Design Criteria

2019 Design CriteriaFinding Parcel Specific Design Criteria

You can find parcel specific design criteria like parcel elevation, ground snow load, climate zone and wind exposure on the My Neighborhood Interactive Map. Most residential structures in Nevada County west of Kingvale have a nominal wind speed of 95 mph for risk category II buildings and 85 mph for risk category I buildings. Areas above 4000’ elevation and east of Kingvale are in a special wind region per the California Building Code.

 Your design professional for the project must use local weather data to determine wind speed. Depending on the location of the building site, these areas typically have an ultimate wind speed between 100-120 mph. For seismic design category, see your design professional.

Determining the Parcel Specific Seismic Design Category

1. Look up the parcel in the Neighborhood Interactive Map. Note the latitude and Longitude which is located in the lower right have corner of the display.

2. Go to the ATC Hazards by Location and enter the location of the parcel. Note the value of S DS 

3. Use the table below to determine the parcel specific seismic design category.

SDS Table