Mackinac Bridge

a suspension bridge over the Straits of Mackinac, connecting the Upper and Lower peninsulas of Michigan: one of the longest suspension bridges in the world. 3800-ft. (1158-m) center span; 7400 ft. (2256 m) in total length.

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one of the longest and strongest suspension bridges in the world, spanning the Mackinac Straits from the Upper to the Lower Peninsula of Michigan, U.S. Designed by David B. Steinman (Steinman, David Barnard) in the wake of the failure of the Tacoma Narrows Bridge (1940), the Mackinac Bridge was not constructed until the 1950s because of World War II. The bridge measures 8,344 feet (2,543 m) between the main anchorages. Its 3,800-foot (1,158-metre) main span is stiffened by a truss 38 feet (13 m) deep, with open spaces on either side of the roadway and grid construction of the deck to permit the passage of wind gusts. Heavy pier foundations, the deepest 210 feet (64 m), were necessary to resist the ice masses that accumulate every winter in the Mackinac Straits. In November 1955 the incomplete bridge withstood a 76-mile-per-hour (122-kilometre-per-hour) gale. It was opened to vehicle traffic in 1957.

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Universalium. 2010.

Look at other dictionaries:

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  • Mackinac Bridge — 45.816388888889 84.7275 Koordinaten: 45° 48′ 59″ N, 84° 43′ 39″ W f1 …   Deutsch Wikipedia

  • Mackinac Bridge — noun a suspension bridge across the channel between the lower and upper peninsulas of Michigan • Instance Hypernyms: ↑suspension bridge • Part Holonyms: ↑Michigan, ↑Wolverine State, ↑Great Lakes State, ↑MI * * * a suspension bridge over the… …   Useful english dictionary

  • Mackinac Bridge Walk — The Mackinac Bridge Walk is an annual event held every Labor Day since 1958 in Michigan in which people may walk the length of the Mackinac Bridge. Walkers are traditionally led across by the governor of Michigan, currently Jennifer M.… …   Wikipedia

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  • Mackinac County, Michigan — Infobox U.S. County county = Mackinac County state = Michigan map size = 200 founded = October 26, 1818 [http://www.mackinaccounty.net/comminfo9548159.asp] seat = St. Ignace area total sq mi = 2101 area land sq mi =1022 area water sq mi =1079… …   Wikipedia

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  • Mackinac, Straits of — Channel connecting Lake Michigan with Lake Huron. Forming an important waterway between the Upper and Lower peninsulas of Michigan, U.S., the straits are 30 mi (48 km) long and 4 mi (6 km) wide at their narrowest point. They are spanned by the… …   Universalium

  • bridge — bridge1 bridgeable, adj. bridgeless, adj. bridgelike, adj. /brij/, n., v., bridged, bridging, adj. n. 1. a structure spanning and providing passage over a river, chasm, road, or the like. 2. a connecting, transitional, or intermediate route or… …   Universalium

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