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Animation showing the operation of a drawbridge. A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat.In some forms of English, including American English, the word drawbridge commonly refers to all types of moveable bridges, such as bascule bridges, vertical-lift bridges and swing bridges, but this article concerns the ...
A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf ...
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 specific type of moveable bridge often found in castles.
The counterweighted four bar linkage type bascule bridge was designed by former Otis Elevator Company Chief Engineer Thomas Ellis Brown of New York and built in 1922 by the J. E. FitzGerald Construction Company of New London, Connecticut, according to its historical marker.
Some wooden components of the tracks have rotted or burnt away, and various electrical cables have been disconnected, but the metal structure remains largely intact, albeit rusted. This combination of factors attracts various types of visitors to venture out onto the tracks and even climb up the drawbridge, despite highly dangerous conditions.
In American English, the term drawbridge refers to any type of movable/moveable bridge. This category includes both functioning drawbridges and ones whose draw span is no longer able to open. This category includes both functioning drawbridges and ones whose draw span is no longer able to open.
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After considerable study and public debate, officials chose a plan that would double the capacity and increase the height of the drawbridge to reduce the frequency of openings. The new bridge would include two side-by-side drawbridges with a total of 12 lanes and 70 feet (21 m) of vertical navigational clearance at the draw span. [ 26 ]