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RE: Residential Cantilevered Retaining Walls.

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Title: Residential Cantilevered Retaining Walls.
Hi Bill,
 
It sounds like you have a standard residential basement wall.
 
If the wall is not backfilled prior to the floor being erected, then the reinforcement (if required) would only be on the inside face of the wall and not on the soil side.  You could also specify that the wall needs to be braced prior to backfilling if the floor is not yet installed.  Making the contractor obey this requirement is another issue...
 
Unless this is a super unique and/or exclusive house, most residential basement walls are sized and detailed as simple span.
 
Good luck
 
Dave Nuttall, P.E.
Green Bay, WI
-----Original Message-----
From: Bill Marczewski [mailto:bmarczewski(--nospam--at)pndast.com]
Sent: Tuesday, March 04, 2003 1:07 PM
To: SEOC Engineering Forum (E-mail)
Subject: Residential Cantilevered Retaining Walls.

I'm curious to know how the other people on the list design concrete retaining walls for residential structures.  If you design the wall as a cantilevered wall with reinforcing on tension face (soil side), then install the floor diaphragm it would seem you have just turned it into a restrained wall.  The restrained wall would appear to want the reinforcing on the opposite side (non-soil side).  Is anybody designing these as "Restrained Walls"?  If so, are you doing any special blocking where the joist is parallel to the wall beyond the first joist space?  Thanks for any comments received.


Bill S. Marczewski, P.E.
Peratrovich, Nottingham & Drage, Inc.
503-325-1250 Main; 503-325-9789 Fax
bmarczewski(--nospam--at)pndast.com
www.pnd-anc.com