Table bridge

Table bridge
	Animation of operation
Ancestor	Plate girder bridge,
Related	Lift bridge, bascule bridge, submersible bridge
Descendant	None
Carries	Automobile, pedestrians
Span range	Short
Material	Steel
Movable	Yes
Design effort	Medium
Falsework required	No

A table bridge is a moveable bridge in which the deck moves along the vertical axis. Four hydraulic pillars under the bridge, two at each end, raise the bridge deck to allow barge traffic to pass beneath it. In contrast to a lift bridge, where the deck is pulled upwards along towers, the deck of a table bridge is pushed upwards by otherwise hidden pillars. The name originates from the fact that when open it resembles a table.

The total space required by a table bridge is hardly larger than the bridge deck, which is not the case with a thrust bridge. Unlike a lift bridge this type has only slight visual impact upon its surroundings when closed for use by road traffic. This is very well demonstrated by the Pont levant Notre Dame at Tournai in Belgium.

Examples of table bridges

Several rivers and waterways are home to multiple examples of table bridges. These include but are not limited to:

Erie Canal in New York between Lockport and the Genesee River is home to one of the largest collection of table bridges
Gulf Intracoastal Waterway between the Judge Perez Bridge in Louisiana and the Veterans Memorial Bridge in Texas (including Bayou Lafourche and Bayou Terrebonne in Louisiana) features several table bridges
Trent-Severn Waterway in Ontario; both table bridges and bobtail swing bridges are located along its entire length

A table bridge in operation

Left: Looking across the Pont levant Notre Dame (in front of the first row of buildings); Center: Seen from the same viewpoint, the bridge is up; Right: Overlooking the canalized river, a self-propelled canal boat passes

gollark: This is the real true Macron lore.

gollark: ?tag create top2vec The assumption the algorithm makes is that many semantically similar documents are indicative of an underlying topic. The first step is to create a joint embedding of document and word vectors. Once documents and words are embedded in a vector space the goal of the algorithm is to find dense clusters of documents, then identify which words attracted those documents together. Each dense area is a topic and the words that attracted the documents to the dense area are the topic words.

gollark: As planed.

gollark: You need a ™ symbol or you will not have a ™ symbol.

gollark: ↑ this explains what is really going on

Bridge-related articles
Structural types	Arch bridge Bascule bridge Beam bridge Box girder bridge Bridge–tunnel Burr truss Cable-stayed bridge Canopy bridge Cantilever bridge Cantilever spar cable-stayed bridge Covered bridge Crib bridge Double-beam drawbridge Extradosed bridge Jet bridge Log bridge Moon bridge Moveable bridge Multi-way bridge Navigable aqueduct Pile bridge Pontoon bridge (Vlotbrug) Suspension bridge (types) Swing bridge Tilt bridge Timber bridge Through arch bridge Transporter bridge Truss bridge Tubular bridge Viaduct Visual index to various types
Lists of bridges by type	List of bascule bridges List of bridges List of bridge–tunnels List of cantilever bridges List of covered bridges List of medieval stone bridges in Germany List of multi-level bridges List of road–rail bridges List of toll bridges
Lists of bridges by size	By length Suspension bridges Cable-stayed bridges Cantilever bridges Continuous truss bridges Arch bridges Masonry arch bridges Highest Tallest
Additional lists	Bridge failures Bridge to nowhere
Category

Table bridge

Examples of table bridges

A table bridge in operation

See also