15-01-2011, 09:05 PM
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Supernova Searcher
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Join Date: Mar 2005
Location: Cambroon Queensland Australia
Posts: 9,326
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Quote:
Originally Posted by mswhin63
I don't have much problem with the Math L x W x H faiirly simple, just in the past concrete suppliers may provide there own calculation, The 10-20% is what allow for any practicle job.
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Thankyou 
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