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Building Safety Division 210 W. 6th Avenue, Kennewick, WA 99336 Phone: [PHONE REDACTED] Fax: [PHONE REDACTED] CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA Table R301.2(1) from 2021IRC and from 2021IBC General Design Criteria Roof and Ground Snow Load 20 psf, (drifting must be accounted for in IBC) Wind Speed Commercial 110 mph w/3 sec gusts or ASCEhazardtool.org Wind Speed Residential 110 mph w/3 sec gusts or ASCEhazardtool.org Topographical Effect No Seismic Design Category C Weathering Severe (see Ice Shield for roofs) Frost Line Depth 24 inches Termite Damage Slight to Moderate Decay Damage None Design Temperatures: Mean Annual Design Temperature 53.9 ْ F Winter 13 ْ F Summer 101 ْ F Summer Degree Range 30 ْ F (change) Yearly Degree Average 53.9 ْ F Average # of Clear Days 225 (occurs primarily April 1 to November 1) Air Freezing Index 801 Ice Shield Underlayment is REQUIRED because of occasional severe conditions, see R905.1.2. Other Design Information: Latitude 46 ْ North Elevation above sea level 350 feet Flood Hazard Information: FEMA 09/17/2024 REVISED