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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.
The bridge may be stiffened by the addition of cables that do not bear the primary structural or live loads and so may be relatively light. These also add stability in wind. An example is the 220-meter-long (720 ft) bridge across the river Drac at Lac de Monteynard-Avignonet: this bridge has stabilizing cables below and to the side of the deck.
A contract for the substructure of the bridge was given to American Bridge Company. [6] The pin-connected drawbridge was designed by Alfred P. Boller, an authority on deep bridge foundations, to allow the bridge to pivot/swing, clearing a path for through river travel. [9] The 3 spans of the bridge are all composed of rivet-connecting steel ...
A moveable bridge, or movable bridge, is a bridge that moves to allow passage for boats [1] or barges. [2] In American English, the term is synonymous with drawbridge , and the latter is the common term, but drawbridge can be limited to the narrower, historical definition used in some other forms of English, in which drawbridge refers to only a ...
The bridge carries Highway 6 (formerly Highway 68) across a narrow channel separating Manitoulin Island from the much smaller Goat Island, forming the only land access.It consists of two 21 m (70 ft) deck plate girder approaches on the north end (Goat Island) and a single 18 m (60 ft) deck plate girder approach on the south end (Manitoulin Island), with a 112 m (368 ft) through swing bridge span.
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Scale Lane Footbridge is an apostrophe-shaped pedestrian swing bridge in Hull, England. The bridge has a rotating mechanism, allowing it to swing open horizontally, letting vessels pass beneath on the River Hull. It was the first bridge in the world to allow pedestrians to remain on the bridge while it is in motion.
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