Building Code
Adoption of 2024 Codes
Ordinance 1061 adopted the 2024 Editions of
- The International Building Code
- The International Fuel Gas Code
- The International Mechanical Code
- The International Plumbing Code
- The International Residential Code
- The International Existing Building Code
- The International Fire Code
The 2023 Edition of The National Electrical Code.
Refer to Title 15 of the Douglas Municipal Code for amendments to these codes.
Climatic and Geographic Design Criteria
Buildings, dwellings, townhouses, structures, and portions thereof, including patio covers and accessory buildings, shall be designed and constructed in accordance with the following climatic and geographic design criteria:
- Ground Snow Load,
include design for snow drifting:
- For Risk Category I = 27 pounds per square foot.
- For Risk Category II = 37 pounds per square foot.
- For Risk Category III = 44 pounds per square foot.
- For Risk Category IV = 53 pounds per square foot.
- Ground Snow Load,
for one-and two-family dwellings = 27 pounds per square foot.
- Basic Design Wind Speed, 3-second gust:
- For Risk Category I = 103 miles per hour.
- For Risk Category II = 109 miles per hour.
- For Risk Category III = 116 miles per hour.
- For Risk Category IV = 120 miles per hour.
Note tornado-prone region requirements for Risk Category III and IV. - Ultimate Design Wind Speed for one-and two-family dwellings = 110 miles per hour.
- Wind Exposure Category = C.
- Seismic Design Category for Risk Category I through III = B.
- Seismic Design Category for Risk Category IV = C.
- Seismic Design Category for one- and two-family dwellings = B.
- Weathering = Severe.
- Frost Line Depth = 42 inches, minimum, finish grade to bottom of footings.
- Termite Protection = Slight to Moderate.
- Heating Design Temperature = -13°F.
- Heating Degree Days = 7,343.
- Cooling Degree Days = 2,082.
- Cooling Design Temperature = 89°F, dry bulb.0
- Cooling Design Temperature = 58°F, wet bulb.
- Mean Annual Temperature = 45.5°F.
- Air-Freezing Index = 1,500°F-days.
- Flood Hazard = FIRM Community Number 560013 1394 D.
- Annual Precipitation = 14 inches.
- Rainfall Intensity = 2 inches for one hour, 100-year return period.
- Hail Exposure = Slight.
- Climate Zone/Moisture Designation = 6B.
- Longitude = 105°23’. Adjust to specific site.
- Latitude = 42°46’. Adjust to specific site.
- Elevation above Sea Level = 4,832 feet. Adjust to specific site.