barrel vault

A masonry vault resting on two parallel walls and having the form of a half cylinder; sometimes called tunnel vault; also, by extension, a nonstructural wooden ceiling of the same form. Photo from Dumbo, Brooklyn, New York, 2017. (Roth, 1979, 1980)

Photo from Fort McHenry, Baltimore, Maryland, 2024.
barrel roof, cradle vault, tunnel vault, wagonhead vault, wagon vault
