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permaculture - Re: [permaculture] Ferrocement water tank pix

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  • From: David <david@h4c.org>
  • To: permaculture <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Ferrocement water tank pix
  • Date: Wed, 19 Dec 2007 13:42:14 -0800


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
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"The Complete Biogas Handbook" www.completebiogas.com

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(Rumi, a Persian mystic poet, quoted in Delight of Hearts, p. 77)





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