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RE: Enercalc-Pole Embedment in Soil

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Go much over 12 feet and you may no longer have a rigid pole with respect to
the soil.  I believe that the 12 feet came out of the original tests done by
the Billboard industry.  I will push the equation for large piers but not by

George Richards, P. E.

-----Original Message-----
From: OTATSDGSE(--nospam--at) [mailto:OTATSDGSE(--nospam--at)]
Sent: Thursday, November 09, 2000 5:46 PM
To: seaint(--nospam--at)
Subject: Enercalc-Pole Embedment in Soil

Enercalc calculates the soil pressure at 1/3 depth by taking the full 
calculated embedment depth, d.

UBC defines d as the "depth of embedment in earth in feet but not over 12 
feet for the purpose of computing lateral pressure."

So, for d greater than 12 feet, Enercalc still takes the full d rather than 
12 feet in calculating the passive soil pressure. This yields unconservative


Does anybody know why? Am I missing something? I contacted Enercalc three 
days ago, but received no response yet, and their office is closed till next


Thanks in Advance.