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Question concerning ASTM E119. Fire ratings.

thread177-5833

Question concerning ASTM E119. Fire ratings.

Question concerning ASTM E119. Fire ratings.

(OP)
I am a code official and having difficulty verifiing fire ratings of various assmeblies. My most important question is, what is the fire rating for a typical 2 x 4 studded wall w/ R-11 insulation and 5/8" fire rock? Any help is appreciated.
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RE: Question concerning ASTM E119. Fire ratings.

Assuming non-combustible studs, I'm fairly sure this would have a 1-hour rating.  I can't find my reference at the moment.  You might check the UL Fire Resistance Manual if you have one or if library nearby.

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