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see bridgebridge,
structure built over water or any obstacle or depression to allow the passage of pedestrians or vehicles. See also viaduct. Early Bridges

In ancient times and among primitive peoples a log was thrown across a stream, or two vines or woven fibrous ropes (the
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At the entrance to fortifications, a bridge over the moat or ditch, hinged and provided with a raising and lowering mechanism so as to hinder or permit passage.
See also: Bridge



a bridge with a movable span to permit the passage of ships. Drawbridges are usually built across rivers traveled by large ships when conditions make it technically and economically inadvisable to construct a bridge on high piers and with long approaches. The movable span of a drawbridge can be of the vertical-lift, swing, bascule, balance-beam, or rolling-lift type; the choice of type depends on local conditions. Construction of a drawbridge span requires either massive piers or towers to house the mechanisms and engines required for moving the span. Electric and hydraulic drives are the most common, and drawbridges are often equipped with backup drives from internal-combustion engines. The movable span generally has light-duty structural members, with trusses or beams of steel or lightweight alloys.


Kryzhanovskii, V. I. Razvodnye mosty. Moscow, 1967.


(civil engineering)
Any bridge that can be raised, lowered, or drawn aside to provide clear passage for ships.


At the entrance of fortifications, a bridge over the moat or ditch, hinged and provided with a raising and lowering mechanism so as to hinder or permit passage.


a bridge that may be raised to prevent access or to enable vessels to pass
References in periodicals archive ?
As we build drawbridges for tomorrow, we have to stop and look at diversity.
London Irish, Sale, Harlequins and Northampton have all at one time been outside the top flight, where would their inalienable rights have been had the drawbridge snapped shut then?
At the boutique end of the range we have seen many drawbridge closures for a wide variety of "liquidity issues", and they include funds at places like Brandeaux, LM Investment, Pioneer and Arch.
And, yes, the drawbridge actually works at the touch of a button, winding the rope around "wheels" fashioned from old wooden barstools.
Drawbridge (named for the railroad drawbridges over sloughs at both ends of the marshy island) got its start around 1880, when the South Pacific Coast Railroad stationed a bridge tender here.
All guests stay at the Drawbridge Inn, a three-star hotel that boasts three pools, tennis courts and health & fitness facilities.
State Tourism, Culture and Communications Committee chairman Ariffin Deraman said he was optimistic that the areas surrounding the bridge would become must-visit locations for tourists to feast their eyes the first drawbridge in Southeast Asia.
In addition to the temporary drawbridge the $60 million project includes demolishing the existing drawbridge and replacing it with a new drawbridge.
11 May 2018 - California, US-based advertising and marketing company Gimbal has acquired the managed media business unit of California, US-based digital identity management group Drawbridge, the company said.
We saw from the audience the way Britain has now split between those who believe our problems can only be solved by pulling up the drawbridge and those who want to strengthen the bridge across the Channel.
Let's pull up the drawbridge SIR - Represented by Russell Brand, an honest luminary but with rather inconclusive ideas, it seems a great chunk of the population is groping in the dark for a new economic and political direction.
Drawbridge is one of several startups that has figured out how to follow people without cookies, and to determine that a cellphone, work computer, home computer and tablet belong to the same person, even if the devices are in no way connected.