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RE: Strength Mobilization Factor - TEDDS

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It does not appear that he is using the software as a black box, as he is asking questions about the technical basis for the equations in the software - exactly what he should be doing.  Certainly he should also be talking to TEDDS, but understanding the source documents is just as important.  And understanding USACE's EM 1110-2-2502 is a monumental task - seeking advice from experienced users is appropriate.  Ultimately, one must become comfortable that they understand the technical basis for the methods and inputs used by the software.
Bill Sherman

From: Bill Cain [mailto:bcainse(--nospam--at)]
Sent: Sunday, August 09, 2009 9:00 AM
To: seaint(--nospam--at)
Subject: RE: Strength Mobilization Factor - TEDDS

You really ought to be asking the TEDDS folks what their factor means and what it is based on. Using any software as a black box is a risky behavior. I hope you are just looking at it and not using it on a real project.
Bill Cain SE
Berkeley CA

> Date: Mon, 3 Aug 2009 10:46:01 -0500
> From: admin(--nospam--at)
> To: seaint(--nospam--at)
> Subject: Strength Mobilization Factor - TEDDS
> Does anyone have a resource that gives a good explanation of the
> strength mobilization factor for soil and how that relates to the
> safety factor?
> Specifically, I am using TEDDS software for a retaining wall analysis
> and the software asks for the soil mobilization factor. The default
> value is 0.67 as recommended by ASCE (apparently). I don\'t understand
> the results I\'m getting and I feel I need more information on how the
> strength mobilization factor applies.
> - Jeremy
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