What are the foundation wall footings dimensions required for structures that are 3 stories tall in high wind zones (120-130 mph)?

For structures that are three stories tall located in high wind zones, specifically in areas with wind speeds ranging from 120 to 130 mph, the foundation wall footings need to be designed to handle the increased structural loads created by wind forces. The correct dimensions for the footings are critical to ensure stability and safety.

Opting for a footing width of 10 inches and a depth of 24 inches serves several purposes. The wider footing (10 inches) provides a greater bearing area against the soil, which helps distribute the load more effectively, reducing the risk of settlement or tipping. The depth of 24 inches helps to ensure that the footing reaches below the frost line (where applicable) and provides adequate support against lateral loads from wind pressure.

This dimension is consistent with structural engineering principles and is aligned with local building codes that account for factors such as soil type and load-bearing capacity in high-wind zones. The careful consideration of both the width and depth of the footing is pivotal in achieving the necessary stability for taller structures, where the effects of wind are more pronounced.