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hippo11 (Structural) (OP)
24 May 07 18:35
for foundation design...and for that matter, a map of frost depths all over the US would be nice...does anyone know of anywhere I can find this?  thx
JedClampett (Structural)
24 May 07 19:03
It's old and unofficial, but "Foundation Engineering Handbook" by Winterkorn and Fang has a map of selected cities' frost depth on page 489.
The values in Tennessee are about 15 to 18 inches.
RWF7437 (Civil/Environmental)
24 May 07 20:19
In my State (Oregon) the State amendments to the Uniform Building Code includes such a map along with wind speeds and seismic zones. Check to see if your State does the same.  Also check with the Tenn. Transportation Agency, Bridge Design folks.  They probably have this data too.

good luck
civilperson (Structural)
24 May 07 20:51
Each city specifies the local footing minimum depth or the county might have guidelines.  Frost is the supposed reason.
csd72 (Structural)
25 May 07 10:37
As civilperson said, call the local building department of the town that it is in. The state code is one thing, but often the local town has slightly different criteria.

While your at it check the snow and wind load with them.

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