Single span Rigid-frame bridge

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single span rigid-frame bridges typically made of reinforced concrete , commonly used on parkways , other roadways. design efficient use of material cross section @ mid-span relatively narrow , amount of concrete needed @ abutments reduced. narrow section @ mid-span gives bridge profile slight arch shape making design particularly useful when large headroom required. profile makes bridge more architecturally pleasing beam bridge. rigid-frame design may efficient bridge type spans between 35 , 80 feet. if steel used, economic advantage extends spans of 120 feet.








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