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The National Bridge Inventory (NBI) is a database, compiled by the Federal Highway Administration, with information on all bridges and tunnels in the United States that have roads passing above or below them. That is similar to the grade-crossing identifier number database, compiled by the Federal Railroad Administration, which identifies all ...
Fracture critical bridge. 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 ...
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.
Laughery Creek Bridge, Dearborn County; only known example of a Triple Whipple Truss bridge in the world. Lincoln Memorial Bridge, downtown Vincennes to Illinois (old US 50) Parke County Covered Bridges. Sherman Minton Bridge, New Albany to Louisville, Kentucky. William H. Natcher Bridge, Rockport to Owensboro, Kentucky.
The Key Bridge was “fracture critical” and did not have any redundancy, Homendy said. ... But the Key Bridge is one of 17,468 fracture-critical bridges in the US out of 615,000 total bridges ...
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 ...
Following the Minneapolis incident, such age-related disasters in fracture-critical bridges are now avoided by finding and repairing cracks in a required thorough inspection every two years. Eighteen thousand bridges in the United States are labelled fracture-critical (from their design) and require crack inspections. [5]
In September 2013, United States Department of Transportation (USDOT) rated the Whitney Young Memorial Bridge both "fracture critical" and "structurally deficient". The "fracture critical" rating meant that the if a single component of the bridge fails, the entire bridge would collapse.