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If you mean stepped footings this is used if

the structure is being built on a hill / slope.

I stay in Scotland some of terms in construction

can be different

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15y ago

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Can you list types of foundation in building?

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Frost line here in Maryland is 24 inches. Foundations are normally dug to 30" where the footings are poured.


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What is the minimum distance between lift footings and regular footings?

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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.


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Is perpendicular vertical?

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