Section of foundation and reinforcement of concrete block sinking well
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by Erik Nissen Peterson.
The concrete blocks for the well casing are stacked on a concrete foundation ring. The ring can be cast in a wooden form, or more cheaply, in a ditch in the soil at the construction site.
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From: Farm Structures in Tropical Climates http://www.fao.org/inpho/vlibrary/s1250e/s1250e00.htm.
Edited by Lennart P. Bengtsson and James H. Whitaker, FAO copyright 2000.
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