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» ICC Bulletin Board » Code Chat » Building and Residential Codes -- Non-Structural Issues » Frostline

Author Topic: Frostline
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I hope this is not a silly question. Is there a code or a data where I can find the frostline for every location in the US?

For example I want to know the frostline for Fargo, ND. I was told it was 4.5 feet because they have adopted the UPC. Obviously I do not have a copy of the UPC. So, here are the silly questions:

1. Can anybody help me verify this by sending me a copy of the UPC page or just hit me in the head with his knowledge? [Smile]

2. Is there another source that is definitive that show the correct frostlines for every location in the US?

Thanks for bearing with me and for any type of response. [Smile]

Posts: 14 | Registered: Aug 2009  |  IP: Logged
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Here is the best I found. Don't know how accurate it is though!


God Bless Our Troops

"Built to Code" = building your house to the worst the law will allow!

Posts: 694 | From: Texas | Registered: Jan 2006  |  IP: Logged
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The UPC does not determine the frost depth

2006 UPC 609.1.......All water service yard piping shall be at least twelve(12) inches below the average local frost depth.

Ask for the code section

If you buy the statement you buy the underlying assumption.

Posts: 919 | From: Montana | Registered: May 2005  |  IP: Logged

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While the IRC is prescriptive code the ICC commericial codes are not. You must go to other sources, weather bureau, local Army Corps of Engineering, ASCE etc. While using IRC table is good it does not solve all issues. Exp. (if once uses 12 inches the plbg will be a minimum of 18 inches but actual frost line is much less in many places so while footing may be 12 inches plumbing may only be 11 inches.

L Marks

Posts: 35 | From: Virginia, Hampton | Registered: Aug 2009  |  IP: Logged
globe trekker
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I performed a basic search on the 'net and came up with this link.

The USGS - Northern Prairie Wildlife Resource Center

HTH ! [Smile]

BTW, 4.5 ft. is correct! Also, maybe the 'peach' can confirm this data. She's a Dakota girl! [Smile]

[ 10-16-2009, 01:58 PM: Message edited by: globe trekker ]

Posts: 434 | Registered: Feb 2007  |  IP: Logged
Francis Vineyard
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Search for the NOAA.gov average freeze air temp 100 yr table, search HUD for frost depth table. Find the locality listed on the NOAA table read the 100 year number of freeze days. The HUD table shows something like <250 = 12" frost line. +500 = 18", +1000 = 24"
This is approximate owing to soil, elevation, water table, etc. Need to check with the AHJ

Someone with high speed internet can find this information really fast and post the links. If not I can post it Monday.

Posts: 203 | From: Charlottesville VA | Registered: Jan 2008  |  IP: Logged
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every jurisdiction will set their own frost line based on local conditions.. in Michigan, it's 42" .. even though on the lakeshore, it's sandy soil, which doesn't freeze as deep.

Thanks for the memories.. Frank (old blue eyes) Sinatra

Posts: 6160 | From: metro DC | Registered: Apr 2004  |  IP: Logged

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