Current Adopted Building Codes
- 2021 International Building Code and Amendments
- 2021 International Energy Conservation Code and Amendments
- 2021 International Mechanical Code and Amendments
- 2021 International Plumbing Code and Amendments
- 2021 International Residential Code and Amendments
- 2021 Fire Code and Amendments
- 2021 International Fuel and Gas Code
- 2023 National Electrical Code
- 2017 Accessibility Code
Design Criteria
Roof Snow Load – 30psf
115 ULT – Exposure C
- Seismic Design Category: IRC: B
- Seismic Design Category: IBC: Per chapter 16
| Condition | Value |
|---|---|
| Heating Degree Days | 6343 |
| Winter Design Temperature | -3 °F |
| Summer Dry Bulb | 90 °F |
| Summer Wet Bulb | 59 °F |
| Air Freezing Index | 867 |
| Mean Annual Temperature | 48.1 °F |
| Minimum Frost Depth for Foundations | 36 inches |
IBC table 1607.1
- Live load 40psf (30psf in sleeping areas) see table R301.5
- Dead Load 10psf
- Duration of Load 1.00
- Deflection L/360
Live Load 30psf (attic=”10psf” no storage, 20psf limited storage)
Dead Load 10psf Minimum or as required based on type of roofing material and ceiling material, see table R301.6
Duration of Load 1.15 (Snow)
Deflection L/180 Rafters (no ceiling); L/240 (ceiling); L /240 Beams, see table R301.7
RESIDENTIAL EXTERIOR DECKS: 40psf Live Load (LL), see table R301.5
COMMERCIAL EXTERIOR DECKS: see table 1607.1