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The round arch and barrel valult are similar in shape. The barrel vault is an extension of the round arches which form the vault or roof of a structure.
vault.
curve, dome, span, vault
Tacoma narrow bridge.
line of flight, or you can also call it a parabolic arc.
simple, you go get a computer and type in the question i am answering right now.Dumbass
VAULT
barrel vault
barrel vault
They were concrete, the barrel arch and the vault.
vault
An extended arch is called a vault. Most tunnel are built using vaults. It's a bunch of arches put together.