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frost line in pa is 42 inches

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Q: How deep do you have to dig for a mailbox post in Pa to get below frost line?
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How deep should you bury water pipe?

Below the frost line of your area. Your local building code will tell you what the requirements are.


How deep is the frost line in the City of Pittsburgh PA?

In western Pennsylvania the frost line falls at 36", when installing underground waterlines 42" is perfered.


How deep is the frostline in Naperville Illinois?

I saw a good chart of average frost penetration for Illinois. 10" to 20" for southern Illinois 15" to 30" for central Illinois (frost line for Peoria) 20" to 35" for northern Illinois


How deep should wires to an outdoor fountain be underground?

It's not a matter of how deep electrical wire should be buried. The wire should be protected by plastic or metal conduit and marked suitably above ground - buried utility. I am certain that you will be burying a water line to the fountain "below the frost line" for your area, so consider placing you electrical wires at the same depth.


Why is it necessary to step footings on a sloping site?

Footings, the concrete pads upon which foundation walls are built, must be located beneath the frost line in order to prevent a building from heaving when the ground freezes. If the site is sloped maintaining a constant elevation for the footings would either cause the footings to be above the frost line or significantly deeper than the frost line at one end of the building. Stepping the footings enables them to follow the slope of the site and remain below the frost line without going too deep under the ground. It allows the foundation wall heights to be minimized because the footings are kept as close to the surface as possible.