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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.
The bridge inventory is developed for having a unified database for bridges, including the identification information; bridge types and specifications; operational conditions; and bridge data including geometric data, functional description, inspection data, etc. Bridge type and specifications classify the type of the bridge.
Around 46,100 of the 617,000 bridges across the United States, or 7.5% of all bridges, ... The Key Bridge was “fracture critical,” the National Transportation Safety Board said Wednesday.
List of toll bridges § United States; Category:Lists of bridges documented by the Historic American Engineering Record; Category:Lists of bridges on the National Register of Historic Places; Category:Lists of river crossings in the United States; Other topics. Transport in the United States; Rail transportation in the United States
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 ...
Huey P. Long Bridge, Jefferson Parish – one of the longest railroad bridges in the US: 7 km (4.3 mi) I-10 Bonnet Carré Spillway Bridge , St. Charles Parish – carries Interstate 10 over the Bonnet Carré Spillway , Lake Pontchartrain and LaBranche Wetlands
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.
Because of the bridge's design, it was considered "fracture critical"; there was no built-in redundancy to prevent the entire structure from collapsing if one component fails. In comparison, the I-35W Mississippi River bridge, another fracture-critical bridge that collapsed on August 1, 2007, received a sufficiency rating of 50. [12]