Bascule bridge
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A bascule bridge is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- or double-le
The Wells Street Bridge (Chicago), a double-leaf fixed-trunnion bascule bridge
The counterweight is often hidden below the road surface in the bridge abutment.
A rolling-lift bascule bridge in the down position
Moveable bridge
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A moveable bridge, or movable bridge, is a bridge that moves to allow passage for boats or barges. In American English, the term is synonymous with drawbridge, and the latter is the common term, but d
Bascule bridge
…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, throughout its upward swing to provide clearance for boat traffic. It may be single…
Madison Street Bridge, a bascule bridge over the Chicago River in Chicago, IL
The Rode Brug (Red Bridge) across the Vecht river in Utrecht, Netherlands
The Marine Parkway–Gil Hodges Memorial Bridge in New York City