Swing bridge

Last updated

Swing bridge
MovableBridge swing.gif
Ancestor Truss bridge, cantilever bridge
RelatedOther moving types: Bascule bridge, drawbridge, jetway, vertical-lift bridge, tilt bridge
DescendantGate-swing bridge – see Puente de la Mujer
CarriesAutomobile, truck, light rail, heavy rail
Span rangeShort
MaterialSteel
MovableYes
Design effortMedium
Falsework requiredNo

A swing bridge (or swing span bridge) is a movable bridge that can be rotated horizontally around a vertical axis. It has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot horizontally as shown in the animated illustration to the right.

Contents

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 horizontally about its pivot point. The typical swing bridge will rotate approximately 90 degrees, or one-quarter turn; however, a bridge which intersects the navigation channel at an oblique angle may be built to rotate only 45 degrees, or one-eighth turn, in order to clear the channel. Small swing bridges as found over narrow canals may be pivoted only at one end, opening as would a gate, but require substantial underground structure to support the pivot.

Advantages

I Street swing Bridge span turned to allow a boat to pass Sacramento California I Street Bridge Sacramento.jpg
I Street swing Bridge span turned to allow a boat to pass Sacramento California
BNSF Railroad Bridge 9.6 across the Columbia River in Portland, Oregon, showing the swing-span section turning. BNSF Bridge 9.6 swing span turned.jpg
BNSF Railroad Bridge 9.6 across the Columbia River in Portland, Oregon, showing the swing-span section turning.

Disadvantages

An example of how small swing bridges like this one may be pivoted only at one end, but that does require substantial underground structure to support the pivot. Victoria & Alfred Waterfront, Cape Town. Swing Bridge and ferry in motion.jpg
An example of how small swing bridges like this one may be pivoted only at one end, but that does require substantial underground structure to support the pivot. Victoria & Alfred Waterfront, Cape Town.

Examples

Government Bridge across the Mississippi has a swing section for river traffic traversing Lock and Dam 15 Govt bridge anim2.gif
Government Bridge across the Mississippi has a swing section for river traffic traversing Lock and Dam 15

Albania

Argentina

Australia

Belize

Canada

Bridge NameWaterwayCo-ordinatesStatusComments
Cambie Street Bridge Connaught Bridge False Creek, Vancouver, British Columbia 49°16′19″N123°6′54″W / 49.27194°N 123.11500°W / 49.27194; -123.11500 (Cambie Street Bridge) Demolished/replaced (1985), formerly vehicle, pedestrian & streetcar trafficShort documentary "Swingspan" tells the history of the bridge and its demolition.
Canso Canal Bridge Canso Canal, Nova Scotia 45°38′50″N61°24′45″W / 45.64722°N 61.41250°W / 45.64722; -61.41250 (Canso Swing Bridge) Still swings, Vehicle/Rail TrafficLinks Nova Scotia mainland with Cape Breton Island with 2 traffic lanes of Highway 104 (the Trans-Canada Highway) as well as a single track railway line operated by the Cape Breton and Central Nova Scotia Railway (CBNS).
CNR Bridge Fraser River, British Columbia 49°11′50″N122°55′24″W / 49.19722°N 122.92333°W / 49.19722; -122.92333 (CNR Bridge) Still swings, Rail TrafficBetween Queensborough in New Westminster, British Columbia and the mainland
Derwent Way Bridge Fraser River, British Columbia 49°11′09″N122°55′55″W / 49.18583°N 122.93194°W / 49.18583; -122.93194 (Derwent Way Bridge) Still swings, Vehicle/Rail TrafficBetween Queensborough in New Westminster, British Columbia and Annacis Island in Delta, British Columbia
Fredericton Railway Bridge Fredericton, New Brunswick 45°57′25″N66°37′43″W / 45.95694°N 66.62861°W / 45.95694; -66.62861 (Fredericton Train Bridge) No longer swings, pedestrian traffic.Constructed in 1887 and opened 1889. Last train on the bridge was in 1996.
Grand Narrows Bridge Barra Strait, Bras d'Or Lake, Nova Scotia 45°57′35.75″N60°48′1.03″W / 45.9599306°N 60.8002861°W / 45.9599306; -60.8002861 (Grand Narrows Bridge) Was last opened for marine traffic on December 30, 2014 remaining open for marine traffic since that date, no longer swings, Rail Traffic cannot cross.Carrying the Cape Breton and Central Nova Scotia Railway (CBNS).
Hog's Back Bridge Rideau Canal, Ottawa, Ontario 45°22′11″N75°41′54″W / 45.36972°N 75.69833°W / 45.36972; -75.69833 (Hog's Back Bridge) Still swings, Vehicle TrafficThis bridge swings from one end. There is an adjacent fixed bridge over Hog's Back Falls
Iron BridgeThird Welland Canal, Thorold, Ontario 43°08′15″N79°10′38″W / 43.13750°N 79.17722°W / 43.13750; -79.17722 (Iron Bridge) No longer swings, Rail TrafficCarrying the CNR Grimsby Subdivision over the third Welland Canal.
Kaministiquia River Swing Bridge Kaministiquia River, Thunder Bay, Ontario 48°21′31″N89°17′15″W / 48.35861°N 89.28750°W / 48.35861; -89.28750 (Kaministiquia River Swing Bridge) No longer swings. Road and rail traffic only. Currently closed due to 29 October 2013 fire [1] Built in 1908 by Grand Trunk Railway; currently owned by the CNR
Little Current Swing Bridge North Channel, Little Current, Ontario 45°58′48″N81°54′50″W / 45.98000°N 81.91389°W / 45.98000; -81.91389 (Little Current Swing Bridge) Still swings, Vehicle Traffic (formerly rail)Built by Algoma Eastern Railway, 1913
Montrose Swing Bridge Welland River, Niagara Falls, Ontario 43°02′45″N79°07′11″W / 43.04583°N 79.11972°W / 43.04583; -79.11972 (Montrose Swing Bridge) No longer swings, Rail TrafficFormerly Canada Southern Railway, now CPR
Moray Bridge Middle Arm of the Fraser River, Richmond, British Columbia 49°11′30″N123°08′13″W / 49.19167°N 123.13694°W / 49.19167; -123.13694 (Moray Bridge) Still swings; Eastbound Vehicle TrafficConnects Sea Island, Richmond, BC (location of Vancouver International Airport) to Lulu Island, Richmond, BC
New Westminster Bridge Fraser River, British Columbia 49°12′29″N122°53′38″W / 49.20806°N 122.89389°W / 49.20806; -122.89389 (New Westminster Bridge) Still swings, Rail Traffic, formerly had 2nd deck for vehiclesBetween New Westminster and Surrey.
Pitt River Bridge Pitt River, British Columbia 49°14′52″N122°43′44″W / 49.24778°N 122.72889°W / 49.24778; -122.72889 (Pitt River Bridge) No longer swings, Vehicle TrafficTwin side-by-side bridges connecting Port Coquitlam, British Columbia to Pitt Meadows, British Columbia
Pitt River Railway Bridge Pitt River, British Columbia 49°14′42″N122°44′01″W / 49.24500°N 122.73361°W / 49.24500; -122.73361 (Pitt River Bridge) Still swings – Rail Traffic(Please Contribute)
Wasauksing (Rose Point) Swing Bridge South Channel, Georgian Bay, near Parry Sound, Ontario 45°18′54″N80°2′40″W / 45.31500°N 80.04444°W / 45.31500; -80.04444 (Wasauksing Swing Bridge) Still swings, Vehicle Traffic (formerly rail)Links Wasauksing First Nation (Parry Island) to the mainland at Rose Point
Welland Canal, Bridge 15 Welland Recreational Waterway, Welland, Ontario 42°58′37″N79°15′21″W / 42.97694°N 79.25583°W / 42.97694; -79.25583 (Welland Canal, Bridge 15) No longer swings, Rail TrafficBuilt by Canada Southern Railway, c.1910. Now operated by Trillium Railway
Welland Canal, Bridge 20 Approach Span2nd and 3rd Welland Canal, Port Colborne, Ontario 42°53′14″N79°14′58″W / 42.88722°N 79.24944°W / 42.88722; -79.24944 (Welland Canal, Bridge 20 approach) No longer swings, Abandoned (formerly rail)Abandoned 1998 when adjacent Vertical-lift bridge was dismantled.
Bergen Cut-off Bridge Red River, Winnipeg, Manitoba 49°56′49″N97°5′53″W / 49.94694°N 97.09806°W / 49.94694; -97.09806 (Bergen Cut-off Railway Bridge) Centre span permanently in open position, allowing unrestricted river trafficDecommissioned CPR railway bridge (last used in 1946)
Superstructure built by Dominion Bridge Co. 1913–1914
Pont CN-Du port Lachine Canal, Montreal, Quebec 45°29′24.9″N73°33′26.1″W / 45.490250°N 73.557250°W / 45.490250; -73.557250 (Canal Lachine Bridge) No longer swings.Abandoned CN railway swing bridge in the middle of Lachine Canal. Constructed in 1912 by the Dominion Bridge Company for the Grand Trunk Railway company. [2] The pivot system and the cockpit are still in place, but the bridge has not been operational since the late 1960s. [3]

China

Denmark

Egypt

El Ferdan Railway Bridge in Egypt; the longest swing bridge in the world, runs from the east of the Suez Canal to the west into Sinai. It is left open most of the time to allow sailing ships to pass in the canal, only closing during the passage of trains. El Ferdan Railway Bridge.jpg
El Ferdan Railway Bridge in Egypt; the longest swing bridge in the world, runs from the east of the Suez Canal to the west into Sinai. It is left open most of the time to allow sailing ships to pass in the canal, only closing during the passage of trains.

Estonia

France

Germany

India

Poira-Corjuem Bridge, Goa Poira Bridge.JPG
Poira-Corjuem Bridge, Goa

Ireland

Italy

The Ponte Girevole San Francesco di Paola in Taranto Ponte Girevole Taranto.jpg
The Ponte Girevole San Francesco di Paola in Taranto

Latvia

Lithuania

Chain Bridge, Klaipeda Klaipeda most obrotowy 1.jpg
Chain Bridge, Klaipeda

The Netherlands

The "Abtswoudsebrug", a swing bridge for bikers and pedestrians built in 1979 Delft Abtwoudsebrug.jpg
The "Abtswoudsebrug", a swing bridge for bikers and pedestrians built in 1979

Many inner cities have swing bridges, since these require less street space than other types of bridges.

New Zealand

(A "swing bridge" in New Zealand refers to a flexible walking track bridge which "swings" as you walk across.) [9]

Panama

Poland

South Africa

The Clocktower Bridge, in Cape Town, starting to close behind a small boat Clocktower Bridge in Cape Town.jpg
The Clocktower Bridge, in Cape Town, starting to close behind a small boat

Ukraine

United Kingdom

Traffic crossing the Northwich Road swing bridge on the Manchester Ship Canal at Stockton Heath, Warrington Northwich Road swing bridge, Warrington.jpg
Traffic crossing the Northwich Road swing bridge on the Manchester Ship Canal at Stockton Heath, Warrington
Hull Docks branch bridge Hull And Barnsley River Hull Bridge.jpg
Hull Docks branch bridge

In the UK, there is a legal definition in current statute as to what is, or is not a 'swing bridge' [11]

Cross Keys Bridge in Sutton Bridge which carries the A17 over the River Nene in Lincolnshire close to the border with Norfolk. Crosskeys Bridge Sutton Bridge Lincolnshire.JPG
Cross Keys Bridge in Sutton Bridge which carries the A17 over the River Nene in Lincolnshire close to the border with Norfolk.

United States

The former Chincoteague Channel Swing Bridge in Chincoteague, Virginia, now demolished. Chincoteague Channel Swing Bridge 002.jpg
The former Chincoteague Channel Swing Bridge in Chincoteague, Virginia, now demolished.

The largest double swing-span bridge in the United States is the 3,250 feet (990 m) long, 450 feet (140 m) navigable span, 60 feet (18 m) clearance George P. Coleman Memorial Bridge. [14]

A swing bridge near Belle Glade, Florida SpinningDrawbridge.JPG
A swing bridge near Belle Glade, Florida
The swing span of the double-deck I Street Bridge, in Sacramento, open for a ship. I Street Bridge Sacramento.jpg
The swing span of the double-deck I Street Bridge, in Sacramento, open for a ship.

Omaha NE Turn Style Bridge is now a historical landmark. Located 86H674H5+98 Used for rail transport. Connecting Council Bluffs, Iowa to downtown Omaha, Nebraska

Uruguay

Carmelo Bridge, Uruguay, during its inauguration in 1912. Puente giratorio de Carmelo en 1912.jpg
Carmelo Bridge, Uruguay, during its inauguration in 1912.

Vietnam

See also

Related Research Articles

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