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Current Codes & Design Specifications

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Please click this link to access free commercial e-codes courtesy of ICC

Please click this link to access free residential e-codes courtesy of ICC



  • September 4, 2018, (2015 Edition) Virginia Uniform Statewide Building Code (USBC), administrative requirements & amendments. 
  • 2015 International Residential Code (IRC) For 1 & 2 family dwellings only (not more than 3 stories). Building, mechanical, plumbing & electrical requirements included within this book. 
  • 2015International Building Code (IBC) Code used for non-residential construction. Specific mechanical, plumbing & electrical requirements are not included in this book. 
  • 2015 International Plumbing Code (IPC) Code used for non-residential plumbing. 
  • 2015 International Mechanical Code (IMC) Code used for non-residential mechanical. 
  • 2014 National Electrical Code (NEC) Code includes commercial & residential requirements, however residential requirements are also included in 2015 IRC above. 
  • 2009 ICC/ANSI A 117.1. Accessibility requirements for commercial buildings, including multi-unit residential apartments and condominiums. Used with chapter 11 in IBC. 
  • 2015 International Fuel Gas Code. Fuel gas requirements for non-residential. 1 & 2 family dwelling requirements in chapter 24 of 2015 IRC. 
  • 2015 International Energy Conservation Code. Insulation, etc. for non-residential. 1 & 2 family dwelling requirements in chapter 11 of 2015 IRC. 
  • 2015 International Fire Prevention Code. Used where referenced by the International Building Code. 
  • 2015 International Existing Building Code.

Note: These codes also refer to a number of standards which becomes part of the Virginia adopted codes. (Example: NFPA 13 sprinkler system standard referenced often in the IBC). The standards required are listed in the appendix at back of each code above. VA USBC is available for download or sale at VA Department of Housing & Community Development, 501 N. 2nd Street, Richmond, VA or Other codes listed above are available for sale at The same building codes are used throughout Virginia.


  • Ground Snow Load: 43 psf
  • Roof Load: 30 psf
  • Wind Speed: One and Two Family Dwellings: 115 mph
    • All Others: In accordance with the International Building Code
  • Frost depth: 24” below finished grade
  • Seismic Design Class:  One and Two Family Dwellings: B
    • All Others: In accordance with the International Building Code
  • Weathering: Severe
  • Termites: Moderate/Heavy
  • Decay Region: Slight/Moderate
  • Winter Design Temp.: 16 degrees F


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