The Canadian Code is silent on the impact of an unheated or cold-storage occupancy on the roof snow load calculation. In the US codes, there is a Ct factor that varies from 1.0 for a heated structure to 1.2 for a cold-storage application. This directly ratchets up the roof snow load when calculated off of a base ground snow load. I can not find any indication in the Canadian code or it's commentaries in regard to this phenomena in Canada. It would seem there should be some allowance for this unless the basic 0.80 conversion factor already includes it, but I can't find any references.
I would appreciate anyone's thoughts on how they have handled this condition in the past.
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