COLUMBUS, Ohio (AP) -- The Ohio Department of Transportation is devoting extra attention to 133 highway and interstate bridges that are missing redundant support elements common in most other bridges.
The Columbus Dispatch (http://bit.ly/wLPfOA ) reports the spans classified as "fracture-critical" could collapse if their main supports buckled because they don't have the extra support features. Most of those bridges are older, but a few were built in the past 15 years.
ODOT structural engineering office administrator Tim Keller says the bridges require more rigorous inspections and maintenance but aren't inherently dangerous. He said such bridges get detailed visual inspections every two years that cost up to 10 times as much as inspections for other bridges.
The structures make up less than 1 percent of the more than 14,000 bridges along Ohio highways and interstates.
Information from: The Columbus Dispatch, http://www.dispatch.com