To provide added support for a foundation in unstable soil, a(n) ____ may be used in place of the foundation.

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A grade beam is a reinforced concrete beam that spans between foundation pads to provide added support to the structure above. It can be used in place of a traditional foundation in unstable soil conditions as it distributes the weight of the structure over a wider area, reducing the stress on the soil. Anchor bolts are used to secure the structure to the foundation or grade beam, nested joists are used for flooring systems, and stem walls are typically used in conjunction with a foundation.

To Provide Added Support for a Foundation in Unstable Soil