[permaculture] Ferrocement water tank pix
David
david at h4c.org
Wed Dec 19 16:42:14 EST 2007
Charles,
Charles de Matas wrote:
> David wrote:<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> Diameter is not a consideration with regard to hydrostatic pressure, only depth.>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
> I know that. But I wasn't referring to hydrostatic pressure, I was refering to the hoop stress produced in the walls of the tank by the hydrostatic pressure. It's the product of the hydrostatic pressure and the tank diameter.
> I hope nobody thinks that he or she can build a 30 m. dia tank with the same wall thickness as a 3 m. dia tank.
>
Sorry if my reply was not clear. We're both right, just talking about
slightly different things.
Your point rendered mathematically? See
http://www.oasisdesign.net/water/storage/extras/TankCalculator.xls
d.
--
David William House
503-678-5162 (home)
503-206-1001 (cell)
"The Complete Biogas Handbook" www.completebiogas.com
"Make no search for water. But find thirst,
And water from the very ground will burst."
(Rumi, a Persian mystic poet, quoted in Delight of Hearts, p. 77)
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