Building Current Codes and Design Criteria

The City of Oak Harbor Building Division currently utilizes the following National Codes, Washington State Building Code Amendments, Oak Harbor Municipal Codes - Building and Construction, Additional Oak Harbor Regulations, and NFPA Standards.

National Codes

  • International Building Code
  • International Residential Code
  • International Fire Code
  • International Mechanical Code
  • International Fuel Gas Code
  • Uniform Plumbing Code
  • International Property Maintenance Code
  • National Electrical Code
  • Accessible and Usable Buildings and Facilities (ICC/ANSI 117.1)
  • International Existing Building Code

Washington State Amendments

  • WAC 51-50 IBC Amendments
  • WAC 51-51 IRC Amendments
  • WAC 51-52 IMC, IFGC, and NFGC Amendments
  • WAC 51-54 IFC Amendments
  • WAC 51-56 UPC Amendments
  • WAC 51-11R Washington State Energy Code, Residential Provisions
  • WAC 51-11C Washington State Energy Code, Commercial Provisions

For additional information on the Washington State Building Codes or to download the Washington State Amendments, click on this link to go to the Washington State Building Code Council website.

Oak Harbor Municipal Code - Building and Construction

  • 17.05 International Building Code
  • 17.06 International Residential Code
  • 17.10 International Mechanical Code
  • 17.12 Uniform Plumbing Code
  • 17.15 Washington State Energy Code, Residential Provisions
  • 17.16 Washington State Energy Code, Commercial Provisions
  • 17.22 2006 International Property Maintenance Code
  • 16.60 Manufactured Home Installation Requirements
  • 8.03 International Fire Code
  • 8.05 Fire protection Features in Buildings
  • 8.12 Fire Alarm Systems

Additional Oak Harbor Regulations

  • Oak Harbor Zoning Codes
  • Oak Harbor Public Works Construction Standards
  • Oak Harbor Design Guidelines
  • International Fire Code
  • Fire Sprinkler Regulations

NFPA Standards (Published by the National Fire Protection Association)

  • NFPA 13 Standard for the Installation of Sprinkler System
  • NFPA 54 National Fuel Gas Code
  • NFPA 58 Liquefied Petroleum Gas Code
  • NFPA 72 National Fire Alarm Code
  • NFPA 99 Standard for Healthcare Facilities
Additional IBC & IRC Design Information
Ground Snow Load
20 pounds per square foot (IBC Figure 1608.2)
Rain-On Snow Surcharge5 pounds per square foot added to flat roofs if a slope is <1/2" per foot. (IBC 1608.3.4 & ASCE 7-02 Section 7-10)
Wind Speed
115 MPH ultimate wind speed
Seismic Design CategoryD2
Rainfall2 inches per hour for roof drainage design.
Soil Bearing Capacity1,500 pounds per square foot, unless a Geo-Technical Report is provided. (IBC Table 1804.2 & IRC Table R401.4.1)
Geo-Technical ReportA soils report from a geo-technical engineer is required for commercial construction and may be required for residential construction on steep or difficult lots. (IBC 1802)
Frost Depth Line12 inches