HomeMy WebLinkAboutClimatic Design Data Building Bylaw 6925-2012
City of Maple Ridge Design Data
Data per latest edition of BCBC with elevation factoring
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City of Maple Ridge Revised 2016-07-25
11995 Haney Place, Maple Ridge, BC V2X 6A9 Tel: 604-467-7311 Fax: 604-467-7461
Inspection Requests: inspectionrequests@mapleridge.ca Web Site: www.mapleridge.ca Inquiries at: permits@mapleridge.ca
The purpose of this document is to advise that the climatic design data for the construction of buildings and
structures or parts thereof, in the City of Maple Ridge, shall be those listed in Division B, Appendix C of the
BC Building Code current edition. The following is an excerpt from the City of Maple Ridge building bylaw for
your convenience.
Building Bylaw 6925 - 2012
25. Design Data
25.1 The following climatic design data shall be utilized for the design of Buildings in the
Municipality:
25.1.1 January 2 1/2 percent Design Temperature: - 9oC
25.1.2 January 1 percent Design Temperature: -11oC
25.1.3 July 2 1/2 percent Design Drybulb Temperature: 30oC
25.1.4 July 2 1/2 percent Design Wetbulb Temperature: 20oC
25.1.5 Annual Total Degree-days below 18oC: 2840
25.1.6 Maximum Fifteen-minute rainfall: 10mm
25.1.7 Maximum One-day rainfall 1/50: 134mm
25.1.8 Annual Rain: 1800mm
25.1.9 Annual Total Precipitation: 1950mm
25.1.10 Moisture Index: 1.86
25.1.11 Driving Rain Wind Pressure Pa, 1/5: 160 Pa
25.1.12 Ground snow load (kPa):
0-45 metres elevation: 1/50 SS = 2.4 kPa (design weight based on snow depth)
SR = 0.2 kPa (design weight added for rain)
Cb = 0.45 for entire roofs not exceeding 4.3 m / 0.55 m
for all other roofs
Above 45 Metres: 0.008 x (Site elev. in Metres) + 2.4 kPa = SS
0.001 x (Site elev. in Metres) + 0.2 kPa = SR
CbSS + SR = specified snow load
25.1.13 Hourly Wind Pressures: Probability 1/10 = 0.34kPa
Probability 1/50 = 0.44kPa
25.1.14 Seismic Data: Sa (0.2) = 0.97
Sa (0.5) = 0.65
Sa (1.0) = 0.32
Sa (2.0) = 0.17
PGA = 0.48
"This information is provided for convenience only and is not a substitution of applicable City Bylaws, Provincial or Federal Codes or
Laws. You must satisfy yourself that any existing or proposed construction or other works complies with such Bylaws, Codes or other
laws."