The beam bridge is the simplest type of bridge. It is made up of a long horizontal beam of wood, metal, or concrete that is supported by piers. About 1/2 of all bridges in the U.S. are beam bridges.
Pros:
Beam bridges are the easiest type of bridge to build, and they are the least expensive.
Cons:
Beam bridges can only span about 250 feet, and they do not allow for large ships to pass under them.
Beam bridges are the easiest type of bridge to build, and they are the least expensive.
Cons:
Beam bridges can only span about 250 feet, and they do not allow for large ships to pass under them.