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The Tacoma Narrows Bridge, with a main span of 2,800 feet (850 m), was the third-longest suspension bridge in the world at that time, following the George Washington Bridge between New Jersey and New York City, and the Golden Gate Bridge, connecting San Francisco with Marin County to its north.
The first Tacoma Narrows Bridge was a suspension bridge in Washington that spanned the Tacoma Narrows strait of Puget Sound. It dramatically collapsed on November 7, 1940. The proximate cause was moderate winds which produced aeroelastic flutter that was self-exciting and unbounded, opposite to damping.
Received minimal media attention as WWII began the next day. The bridge was finished in 1943 as the longest concrete arch bridge in the world until 1964. Tacoma Narrows Bridge: Tacoma, Washington: United States 7 November 1940: Road bridge, cable suspension with plate girder deck Aerodynamically poor design resulted in aeroelastic flutter
The Tacoma Narrows Bridge is a pair of twin suspension bridges that span the Tacoma Narrows strait of Puget Sound in Pierce County, Washington. The bridges connect the city of Tacoma with the Kitsap Peninsula and carry State Route 16 (known as Primary State Highway 14 until 1964) over the strait.
The Tacoma Narrows Bridge had a width-to-span ratio of 1 to 72, while the proposed Mackinac design had an even more extreme width-to-span ratio of 1 to 92. [8] It wasn't until Steinman took into account what was learned at Tacoma and brought on Woodruff as a design engineer that the Mackinac Bridge was finally built starting in 1954.
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On November 7, 1940, the low pressure system that later developed into the storm was affecting the Pacific Northwest and produced the 40 mph (64 km/h) winds that destroyed the Tacoma Narrows Bridge. On November 10 the fast-moving storm crossed the Rocky Mountains in just two hours on its way to the Midwest. [6] [7]
Another bridge was completed to carry eastbound traffic in 2007. In response to concerns after the failure of the Tacoma Narrows Bridge in 1940 and a major San Francisco Bay windstorm in 1951, the Golden Gate Bridge, for which Moisseiff had served as a consulting engineer during construction, was briefly closed.