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RE: Precast tank

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Question #1: Would any of you seal a drawing based on past preformance of the product alone?
No

Question #2: This tank will be filled with water, equalizing the pressures and reducing the moments to near zero, is this cast more realistic to analyze? Only if you can be assured that the tank will NEVER be emptied. I would be very skeptical of that. It requires a high degree of faith in the O&M of the tank for which you have no control.

Regards,
Harold Sprague




From: "Chad Van Kampen" <Chad(--nospam--at)GeraceConstruction.com>
Reply-To: <seaint(--nospam--at)seaint.org>
To: <seaint(--nospam--at)seaint.org>
Date: Tue, 7 Dec 2004 10:51:24 -0500

I was recently asked to review a tank for a precaster in order to prove
that the tank is sufficient to support the earth and liquid fill prior
to him signing off on the building.  This particular tank has been used
since 1947 and not a one has had any problems.  Looking at this tank,
which has a 3" wall and minimum WWF, the numbers will not come close to
proving it works, yet they never have has problems.

Question #1:  Would any of you seal a drawing based on past preformance
of the product alone?

Question #2:  This tank will be filled with water, equalizing the
pressures and reducing the moments to near zero, is this cast more
realistic to analyze?

Thanks for you help,


Chad Van Kampen P.E.
General Manager / Precast
Gerace Construction
(p) 989-496-2440 ext. 15
(f) 989-496-2465


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