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Re: retaining wall design

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This is another case where engineers and building officials have different opinion.    Some officials require seismic in the design of retaining wall.  I can't find anywhere in the code that this is required.  I would like to find out from the list, especially the experts, of what is their take on this issue.  I think we need some clarification on this.  If it is required to design the retaining wall for seismic then let the code especifically say so.  If not then something must be done to avoid any waist of money! 

A S Quilala P.E.

In a message dated 7/12/2002 4:33:09 PM Pacific Standard Time, grm(--nospam--at) writes:


Thank you for your input.

----- Original Message -----
From: Stanley E Scholl <sscholl2(--nospam--at)>
Date: Wed, 10 Jul 2002 21:09:19 -0700
To: seaint(--nospam--at)
Subject: Re: retaining wall design

> I believe you need to arrange for someone to excavate and determine the
> layout of the existing building footings. You should also study the Code
> requirements for building next to existing buildings. The owner of the
> building may be required to underpin/lower his footings to meet the new
> requirements from your project. You may have to building your wall in
> short sections while skipping sections which will be constructed in later
> stages.
> Stan Scholl, PE
> Laguna Beach, CA
> On Wed, 10 Jul 2002 09:43:11 -0500 "G Manandhar" <grm(--nospam--at)>
> writes:
> > I have been asked to design a five foot tall retaining wall.  A three
> > story apartment complex lies about three feet away from the proposed
> > retaining wall.  The client does not have access to the structural
> > drawings for the apartment complex.  Could you all advice me on what
> > to look out for during the desing phase and also during the
> > construction phase so that there is no damage to the apartment
> > complex.
> >
> > Thanks in advance.
> >
> > Gautam Manandhar
> > --