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Re: wine tanks

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Matthew,

        This is very interesting.  Thanks for reporting it.

Regards,

H. Daryl Richardson

Matthew Jordan wrote:

> regarding Mr. Yang's wine tanks,
>
> Coincidently just this past weekend I went on a tasting/ tour of a well
> known winery in the heart of zone 4. I was amazed when we got to the eight
> 25,000 gallon stainless tanks, almost all had the classic "elephants foot"
> bulging at the bottom of the tank, some even looked to have twisted! They
> look like someone stepped on a beer can. I'm guessing about 12-14 ft. dia.
> and 18-20 ft. tall. The guide explained that the tanks had been bolted down
> and there was a 5-point something EQ in about 1985-86. He said some "seismic
> experts" came out to investigate and said the tanks were OK to use and that
> the damage probably occurred because they were bolted down. The experts
> recommended that ALL OF THE BOLTS BE CUT OFF. A couple years later ('89)
> loma prieta hit, centered less than 25 miles away. Most of the tanks moved
> (slid) on the concrete pad a few inches but NO further damage occurred to
> any of them. They are in use to this day (full), Not bolted, all mis-aligned
> by a few inches!
>
> Matt Jordan, SE
>
>
>
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