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Re: Cassion Steel Casing check

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        You might try Roark, "Formulas for Stress and Strain"
H. Daryl Richardson
----- Original Message -----
Sent: Tuesday, April 07, 2009 11:22 AM
Subject: Cassion Steel Casing check

I need to design check 36" dia, 30'+ deep, caisson steel casing wall
thickness with rail loads about 10' from caisson.
It should be the earth passive pressure that will  be critical.
Any formulas for hoop  stress (tensile) in walls from passive pressure available.