Mandan Building & Design Criteria

City of Mandan Codes 

The following codes are currently enforced by the City of Mandan:

  • 2021 International Building Code (IBC)
  • 2021 International Residential Code (IRC)
  • 2021 International Fire Code (IFC)
  • 2021 International Fuel Gas Code (IFC)
  • 2021 International Mechanical Code (IMC)
  • 2021 International Energy Conservation Code (IECC)
  • 2021 International Existing Building Code (IEBC)
  • ICC ANSI A117.1 2017 (All new bathrooms will need to meet these requirements)
  • National Electrical Code and the North Dakota State Wiring Standards adopted by the North Dakota State Electrical Board
  • Uniform Plumbing Code and the North Dakota State Plumbing Standards adopted by the North Dakota State Plumbing Board

 

IRC Climatic and Geographic Design Criteria

  • Ground snow load: 40 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: Current FIRM adopted 2007.
  • Air Freezing Index: 4000
  • Mean Annual Temp: 42 degrees (F)

 

IRC Energy Efficiency Building Thermal Envelope Requirements

  • Climate Zone: 6A
  • Fenestration U-factor: 0.30 Maximum
  • Skylight U-Factor: 0.55 Maximum
  • Ceiling R-Value: 49 Minimum
  • Wood Frame Wall R-Value: 21 or 13+5 Minimum
  • Mass Wall R-Value: 15/20 Minimum
  • Basement Wall R-Value: 10/13 Minimum
  • Slab R-Value and Depth: 10, 4ft Minimum
  • Crawl Space Wall R-Value: 10/13 Minimum