Swing Bridge

A swing bridge is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its centre of gravity, about which the turning span can then pivot horizontally as shown in the animated illustration to the right. Small swing bridges as found over canals may be pivoted only at one end, opening as would a gate, but require substantial underground structure to support the pivot.

In its closed position, a swing bridge carrying a road or railway over a river or canal, for example, allows traffic to cross. When a water vessel needs to pass the bridge, road traffic is stopped (usually by traffic signals and barriers), and then motors rotate the bridge approximately 90 degrees horizontally about its pivot point.

Read more about Swing BridgeAdvantages, Disadvantages

Other articles related to "swing bridge, bridge, bridges":

St. Joseph Swing Bridge
... Joseph Swing Bridge (also known as the St ... Joseph Union Pacific Bridge and the St ... Joseph-Elwood Bridge) is a Union Pacific Railroad truss Swing bridge connecting St ...
Wilmington Rail Viaduct - Physical Description
... which are steel plate through girder or deck girder bridges ... The bridge over the Brandywine Creek near the east end of the viaduct had to be replaced to accommodate the newly elevated track level ... though rarely used, and the railroad had to construct a moveable bridge to accommodate navigation ...
Locke Avenue Bridge - History and Description
... The Locke Avenue Bridge was eligible for inclusion in the National Record of Historic Places ... A Historic Bridge Alternatives Analysis dated June 1995 was prepared by Bettigole Andrews and Clark, Inc ... and recommended to replace the swing bridge with a fixed bridge ...
Swing Bridge, River Tyne
... The Swing Bridge is a swing bridge over the River Tyne, England connecting Newcastle upon Tyne and Gateshead, and lies between the Tyne Bridge and the High Level ... The hydraulic power still used to move the bridge is today derived from electrically driven pumps ... sunk into a 60 feet (18 m) shaft below the bridge the water is then released under pressure which runs the machinery to turn the bridge ...
Snakeholme Lock - History
... A swing bridge reached over the bottom of the lock to allow the Yorkshire Keels to get through without lowering the mast ... At some point the swing bridge was replaced with a fixed structure ... When the lock was drained, the original swing bridge turntable casting was found in the mud and saved for historical interest ...

Famous quotes containing the words bridge and/or swing:

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    Neither moral relations nor the moral law can swing in vacuo. Their only habitat can be a mind which feels them; and no world composed of merely physical facts can possibly be a world to which ethical propositions apply.
    William James (1842–1910)