WHAT ARE THE WIND LOAD REQUIREMENTS FOR LEWIS COUNTY?

Basic Wind Speed is 85 miles per hour with the exposure determined by the following definitions:

• Exposure B has terrain with buildings, forest, or surface irregularities, covering at least 20 percent of the ground level area extending one mile or more from the site.
•  Exposure C has terrain that is flat and generally open, extending one-half mile or more from the site in any full quadrant.