(Deborah Svoboda/KQED)

More than 30 large bolts on a section of the new eastern span of the Bay Bridge broke after workers tightened them. Bridge officials said on Wednesday that the bolts, ranging from nine to 25 feet in length, are located on the eastern foundation of the new self-anchored suspension bridge. We talk with Steve Heminger, head of the Metropolitan Transportation Commission, about what the discovery means for the safety of the new $6.4 billion span — and for its scheduled opening Labor Day weekend.

Guests:
Steve Heminger, executive director for the Metropolitan Transportation Commission

  • loujudson

    Any of the steel made in China?

  • Ambulamus

    First we hear that a supporting column failed tests, but will be used anyway. Now this. I’m not sure I can feel safe on this new bridge.

  • Roistacher

    Will there be enough room under the new span to accommodate all the trolls who have called in?

  • Javier Marquez

    What is the warranty period for the suppliers? (when is the responsibility for the failure turned over from manufacture failure to failure in maintenance procedures?)

  • Xheezie

    At 4′:47″, Joshua Johnson asks where did these bolts come from. Heminger replies that the bolts came from a supplier in Ohio, and it appears as if hydrogen got into the manufacturing process which tends to make steel overly brittle if you’re making galvanized steel, which the bolts are.

    Notice that Heminger did not say that the bolts were actually MANUFACTURED in Ohio. He does say that the main contractor on the bridge project, American Bridge Floor, has a “series of suppliers from all over the world…”

    “Came from a supplier in Ohio” is actually NOT the same as “Manufactured in Ohio.”

    So, WHO actually MADE these defective bolts, and WHERE were these made?

    And why don’t we get to hear that information, in this so-called “Age of Information??”

  • James Howells

    Hydrogen embrittlement does not , can not happen when steel is Galvanised ………It does happen when thin , high carbon steel in electro plated
    The usual component to suffer from this phenomenon is zinc electro plated springs.
    If zinc electroplated steel bolts have been used some one needs to be fired ….it is the least suitable product for any exterior application.

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