Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
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<strong>Understanding</strong> <strong>UL</strong>ASSEMBLY U411• Wall & Partition:U, V or W*• 400 – 499• Metal Stud, Gypsum Board, Lath&/or Plaster• Assembly U411