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Bridge twisted and collapsed over State Route 49 while under construction. The expressway and the bridge itself were closed to the public at the time. 1 killed, 9 injured [54] Total collapse Bridge collapsed as workers were screeding a concrete surface on the bridge. The machine had made it to the bridge's midspan before the entire bridge ...
A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end (called cantilevers).For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete.
The 1902 Highland Park Bridge was a cantilever through truss bridge that carried two streetcar tracks across the Allegheny River and Sixmile Island between the Pittsburgh neighborhood of Highland Park and Sharpsburg, Pennsylvania. By the 1930s, the bridge had become notorious for its narrowness and chronic maintenance problems, prompting ...
Later, seismic problems made the 1927 span unsafe in case of an earthquake, and led to the construction, and 2003 opening, of a replacement: a suspension bridge officially named the Alfred Zampa Memorial Bridge, in memory of iron worker Al Zampa, who played an integral role in the construction of numerous San Francisco Bay Area bridges. The ...
Harder Road Bridge, off State Route 417, was badly damaged by Tropical Strom Fred floodwaters in 2021. It is expected to be replaced in early 2025.
Written alerts of bridge problems were missing, Pa. auditors said. Auditors said information included in inspection reports differed based on which PennDOT district was handling the check and ...
However, by 1922 one of the better known advisors on cantilever and suspension bridge structures noted the peculiar strengths represented in the Cologne bridge’s design. David B. Steinman ’s running dispute with J. A. L. Waddell about the relative costs of suspension and cantilever bridges continued a debate with roots in the Quebec Bridge ...
The Quebec Bridge is a riveted steel truss structure and is 987 m (3,238 ft) long, 29 m (95 ft) wide, and 104 m (341 ft) high. Cantilever arms 177 m (581 ft) long support a 195 m (640 ft) central structure, for a total span of 549 m (1,801 ft), still the longest cantilever bridge span in the world.