Climatic Data for Frost Protected Shallow Foundations
Cautionary Note when using Air Freezing Index values: Topographic variability, proximity to bodies of water, and urban heat effects should be considered when using these data. For those locations or if the planned construction site is not located nearby a station that has AFI data, using a combination of the AFI map and the most representative city(s) AFI value(s) is advisable.
AFI Maps (click on image for larger view)
This page was developed as a parternership among the National Climatic Data Center, National Association of Home Builders Research Center, and American Society of Civil Engineers.