After girders, arches are the second oldest bridge type and a classic structure. Unlike simple girder bridges, arches are well suited to the use of stone. Many ancient and well know examples of stone arches still stand to this day. Arches are good choices for crossing valleys and rivers since the arch doesn't require piers in the center. Arches can be one of the more beautiful bridge types.
1.Arch-a curved shape in the vertical plane that spans an opening
2.Arch-a masonry construction (usually curved) for spanning an opening and supporting the weight above it
Arches have been used in many places through out the world such places like Rome and there Aqueducts which was a long bridge that transported huge amounts of water to an aquifer in Rome.
The arch bridge works in a form called compression. It allows the load of the bridge to be evenly distributed. Jus as in the pictures.
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