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ul u336

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    11" wide firewall -what size rated door jamb?

    i have a ul u336 area separation firewall with a width of 11-1/2" and trying to find a detail for the door jamb. should the jamb be the fill 11"+ wide or can it be a standard rated jamb fire caulked into the framed opening with gyp. board returns and the 2" liner panel tight to the inside of the...
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