Load definitions
- dead load is the weight of all permanent structural and non-structural components of a building
- live load is the weight of snow, rain, wind and/or earthquakes and those weights due to occupancy
Climate zones map
Image
Design temperatures
| January 1% | -32 C |
|---|---|
| January 2.5% | -29 C |
| July 2.5% Drybulb | 29 C |
| July 2.5% Wetbulb | 18 C |
| degree days below 18 C | see climate zone map above |
| 15 min rain | 15 mm |
| one day rain, 1/50 | 54 mm |
| annual rain | 475 mm |
| moisture index | 0.64 |
| annual total precipitation | 650 mm |
| driving rain wind pressure (Pa) 1/5 | 80 |
Snow load 1/50
| rain load (Sr) (kPa) | 0.2 |
|---|---|
| ground snow load (Ss) (kPa) | 4.3 |
Hourly wind pressure
| probability 1/10 (kPa) | 0.29 |
|---|---|
| probability 1/50 (kPa) | 0.37 |
Seismic data
| Location | Smax for Unknown Site Class | Smax According to Site Class | ||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| Mackenzie | 0.314 | 0.0773 | 0.101 | 0.162 | 0.268 | 0.314 |
| McBride | 0.396 | 0116 | 0151 | 0.22 | 0.343 | 0.396 |
| McLeod Lake | 0.295 | 0.0707 | 0.092 | 0.15 | 0.251 | 0.295 |
| Prince George | 0.234 | 0.0497 | 0.0644 | 0.114 | 0.195 | 0.234" |
Radon
- soil gas rough in required
Required NAFS fenestration performance of windows and doors in Part 9 buildings
| DP | 960 |
|---|---|
| PG | 20 |
| water resistance | 150 |
Frost protection
- the bottom of footings must be 4 ft (1.22 m) below finish grade
From Building Bylaw No. 3239, 2021 Appendix C
Exceptions
- The climatic data values in the table above do not apply to any building or structure constructed in an area that the building official considers to be beyond the parameters listed above.
- For any of the exceptions listed above, the climatic design values shall be computed using the closest weather observations collected by the Atmospheric Environment Service, Environment Canada, to the site of the building or structure, which computation is intended to follow the methodology described in Division B, Appendix C – Climatic and Seismic Information for Building Design in British Columbia of the building code.
- For construction at the base of Powder King Ski resort and at Azouzetta Lake, the entire structure shall be designed, sealed and Letters of Assurance shall be provided by a Registered Professional, using a minimum ground snow load of 17.7 kPa or as calculated in section 2 above.