Lowest One Day Mean Temp - Canada
Lowest One Day Mean Temp - Canada
(OP)
In the National Building Code of Canada the lowest January temperatures are given for locations across Canada. These low temperatures are reported as having a 1% chance of being exceeded. Does anyone know how this would compare to a lowest one day mean temperature?





RE: Lowest One Day Mean Temp - Canada
I see online information about average lows, highs, etc., in different cities, I would think you could compare those to the LODMT and make a reasonable approximation for areas off the chart.
RE: Lowest One Day Mean Temp - Canada
RE: Lowest One Day Mean Temp - Canada
RE: Lowest One Day Mean Temp - Canada
RE: Lowest One Day Mean Temp - Canada
I have seen the chart in API 650 that shows the temperature ranges in Canada but it doesn't agree very well with the published data in the National Building Code. (The NBC tends to have a warmer low temps than API 650. Example, Edmonton Alberta NBC -29F VS API 650 -43F). I have always designed to the NBC as it is the national standard and Fig 4.2 hasn't been updated since 1952. This leaves me a bit open to criticism as I am not designing to the worst case standard.
RE: Lowest One Day Mean Temp - Canada
To the root of the question, the two sets of data are fundamentally different. Fundamental to the 1% statistic is the duration of the probability estimate. If it's 1% chance daily, then that means 3 days per year below the number is normal. If it's 1% chance of occurring over a 50 year lifetime for the building, then it's much less frequent.
David