What wind speed should I use for my project?

The answer varies with location and type of building.  There are several ‘risk categories’ associated with a location that determine what wind speed to use.  A building that’s a risk category I for example has a lower wind speed requirement than a more important risk category II or III building.  We explain risk categories here.

Please be sure to verify with your local Building Department as these values can be under- or over-conservative depending on use.

Use this resource: http://windspeed.atcouncil.org/  to see by map.