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    Re: SF Bay Bridge
    From: Norm Goldblatt
    Date: 2013 Apr 3, 14:48 -0700

    Hi, Lu. I can find the photos, but they were just googled and copied from various news items. I lucked on two shots, one a closeup of one of the clusters with measurable bolt diameters, and another showing same cluster from farther away, but with a human figure. The rest is math. I got 3.5 inches, the paper said anything from 'the size of a man's thigh' to 3 inches. I drew them as 3 inches.

    Of course, the 'punchline' is that although most of the steel in the bridge came from China, these bolts were made right here in good ole' USA by the Dyson Company in Ohio.
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