UL Fire Ratings
UL Fire Ratings
(OP)
I am on a fire protection project and was wondering what the correlation between the fire ratings were. There seems to be a lot of fire ratings for different things and it seems confusing. For example, why are UL 790 ratings listed as classes (Class A, B, C, etc.. ) for roofing materials, while wall materials have a fire rating in hours. It there a way to correlate a class rating to an hour rating?





RE: UL Fire Ratings