What is the Latin word for cross-beam?

The usual Latin words for “cross-beam” are trānstrum, trānstillum. The right choice depends on the sense; see the distinctions below.

English → Latin

“cross-beam” in Latin

trānstrumcrossbeam, transom; thwart of a vessel trānstilluma little crossbeam

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

cross-beam

tigrmm transversum or transversarium; transtrum (Vitrvius; derived from θράνος, diminutive θράνιστρον: sc. lignum): a small cross-beam, transtilla: to join by a cross-beam, aliquid materia jugamentare (Vitrvius, 2, 1, 3, ed. Schneider).

Quick answer

What is the Latin word for cross-beam?: The usual Latin words for “cross-beam” are trānstrum, trānstillum. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.