How to set footing depths for sloped lots

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I getting ready to start on a room addition project where the existing house is on a slope.

From the front to back of the house there is a 48" drop in grade. Both the front and rear

yards are fairly flat.


The house has a raised foundation. When I built the foundation I set the footing depth at 24" deep.

The lower level shows the correct footing depth. The upper footing shows the footing at around 6'



I want the footings at the top and bottom of the slope to be 24" deep. How do I do that in Chief ?


Thank You,



House on Grade.plan

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