Archit. a vault shaped like half a cylinder
A simple continuous vault, typically semicircular in cross section. Also called tunnel vault, wagon vault.
barrel vault ceiling,
(plural barrel vaults)
- (architecture) A simple roof having a curved, often semicircular cross section; used to span large distances in railway stations, churches, etc. Usually supported on columns.
- (roofing) A building profile featuring a rounded profile to the roof on the short axis, but with no angle change on a cut along the long axis.