What architectural element extends an arch along its depth?

What architectural element extends an arch along its depth?

• A. Barrel vault
• B. Groin vault
• C. Dome
• D. Arch

Answer: (A)

Extending an arch along its depth produces a barrel vault. When you take the single curved arch and extrude it along a straight axis, you get a long, semicylindrical surface that spans space like a tunnel. This is the defining form of a barrel vault (also called a tunnel vault). A groin vault comes from the intersection of two barrel vaults at right angles, shaping a cross-shaped cross-section. A dome is a rounded, often hemispherical roof, while the arch itself is a curved element in one plane, not extended into depth. Barrels vaults are classic for covering long passageways and corridors with a continuous vaulted ceiling.

Extending an arch along its depth produces a barrel vault. When you take the single curved arch and extrude it along a straight axis, you get a long, semicylindrical surface that spans space like a tunnel. This is the defining form of a barrel vault (also called a tunnel vault). A groin vault comes from the intersection of two barrel vaults at right angles, shaping a cross-shaped cross-section. A dome is a rounded, often hemispherical roof, while the arch itself is a curved element in one plane, not extended into depth. Barrels vaults are classic for covering long passageways and corridors with a continuous vaulted ceiling.