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Fire Tape Question

 
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Old 08-13-2008, 07:10 PM   #1
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Fire Tape Question


I have a job that we are bidding that the specs state that the layer beneath the final layer to be fire taped? I have never come across something like this. We typically stagger the joints and call it good. Can anyone enlighten me to why they would require this? Thanks
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Old 08-13-2008, 07:17 PM   #2
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Re: Fire Tape Question


Yes, it's a requirement of the UL Orange Book to achieve the rating of certain rated assemblies.

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Old 08-14-2008, 10:05 AM   #3
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Re: Fire Tape Question


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Originally Posted by mdshunk View Post
Yes, it's a requirement of the UL Orange Book to achieve the rating of certain rated assemblies.
I have looked through the UL directory and cannot find any wording that suggests the base layers need to be fire taped. Please share your knowledge of an UL assembly or wording from the "Orange Book" that states the fact. Thanks
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Old 08-14-2008, 11:31 AM   #4
 
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Re: Fire Tape Question


I have never heard of firetaping the base layer either, does not make sense if the joints are staggered.
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Old 08-14-2008, 02:54 PM   #5
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Re: Fire Tape Question


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Originally Posted by mdshunk View Post
Yes, it's a requirement of the UL Orange Book to achieve the rating of certain rated assemblies.

Like the wise man said, different fire ratings. maybe it's a 4 hr wall and that is a way to keep from adding a 3rd layer of rock.

Or maybe it is a new kid in the Archs office

Either way it sounds like more profit to me.
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Old 08-14-2008, 08:20 PM   #6
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Re: Fire Tape Question


Yeah, you rock the wall and tape the joints with one coat and tape. Doesn't have to look pretty, just sealed. Then rock the next layer and tape as usual. There's usually an inspection of the first layer taped before the second layer can be added. This is typically done to slow the movement of fire from one occupied space to another like in apartment complex or mall stores. Sounds like a 2 hour rated wall.

http://www.nationalgypsum.com/resour...ound/goldh.pdf

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