Standard Deep
Standard Deep

What is the standard building code depth for cement footing poured under new construction.?
I am building on a 12 x 24 foot addition and it was recommended I pour a 6 inch deep 3 foot wide footing under the outside walls and build a "pony wall" on top of it. Will that be deep enough or wide enough for code?
Footing sizes are determined by the load (building) on top of them, and the type of soil. The depth of the footing is determined by how deep your frost line is. The top of the footing is to be placed below the frost line. A 3 foot wide footing is not standard - 20 to 24 inches wide is standard. If 3 feet wide is recommended, it is probably due to shifting or expansive soil conditions at your location. Six inches thick is the minimum allowed by code, and is probably ok for a one story addition, but I don't know enough about your soil type to say yes or no.
Check with your local code enforcement officer / building inspector. You need good information for this - if you screw up the footing, everything built on top of it will also be screwed up.
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