Engineering Expert On San Mateo-Hayward Bridge Crack

Construction_Engineering_INGUB362A westbound lane on the San Mateo-Hayward Bridge was closed last week after Caltrans officials decided to add an additional reinforcement plate beneath the bridge after a crack was discovered during an inspection.  The crack was found in a steel girder on the underside of the bridge that is part of a system that allows the structure to move back and forth during an earthquake, Caltrans spokesman Bob Haus said. The girder was installed as part of a seismic retrofit completed in 2001.

An engineering expert who performed an analysis of the bridge prior to the 2001 retrofit said the failure was likely caused by one of two things: either a major design flaw in the earthquake retrofit project or that the materials used for the bridge were defective.

Read more: fostercitypatch.com.

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