04-04-2008, 07:58 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,583
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go to your browser and type in "underpinning." the definition shows up in "wikipedia" and explains what it is. pick several sites from your browser on how underpinning is accomplished and go find out. there are several methods. one involves driving a helical caisson into bed rock.
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