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RE: Residential Foundation Tipping
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Residential Foundation Tipping
- From: "David Maynard" <d_maynard(--nospam--at)wester-wetstein.com>
- Date: Fri, 20 Jun 2008 12:45:11 -0600
Title: Re: Residential Foundation Tipping
I am of a mind to agree with you. It seems awfully narrow for a
continuous footer. This was the recommendation coming out of the Soils
I believe there is a fix, but I wanted to pick the minds of those here
before I dive in. I think this problem could be, at least, halted with
some helical pier tie-backs. It could be corrected, but it may cause
damage elsewhere around the house.
From: Tarek Mokhtar
Sent: Friday, June 20, 2008 12:41
Subject: Re: Residential
I do not think an 8" x 16" "footer" works for a 9'
tall retaining wall
I *assumed* it's a basement wall.
In a message dated 6/20/08 11:01:53 AM, mblangy(--nospam--at)satco-inc.com writes:
I love these kinds of things. I used to
work for an veteran engineer who got these calls from colleagues a lot.
So there is no lateral
earth pressure on either side of the wall, correct? Is there a SOG
present on either side?
From: David Maynard
Sent: Friday, June 20, 2008 10:38
Subject: Residential Foundation
Got this call earlier this week. Like to
hear what everyone has to say.
It's a residential foundation, 9'-3" wall
on top of 8" by 16" continuous footer. Reinforcing
unknown. The wall is actually tipping into the building. Anchor
bolts on the outside have broken the concrete out at several locations.
Soils report says it's a sandy-clayey-silt. Took samples from the surface
and brought to another dirt-engineer who, at sight and touch, believes it to be
a lean or fat clay. *shrug* Jury is still out on this one.
Current landscaping is exposed backfill, or NO landscaping at all. There
is a perimeter sub-drain (one of those perforated pipes surrounded by Styrofoam
peanuts in a mesh sock) around the base of the foundation. House, and
wall where damage exists, is about 100 feet away from the base of a hill.
There appears to be positive drainage away from the house.
I have my own suspicions as to what could have
happened, but I am curious if anyone has run into this on their end.
Anyone? Anyone? Foundation damage that I have typically seen is
either settlement and heave.
Dave Maynard, PE
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