I'm having a hard time pinning down what Type II construction is. I think BCI defined it as no different than Type I, other than the fire-resistance ratings (3hr & 2hr vs 1hr & 0hr). But in other sources, I've seen Type II be described as stone and masonry construction, or as entirely non-combustible material other than the roof. Could these just be different ways of describing the same thing? Or are some incorrect?
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