The first beam bridge was built in America
1212
beam girder
It was first built by the Romans about 50 AD and there have been several rebuilds since then, the last being in 1973.
the beam bridge and... i am not sure of the other one
A Cantilever bridge is built from iron, structural steel and prestressed and reinforced concrete. These materials make the trusses, box girders, vertical columns and the canitlever itself.
well the golden gate bridge is in fact yes it is a beam bridge, but it can also be aCantilever bridgesArch bridgTruss bridgeCable-stayed bridge
The different between suspension bridge and beam bridge are beam bridge are for short distance but suspension bridge for long distance. Beam bridge are used for highway passes and suspension bridge for wide waterway passes.
Danyang-Kunshan Grand Bridge is the longest beam bridge in the world and is approx 164.8 kilometres long.
beam and tunnel
An example of a beam bridge is Chesapeake Bay bridge-tunnel Site: http://www.pbs.org/wgbh/buildingbig/bridge/index.html
beam bridge
Well with a beam it allows the bridge to support the bridge