In architecture, a transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. This contrasts with a mullion, a vertical structural member. [1]

Nov 18, 2025 · Transom windows sit over a door or other window on top of a horizontal beam, called a transom. They can be decorative or functional and have been popular since the 14th century.

: a window above a door or other window built on and commonly hinged to a transom

Dec 17, 2024 · In the world of construction, the term transom refers to a horizontal structural element found in doors, windows, or other openings. A transom is typically positioned above the main door or …

Jul 28, 2025 · In this guide, you’ll learn exactly what a transom window is, its historical roots, types and design options, benefits, considerations, and FAQ's.

1 day ago · LOS ANGELES, Jan. 22, 2026 (GLOBE NEWSWIRE) — Transom Capital Group (“Transom”), a Los Angeles–based private equity firm specializing in operational transformation, …

Jan 14, 2026 · Noun transom (plural transoms) (architecture) A crosspiece over a door; a lintel. (architecture) A horizontal glazing bar in a window. A transom window. (nautical) Any of several …