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Bridges. By:Brian Demers, Shane Reeger, Stephen Murphy. Historical facts. Primitive humans have used even fallen trees as bridges to cross rivers and streams Forest tendrils can be intertwined to create a natural version of a suspension bridge. Historical facts continued.
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Bridges By:Brian Demers, Shane Reeger, Stephen Murphy
Historical facts • Primitive humans have used even fallen trees as bridges to cross rivers and streams • Forest tendrils can be intertwined to create a natural version of a suspension bridge
Historical facts continued • Some bridges were even made out of rocks animal hides and logs • Without bridges crossing rivers would be near impossible
Historical facts continued • In the first and second century the romans have had made bridges as part of their culture • Romans have built many of their bridges over ravines one of the surviving examples was built for trajon in ad 105
Historical facts continued • Another example of roman bridges, the Sant, Angelo bridge was built in AD 134 to make an aproach to the mausoleum for Hadrien, now known as the Castel Sant, Angelo
Historical facts continued • There were a good number of inhabited bridges built in the 17th century • Inhabited bridges were built around houses
Historical facts continued • The construction for the London bridge began in 1176 and was completed 1209 possibly one of the most famous if not the most famous bridge in history
Historical facts on bridges • In 1779 the english had learned how to use iron cast for bridges
Historical facts continued • The first iron bridge was made in 1779 • With one span equal up to 100 ft!
GOLDEN GATE BRIDGE A SUSPENSION BRIDGE THAT CONNECTS MARIN COUNTY TO SAN FRANSISCO www.cif.org
LONDON BRIDGE www.frees-style.net • WAS A BRIDGE IN LONDON BUT IS NOW IN THE U.S.
BRIDGE TYPES • GIRDER • TRUSS • RIGED FRAME • ARCH • SUSPENSION • CABLE STAYED
Girder Bridge http://www.matsuo-bridge.co.jp/english/bridges/index.shtm
RIGID FRAME http://www.matsuo-bridge.co.jp/english/bridges/index.shtm