frost depth additonal depth?
frost depth additonal depth?
(OP)
I don't normally have projects in the north.
is there anything I should add to this frost depth?
say most cities in Arkansas, it's only 10" below of footing right?
is there anything I should add to this frost depth?
say most cities in Arkansas, it's only 10" below of footing right?






RE: frost depth additonal depth?
Also, whatever the recommended value I doubt if anyone would object if you rounded it up to the nearest half foot. I.e., 10" becomes 12", etc.
RE: frost depth additonal depth?
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: frost depth additonal depth?
I wouldn't use this map at all. The general concept is there (colder and deeper in the north) but the numbers are just wrong. Perhaps there's a Safety Factor missing.
I work in the Ohio and Pennsylvania areas, and as a reference, southern Ohio (Cincinnati area) is about 30", and Cleveland is 42". In Pennsylvania, Erie is 4' while the southern edge of the western part of the state is 3'. Many owners in this area are nervous about using anything other than 48".
What you could do is contact the local jurisdiction, or failing that the State, and find out what the officially mandated minimum is. Or talk to a local Geotech.
RE: frost depth additonal depth?
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: frost depth additonal depth?
It shows 5" where I am, but the local jurisdictions call for 12 to 18" minimum, and it does not address local geographic anomalies such as 14,000 foot mountains and mountain ranges!
Call the local building department as previously mentioned.
Mike McCann, PE, SE (WA)
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
What?
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: frost depth additonal depth?
Mike McCann, PE, SE (WA)
RE: frost depth additonal depth?
RE: frost depth additonal depth?
Combined with equation 2 from here: ftp://ftp.ncdc.noaa.gov/pub/data/normals/1981-2010...
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: frost depth additonal depth?
RE: frost depth additonal depth?
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: frost depth additonal depth?
RE: frost depth additonal depth?
http://www.pavementinteractive.org/article/calcula...
THe link was added to show the variables... pretty complex.
In Lindsay, Ontario the depth of frost penetration is typically 4'... in a parking lot (cleared of snow), ice was found at 7' below grade.
In Winnipeg, Manitoba the depth of frost penetration is typically 6'... in a parking lot, ice was found at 13' below grade.
Dik
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: frost depth additonal depth?
RE: frost depth additonal depth?