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RE: HUD permanent foundations

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There are shallow foundation systems out there (I've even used them in North Dakota and Canada) that involve sub-grade insulation that basically prevents a frost bulb from forming under the footings. Typically the footings or slab-edge is turned down just enough to enable the insulation to be protected by a minimum amount of soil (typically a 1'-0" as I recall).

Matthew Stuart
Structural Dept. - Manalapan
732-577-9889 x1283


-----Original Message-----
From: Jim Wilson [mailto:wilsonengineers(--nospam--at)yahoo.com]
Sent: Tuesday, March 22, 2005 1:35 PM
To: seaint(--nospam--at)seaint.org
Subject: HUD permanent foundations

I'm caught in a pickle with a family trying to buy a
mobile home with FHA funding.  The 48' long
double-wide is set masonry block piers on a concrete
slab in northeast PA.  There is also an unreinforced
8" skirt wall around the perimeter to create crawl
space.

HUD's permanent foundation guide seems to require that
frost footings be in place under these structures.  Is
this absolutely the case in any frost zone?  There are
so many trailer parks around here and I would be
surprised if 1% of them had a real permanent
foundation.

The home does have required bracing and tie-downs per
the requirements.  My thought to get out of the frost
footing requirement was to insulate the skirt wall,
thereby keeping the piers on ground that was not
seccessptible to frost.

I appreciate any help I can get on this.  I hate to be
held responsible for tanking a real estate deal!

Jim Wilson
Stroudsburg, PA

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