Adopted Building Codes
2006 International Building Code (IBC)
2006 International Residential Code (IRC)
2006 International Mechanical Code (IMC)
2021 International Plumbing Code (IPC)
2021 International Fuel Gas Code (IFGC)
2006 International Energy Conservation Code (IECC)
2006 International Fire Code (IFC)
Adopted amendments to these codes are available on the County website: www.rbc.us
Roof Snow Load by Elevation (for reference only)
| ELEVATION | MINIMUM ROOF SNOW LOAD | MINIMUM FROST DEPTH |
| Below 6,000 ft | 40 psf | 36 inches |
| 6,000 to 6,500 ft | 50 psf | 42 inches |
| 6,501 to 7,000 ft | 60 psf | 42 inches |
| 7,001 to 7,500 ft | 70 psf | 42 inches |
| 7,501 to 8,000 ft | 80 psf | 48 inches |
| 8,001 to 9,000 ft | 90 psf | 48 inches |
| above 9,000 ft | 115 psf | 48 inches |
Actual roof snow load will be determined by the RBC Building Official
Climate Zone-6
Wind design 90 mph (3 sec) Exposure B or C
Seismic Design Category - TBD per site
Weathering probability for concrete - Severe
Ice barrier underlayment required
Floodplain (Section 245 RBC Land Use Resolution)