Analysis ‘exonerates’ Dyson: executive

May 17, 2013 | 04:43 PM | Frank Haflich

Tags  Dyson, San Francisco-Oakland Bay Bridge, steel anchor rods, steel rods, California Department of Transportation, Caltrans, Metropolitan Transportation Commission, Toll Bridge Program Oversight Committee Bay Area Toll Authority

LOS ANGELES — Dyson Corp. has said that an analysis of steel anchor rods it made for the San Francisco-Oakland Bay Bridge "exonerates" the company on the failure of several of the rods.

"We made the product exactly to the specifications that they asked us," Dustin Johnson, director of sales at the Painesville, Ohio-based fastener systems fabricator, told AMM May 17.

Dyson, which supplied the rods to bridge contractors American Bridge Co., Corapolis, Pa., and Fluor Corp., Irving, Texas, had previously declined to comment (, April 1).

In March, 32 out of 96 galvanized ASTM A354 grade DB rods manufactured by Dyson in 2008 broke when they were tightened to connect shear keys, or seismic safety devices, on the bridge’s new east span.....

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