Two Bolt Batches At Center of Bay Bridge Probe
FEATURE
Officials investigating the 32 snapped anchor rods on the new $6.4 billion eastern span of the Oakland Bay Bridge have narrowed their focus to two “distinct” batches of bolts manufactured by Ohio-based Dyson Corporation.
One batch included a total of 96 rods manufactured and installed in 2008. The “failed bolts” were part of that batch, which was encased in concrete as part of shear key construction.
A second batch of anchor rods, totaling 192, are through bolts manufactured in 2010 and installed in 2011.
Those two batches of anchor rods – ranging from 9 feet to 24 feet in length – are at the center of an investigation into how specialty bolts from a respected domestic manufacturer failed within days of coming under load on a major U.S. bridge. ©2013 GlobalFastenerNews.com
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