Building Codes & Requirements

Building Codes

The City of Centralia follows the following building codes (as amended in 18.04.010 of the Centralia Municipal Code):

• 2018 Edition of the National Electric Code
• 2018 International Fire Code as amended
• 2018 International Mechanical Code
• 2018 International Property Maintenance Code
• 2018 Uniform Plumbing Code
• 2018 Washington State Energy and Ventilation and Indoor Air Quality Codes
• The International Building Code, 2018 Edition, (as amended by Chapter 51-50 WAC, including the Appendix Chapters E and International Code Council (ICC)/American National Standards Institute (ANSI) A117.1-209, G, Flood Resistant Construction; I, Patio Covers; and J, Grading, and the International Residential Code, 2018 Edition, as amended by Chapter 51-51 WAC, including Appendix Chapters H, Patio Covers)

Design Criteria

• Air freezing index: 172
• Decay: Moderate to severe
• Frost line depth: 12 inches
• Ground snow load: 25 pounds per square foot
• Mean annual temp: 52 degrees
• Seismic design category: D1
• Subject to damage from weathering: Moderate
• Termite: Slight to moderate
• Wind speed: 85 miles per hour sustained, 3-second gust up to 110 miles per hour
• Winter design temp: 25 degrees