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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- or double-leafed.
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 double-beam drawbridge, seesaw or folding bridge is a movable bridge . It opens by rotation about a horizontal axis parallel to the water. Historically, the double-beam drawbridge has emerged from the drawbridge. A (double-beam) drawbridge has counterweights, so that operating requires less energy compared with such a bridge without ...
The Cortland Street Drawbridge (originally known as the Clybourn Place drawbridge) [4] over the Chicago River is the original Chicago-style fixed-trunnion bascule bridge, designed by John Ericson and Edward Wilmann. [3] When it opened in 1902, on Chicago's north side, it was the first such bridge built in the United States.
From the west side of the rail via tunnel, four tracks converged into three, and then into two tracks to pass over the Hackensack Drawbridge. [7] By 1913 the rail line, including the bridges across the rivers, was raised about 30 feet (9.1 m) to avoid conflicts with maritime traffic in the newly developing port [8] The draw span of the PD Draw over the Passaic had been relocated 185 feet (56 m ...
The Shark River Draw, commonly known as the Belmar Bridge, is a moveable drawbridge that over the Shark River Inlet, an inlet at the mouth of the Shark River in the towns of Belmar and Avon-by-the-Sea Monmouth County, New Jersey, United States, just west of the Atlantic Ocean.
The Raritan Bay Drawbridge, also known as River-Draw, Raritan Bay Swing Bridge, and Raritan River Railroad Bridge, is a railroad swing bridge crossing the Raritan River 0.5 miles (0.8 km) from where it empties into the Raritan Bay in Middlesex County, New Jersey, United States.
The Prescott Drawbridge, also called the Point Douglas Drawbridge, is a steel girder bridge with a double-leaf bascule drawbridge section. The roadbed of the drawbridge span is a steel grate. The bridge carries U.S. 10 across the St. Croix River and connects Prescott, Wisconsin, with the Point Douglas park area of Denmark Township, Minnesota.