Table bridge
A table bridge is one of the types of moveable bridge in which the deck moves vertically. Two or four hydraulic pillars under the bridge, one or 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.
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 |
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.