County LogoClallam County, Washington

Wind, Snow and Seismic Zones for Clallam County


Area Wind Speed

Wind Exposure

Average Snow Load (≤600' elev) Seismic Design Category
ASCE 7-16  2018 IBC, 2018 IRC GROUND
Diamond Point 110 MPH C/(D**) 25 PSF D2
Sequim 110 MPH C/(D**) 25 PSF D2
Port Angeles (Blue Mtn. - Joyce / Lake Crescent) 110 MPH C/(D**) 25 PSF D, E
Lake Dawn/Foothills 110 MPH C * D2
Pillar Point 120 MPH C/(D**) 25 PSF D2
Beaver 120 MPH C 30 PSF D2
Clallam Bay/Sekiu 120 MPH C/(D**) 25 PSF D2
Forks 120 MPH C 30 PSF D2
La Push 130 MPH C/(D**) 25 PSF D2
Neah Bay 130 MPH C/(D**) 30 PSF D2

Soil bearing pressure: 1500 PSF

Frost depth: 12 inch minimum

* For elevations greater than 600 ft above sea level, snow load = elevation x 0.04.
Example: 800 ft elevation = (800 x 0.04 = 32 PSF snow load).

Roof snow load shall not be reduced below 30 PSF in Beaver, Forks or Neah Bay and not below 25 PSF for the remainder of Clallam County.

** All areas within 600 feet of the marine shoreline are exposure "D", and/or a body of water 5000 feet (.95 of a mile) across, are exposure D.