- Swing bridge
A swing bridge is a
movable bridgethat has as its primary structural support a vertical locating pin and support ring at or near to its center, about which the turning span can then pivot horizontally as shown in the animated illustration below. 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 over a
riveror canal, for example, allows road 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.
*As this type requires no counterweights the complete weight is significantly reduced as compared to other moveable bridges.
*Where sufficient channel is available to have individual traffic directions on each side the likelihood of vessel-to-vessel collisions is reduced.
*The central support is often mounted upon a berm along the axis of the watercourse, intended to protect the bridge from watercraft collisions when it is opened. This artificial island forms an excellent construction area for building the movable span as the construction will not impede channel traffic.
Government Bridgeacross the Mississippi has a swing section for river traffic traversing Lock and Dam 15.]
* For a symmetrical bridge the central pier forms a hazard to navigation. Asymmetrical bridges may place the pivot near one side of the channel.
* Where a wide channel is not available a large portion of the bridge may be over an area that would be easily spanned by other means.
* A wide channel will be reduced by the center pivot and foundation.
* When open, the bridge will have to maintain its own weight as a balanced double
cantilever, while when closed and in use for traffic the live loads will be distributed as in a pair of conventional trussbridges, which may require additional stiffness in some members whose loading will be alternately in compression or tension.
* If struck from the water near the edge of the span, it may rotate enough to cause safety problems (cf.
Big Bayou Canot train disaster).
Puente de la Mujer, an asymmetrical cable-stayed span.
Pyrmont Bridge, Sydney, Australia. (opened 1902. Closed to traffic, 1988. Still in use as pedestrian and monorail bridge.)
Glebe Island Bridge, Sydney, Australia. (Opened 1901. Closed to traffic, 1995; supplanted by Anzac Bridge. Still in existence.)
*Victoria Bridge,Townsville, Queensland, Australia.(Opened 1914 est. still in use as a foot bridge.)
Sale Swing Bridge, Sale, Victoria, Australia. (Opened 1883. Closed to traffic in 2002. Restored to full working order in 2006.)
* Dunalley Bridge,
Dunalley, TasmaniaStill in use.
Belize CitySwing Bridge, Belize City (oldest such bridge in Central America, restored in 2000's)
* The longest swing bridge span is 340 metres, by the
El Ferdan Railway Bridgeacross the Suez Canal.
* Le pont tournant rue Dieu, across the
Canal Saint-Martinin Paris, is a distinctive location in the 1938 film " Hôtel du Nord", and is featured in the opening shot of the film.
Kaiser-Wilhelm-Brückein Wilhelmshaven, built in 1907, with the length of 159m, it was once Europe's biggest swing bridge
Delft, close the Technische Universiteit Delft, is a bridge of this type. coord|52|0|5.71|N|4|21|50.10|E
Garden Reach Road Swing Bridge, For Calcutta Port, Kidderpore, Kolkata
Poira -Corjuem Bridge,for GSIDC,Corjuem,Goa by Rajdeep Buildcon Pvt. Ltd.
Seán O'Casey Bridge, Dublin, Ireland
Michael Davitt Bridge, Co. Mayo, Ireland
* Portumna Bridge,
Portumna, Co. Galway, Ireland
Ponte Girevole, Taranto
Kalpaka Tilts, Liepāja, connecting the city with the former Russian/Soviet port Karosta. The bridge is temporary not operating after a ship rammed part of the construction.
Kopu Bridge, Waihou River, near Thames, New Zealand
* Boothferry swing bridge at
Boothferry, Yorkshire (see article for image)
Connaught Crossingin London Docklands, built as a low-rising swing bridge to allow marine traffic in the Royal Docksto pass at a place when the proximity of London City Airportmeant a higher fixed bridge was not practicable.
Manchester Ship Canalat Latchford, Stockton Heathand Lower Waltonin Warrington, and also slightly further west at Moore. Near the eastern end of the canal in Salford, the Barton swing bridge is adjacent to the Barton Swing Aqueduct- a 234-foot, 800-tonne trough holding some 800 tonnes of water (retained by gates at either end) swings so that it is at right angles to the Bridgewater Canalto allow ships to pass up the Ship Canal.
Samuel Beckett Bridge, Dublin, Ireland(under construction)
Swing Bridge, River Tyneat Newcastle Upon Tyne. The Tyne swing bridge has an 85.7 metre cantilevered span with a central axis of rotation able to move through 90° to allow vessels to pass on either side of it.
Trowse Bridgeat Norwich. Carries the electrified Great Eastern Main Lineover the River Yare. It is the only overhead electrified swing bridge in the country.
Barmouth Bridge- rail
Beccles swing bridge- rail
* Bethells Swing Bridge
Goole swing bridge- rail
* Hawarden Railway Bridge - rail ( [http://www.bbc.co.uk/wales/northeast/sites/deeside/pages/photos1.shtml?3 now deactivated] ).
Leeds and Liverpool CanalHas a large number of swing bridges, especially between Bingleyand Skiptonand Burscough and Liverpool. Many are manually operated, carrying only farm tracks, but a significant number carry road traffic and are mechanised for boater operation.
Kennet and Avon Canalat Sulhamstead, Berkshire
Oulton Broad swing bridge- rail
Reedham swing bridge- rail
Selby swing bridge- rail
Somerleyton swing bridge
Sutton Bridge swing bridge
Caernarfon swing bridge
Bridgeport Swing Bridge, Bridgeport, Alabama(demolished in late 1970s, replaced with new span)
* Bridge No. 1397, Route 156 over the
Niantic River, East Lyme, Connecticut- Waterford, Connecticut(1921 steel swing bridge)
* Bridge No. 4455, Central Avenue over Lewis Gut,
Bridgeport, Connecticut(1924 steel swing bridge)
* Burlington Northern Santa Fe Railroad Bridge crossing the Columbia River,
** [http://maps.google.com/maps?ll=45.626599,-122.687781&spn=0.002724,0.009152&t=k Google Maps image]
Center Street Bridge, Cleveland, Ohio(1901)
** [http://maps.google.com/maps?f=q&hl=en&geocode=&q=41.494300,-81.703500&ie=UTF8&t=k&ll=41.495000,-81.704700&spn=0.000100,0.000100&z=19 Google Maps image]
Chef Menteur Bridge, near Slidell, Louisiana
Chincoteague ChannelSwing Bridge, Chincoteague, Virginia
* Curtis Creek Rail Bridge,
** [http://maps.google.com/maps?hl=en&q=&ie=UTF8&t=h&om=1&z=18&ll=39.201078,-76.576091&spn=0.00274,0.003932 Google Maps image]
East Haddam Bridge, Route 82 over the Connecticut River, East Haddam, Connecticut(1913)
Fort Madison Toll Bridge, crosses Mississippi Riverand connects the Fort Madison, Iowawith Niota, Illinois.
Fort Pike Bridge, near Slidell, Louisianaand New Orleans, Louisiana
Frederick Douglass Memorial Bridge, Washington, DC
Figure Eight Island Bridge, North of Wilmington, North Carolina
Government Bridgeon the Mississippi Riverbetween Davenport, Iowaand Rock Island, Illinois(1896)
Grand Haven GTW RR Swing BridgeConnecting Grand Haven & Ferrysburg, MI
Grosse Ile Toll Bridgeand nearby Wayne County Bridge, Grosse Ile, Michigan
I Street Bridge, Sacramento, California
Livingston Avenue Bridge, Albany, New York
* Middle Branch of
Patapsco RiverRail Bridge, near Camden Yards, Baltimore, Maryland
** [http://maps.google.com/maps?hl=en&q=&ie=UTF8&z=17&ll=39.265313,-76.62406&spn=0.005474,0.007864&t=h&om=1 Google Maps image]
Mathers Bridge, Connecting Merritt Island, Floridato Indian Harbour Beach, Floridaacross the Banana River
New Richmond Swing Bridge, near Fennville, Michigan
Norfolk Southern Railway(former Conrail) Bridge crossing the Maumee River, Toledo, Ohio
** [http://maps.google.com/maps?t=k&ie=UTF8&z=18&ll=41.6322,-83.531209&spn=0.001371,0.002376&om=0 Google Maps image]
** [http://www.railpictures.net/viewphoto.php?id=161541 RailPictures.Net Photo]
* The 2,800 ft
Norfolk Southern RailwayBridge crossing the Ocmulgee Riverin Lumber City, Georgiabuilt 1916. "Note- Electrical Swing Components Removed"
** [http://maps.google.com/maps?q=31.930033,-82.683723&ie=UTF8&ll=31.919794,-82.674823&spn=0.003961,0.00677&t=k&z=17 Google Maps Image]
North Fork New River Bridge, Fort Lauderdale, Florida
Northern Avenue Bridgeover Fort Point Channelin Boston, Massachusetts(1908 steel truss)
Omaha Road Bridge Number 15, an asymmetrical single track railroad bridge over the Mississippi Riverbetween Saint Paul, Minnesotaand Lilydale, Minnesota(1916)
Pennsylvania Railroad's Shellpot Branchover Christina Riverin Wilmington, Delaware(original two-track bridge replaced with a single track bridge in 2003)
Pennsylvania Railroad's South Philadelphia Branch over Schuylkill River
Providence & Worcester railroad bridge, Middletown, Connecticut
Riverside-Delanco Bridgeover Rancocas Creekin New Jersey
Saugatuck River Bridge(Bridge No. 1349), Route 136 over the Saugatuck River, Westport, Connecticut(1884 iron-truss swing bridge)
Spokane Street Bridgeover the Duwamish Waterwayin Seattle, Washington(1991 reinforced concrete double swing span)
St. Joseph Swing Bridgeover the St. Joseph River, St. Joseph, Michigan(1904)
** [http://railroadfan.com/gallery/displayimage.php?pos=-33509 Railroadfan.com Photo]
Surf City Bridge Surf City, NC
Union Pacific Railroad(former CNW) Bridge crossing the Mississippi River, Clinton, Iowa
** [http://www.railpictures.net/viewphoto.php?id=155001 RailPictures.net Photo (1 of 2)]
** [http://www.railpictures.net/viewphoto.php?id=154999 RailPictures.net Photo (2 of 2)]
Woods Memorial Bridgeover the Beaufort River in Beaufort, SC
** [http://maps.google.com/maps?f=q&hl=en&geocode=&q=beaufort,+sc&ie=UTF8&ll=32.428106,-80.668724&spn=0.003939,0.00677&t=k&z=17 Google Maps Image]
* Seven bridges over the
Harlem Riverin New York City, including from south to north:
Willis Avenue Bridge
** Third Avenue Bridge
Madison Avenue Bridge
145th Street Bridge
Macombs Dam Bridge
University Heights Bridge
Spuyten Duyvil Bridge
Movable bridgefor a list of other movable bridge types
* [http://www.youtube.com/watch?v=GrspAPjQZmk Video of manually operated railroad swing bridge over the Lewes & Rehoboth Canal, Lewes, Delaware, 2008]
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