The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

The next critical stage in replacing Balliemore Bridge, Glen Lean, Cowal, took place recently. Six precast, 15-metre-long, ...

A beam or "girder" bridge is the simplest and most inexpensive kind of bridge. According to Craig Finley of Finley/McNary Engineering, "they're basically the vanillas of the bridge world." ...

Three images from the Ohio Department of Transportation, taken in recent days, depict the damaged steal beams under the southbound lanes of Interstate 471 just before it connects to the bridge.