County LogoClallam County, Washington

Wind, Snow and Seismic Zones for Clallam County


Area Wind Speed Exposure Average Snow Load (≤600' elev) * Seismic Design Category
IRC - Special Wind Region ASCE 7-10  IBC 2012 GROUND
Port Angeles 100 MPH 130 MPH C/(D**) 25 PSF D2
Diamond Point 100 MPH 130 MPH C/(D**) 25 PSF D2
Sequim 100 MPH 130 MPH C/(D**) 25 PSF D2
Beaver 110 MPH 140 MPH C 30 PSF D2
Pillar Point 110 MPH 140 MPH C/(D**) 25 PSF D2
Clallam Bay/Sekiu 110 MPH 140 MPH C/(D**) 25 PSF D2
Neah Bay 120 MPH 150 MPH C/(D**) 30 PSF D1
La Push 120 MPH 150 MPH C/(D**) 25 PSF D2
Forks 110 MPH 140 MPH C 30 PSF D2
Lake Dawn/Foothills 100 MPH 130 MPH C * D2

Soil bearing pressure: 1500# p.s.f.

Frost depth: 12" min.

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

** All areas within 600 feet of the marine shoreline are exposure "D", and/or a body of water 5000 feet (.95 of a mile) long, are exposure D (IBC 1609.4)

**All areas within 1500 feet of the marine shoreline are exposure "D", otherwise, exposure is "C" (IRC R301.2.1.4(4)).