine

A kind of steam engine where a pivoted overhead beam is used to apply the force from a vertical piston to a vertical connecting rod.

plural of shoe beam

Alternative form of shoebeam

(architecture) A beam whose underside has a concave curve upward.