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Jun 03 What Is The Difference Between Crushed Stone Sand Riv

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Frost depth in crushed stone foundation engineering Jul 04 2003018332I have a project where a 6 inch dia water line will be buried in 57 crushed stone The thickness of stone layer could be as much as 7 feet Local codes require the frost depth to be 3 feet Question At locations where the pipe is buried in ASTM 57 stone is the frost depth still 3 feet or should it be deeper

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