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RE: Retaining wall rotation

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I say use (2 x H)/360, or .80" maximum for a 12' high wall

 -----Original Message-----
From: 	John P. Riley [mailto:jpriley485(--nospam--at)peoplepc.com]
Sent:	Thursday, May 24, 2001 11:27 AM
To:	Frank E. Stewart; seaint(--nospam--at)seaint.org
Subject:	Retaining wall rotation

A homeowner made an insurance claim on his retaining walls, one each side of
the front of his underground home.  Both walls have rotated since their
construction in 1979, one has an outward lean of about 1/8" in 8" (just had
my little torpedo level with me . . . not real accurate) and the other is
about 1/4" in 8"; both are 12' high tapering to 0' in 12' (i.e.: they are 45
deg triangles).

I am about to prepare a report, saying among other things that retaining
wall movement is inherent.  But I forget "how much" movement is to be
expected.  Of course, I know its impossible to say for all cases, but I'm
looking for an 'order of magnitude' number as a percent of height.
__________________
John P. Riley, PE, SE
Riley Engineering
20 Oakwood Drive, Blue Grass, Iowa 52726
Tel & Fax:  319-381-3949
jpriley485(--nospam--at)peoplepc.com


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