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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