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RE: retaining wall design

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BOCA '96 also includes similar language in 1805.3 for Seismic Categories D
and E.

-----Original Message-----
From: Haan, Scott M. [mailto:HaanSM(--nospam--at)ci.anchorage.ak.us]
Sent: Saturday, July 13, 2002 3:13 PM
To: 'seaint(--nospam--at)seaint.org'
Subject: RE: retaining wall design


2000 IBC 1802.2.7 says the soils investigation for seismic design categories
D, E and F are supposed to include a determination of lateral pressures on
basement and retaining walls due to earthquake motions.

-----Original Message-----
From: G Manandhar [mailto:grm(--nospam--at)engineer.com]
Sent: Saturday, July 13, 2002 10:39 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: retaining wall design


Regarding seismic design of retaining walls, the UBC is silent on
seismic design requirements.  However, the California Building Code
requires seismic design for retaining walls over 12 feet in height. In
my practice, I automatically consider seismic forces - whether the code
requires is or not, seismic forces in California is a fact of life.

Gautam


----- Original Message -----
From: ASQENGG2(--nospam--at)aol.com
Date: Sat, 13 Jul 2002 04:08:36 EDT
To: seaint(--nospam--at)seaint.org
Subject: Re: retaining wall design


> 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)engineer.com writes:
>
>
> > Stan:
> >
> > Thank you for your input.
> >
> > Gautam
> > ----- Original Message -----
> > From: Stanley E Scholl <sscholl2(--nospam--at)juno.com>
> > Date: Wed, 10 Jul 2002 21:09:19 -0700
> > To: seaint(--nospam--at)seaint.org
> > 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)engineer.com>
> > > 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
> > > > --
> >
>
>

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