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A fracture critical bridge is a bridge or similar span that is vulnerable to collapse of one or more spans as a result of the failure in tension of a single element. While a fracture critical design is not considered unsafe, it is subject to special inspection requirements that focus on the tension elements of its structure.
CRITICAL CONDITION - advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless the bridge is closely monitored, it may be necessary to close the bridge until corrective action is taken. 2
The steel used was T1 steel, which in the early 1960s was "innovative material" but is much weaker than modern steel. Classification of the bridge is "fracture critical" because if one part of the bridge should fail, the entire bridge could be at risk.
But the Key Bridge is one of 17,468 fracture-critical bridges in the US out of 615,000 total bridges, she said, citing the Federal Highway Administration. ... with steel portions of the bridge ...
Bridges such as the one in Baltimore are classified as "fracture critical" by the federal government - meaning that if one portion of the bridge collapses, it's likely to take down the rest of the ...
The building was a composite steel-frame and steel-reinforced concrete design. [18] On August 1, 2007, the I-35W Mississippi River Bridge in Minneapolis, Minnesota collapsed during afternoon rush hour, resulting in the deaths of 13 people. The collapse was attributed to the failure of a gusset plate connecting two members within one of the main ...
Steel bridges in the United States (1 C, 936 P, 1 F) W. ... Pages in category "Metal bridges in the United States" The following 188 pages are in this category, out ...
Pages in category "Steel bridges in the United States" The following 200 pages are in this category, out of approximately 936 total. This list may not reflect recent changes .