Building Homes or Extensions/concrete slab footings

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Expert: Ted Barnhill (Principal, Design45 LLC) - 12/30/2007


Question
I am trying to define the footing itself ---Is the concrete slab and the sand or gravel under the slab considered part of footing

Answer
Bob, the sand or gravel is not part of the footing, but the slab may be.  In some southern locations, using a thickened slab foundation is common.  In this case, the edges of the slab are thickened (usually to 8" or more) with rebar, and the load bearing walls are built directly on the slab.

If you are in a northern climate and have foundation walls on footings, then the slab would not be considered part of the footing.

Hope this helps.  Feel free to follow up with more questions.  -Ted

(Sorry for the delayed response, I was out for the holidays.)

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Ted Barnhill (Principal, Design45 LLC)

Expertise

I can answer questions about architectural design, how to work with a designer, and best construction practices for most trades. I specialize in cold-climate design (I'm in Minnesota), older home renovation, and energy-efficient/sustainable design.

Experience

As a Principal of Design45, I design and detail new homes and remodels. I am formally trained in architecture, but have also been a contractor and have experience with many trades. I strive to provide beautiful, durable, and efficient homes for clients and communities of all types and budgets.

Education/Credentials
Undergraduate work at Princeton University (Mathematics), Master's work at the University of Minnesota (Architecture)

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