What is the primary purpose of a strip footing in a concrete foundation?

The primary purpose of a strip footing in a concrete foundation is to distribute the load of walls over a larger area. Strip footings are typically employed when supporting continuous walls, such as those found in residential buildings, to ensure that the weight of the wall is spread out evenly across the soil. This load distribution is crucial because if the foundation does not adequately spread the weight, it can lead to excessive settlement or even structural failure.

By utilizing a strip footing, the foundation effectively engages a larger area of soil, which helps minimize pressure on the ground beneath. This is especially important in areas with varying soil conditions, as it helps prevent issues related to uneven settling that could compromise the building's integrity over time.