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Question concerning ASTM E119. Fire ratings.

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codeguy

codeguy

Structural
Joined
Mar 27, 2001
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Location
US
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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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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