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.
4-949: The State Boat Channel Bridge is a twin-span bascule bridge in Suffolk County, New York , United States. It carries the Robert Moses Causeway over the Long Island New York State Boat Channel between Captree Island and Jones Beach Island , in Oak Beach and Captree on the Babylon – Islip town border. The 665-foot-long (203 m) bascule bridge meets the Ocean Parkway at a cloverleaf interchange . This interchange, which provides access to Captree State Park , Gilgo State Park and Jones Beach State Park , served as
8-411: The counterweights to the span may be located above or below the bridge deck. The fixed- trunnion (sometimes a "Chicago" bascule) rotates around a large axle that raises the span(s). The Chicago bascule name derives from the location where it is widely used, and is a refinement by Joseph Strauss of the fixed-trunnion. The rolling lift trunnion (sometimes a "Scherzer" rolling lift), raises
12-479: The same principle. Bascule bridges are the most common type of movable span because they open quickly and require relatively little energy to operate, while providing the possibility for unlimited vertical clearance for marine traffic. Bascule bridges have been in use since ancient times, but until the adoption of steam power in the 1850s, very long, heavy spans could not be moved quickly enough for practical application. There are three types of bascule bridge and
16-700: The southern terminus of the Robert Moses Causeway that leads to the Fire Island Inlet Bridge , the Fire Island Lighthouse , and Robert Moses State Park . The bridge underwent renovations during the 2000s. 40°38′33″N 73°15′48″W / 40.64250°N 73.26333°W / 40.64250; -73.26333 Bascule bridge The name comes from the French term for balance scale , which employs
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