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Re: [Fwd: passive pressure for retaining wall]

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The logic of using the method as set forth on page 256 falls apart when the
key is placed at the extreme end of the heel of the retaining wall. This
office places the key back from the toe of the retaining wall approx. at the
1/3 point of the base of the retaining wall footing. Reason: This is a place
of high vertical pressure exerted from the retaining wall onto the underlying
soil and yet is not so close to the toe as to allow the soil to creep away
from the high pressures.

I would be interested to know the level of acceptance with the local Building
Officials. This method of increasing the "allowable" passive soil pressures
is not accepted to my knowledge. Therefore it is an interesting theory that
may actually occur but in the real world of getting a plan checker to agree
with you may not hold up.