Building and Design Criteria

City of Bismarck Codes

The following codes are currently enforced by the City of Bismarck:
  • 2012 International Building Code
  • 2012 International Residential Code 
  • 2012 International Fire Code
  • 2012 International Fuel Gas Code
  • 2012 International Mechanical Code
  • 2009 ND State Plumbing Code w/Amendments (including Appendix H)
  • 2014 National Electric Code/Wire Standards of ND

2015 Code Adoption

Effective July 1, 2017 2015 International Building Code will be adopted. All permits prior to this date will be applicable to the previous code cyle. 

IRC Climatic and Geographic Design Criteria Information

Ground snow load: 35 psf 

Wind Design speed: 115 mph 
Wind Design topographic effects: NO 
Wind Design special wind region: NO 
Wind Design wind-borne debris zone: NO 
Seismic Design Criteria: Zone A 
Subject to Damage From weathering: Severe 
Subject to Damage from frost depth: 4 feet 
Subject to Damage from termite: NO 
Winter Design Temp: -19 
Ice Barrier Underlayment Required: YES 
Flood Hazards: First FIRM adopted in 1985, current/revised FIRM adopted 2014. 
Air Freezing Index: 4000 
Mean Annual Temp: 42 degrees (F)

IRC Energy Efficiency Building Thermal Envelope Requirements 

Climate Zone: 6A
Fenestration U-factor: 0.35
Skylight U-Factor: 0.60
Ceiling R-Value: 49
Wood Frame Wall R-Value: 20 or 13+5
Mass Wall R-Value: 15/19
Floor R-Value: 30
Basement Wall R-Value: 10/13
Slab R-Value and Depth: 10, 4ft
Crawl Space Wall R-Value: 10/13