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1 hour rating

  1. R

    1 Hour UL Wall Assembly U340 - alternative

    My plans spec U340 which is a 6" wide 1 hour wall assembly that is framed using 2x6 and 2x4s and a single layer of 5/8" Type X drywall. Is anyone aware of a 6" wide wall assembly that uses metal track & metal studs instead? I know there are plenty of metal stud/track assemblies but most of...
  2. jar546

    One Hour Fire Wall, Do Not Penetrate

    First of all, I am not sure that a 1 hour rated "fire partition" should be called a fire wall, but anyway, this is just wrong regardless. I mean really? Right through the actual sign? LOL, Nice. First picture is what I am talking about, 2nd picture is what I found on the other side of the...
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