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>Finish i Rating vs. <strong>Fire</strong> Rating• <strong>Fire</strong> Ratings pertain to a total ASSEMBLY.• Finish Rating is <strong>the</strong> time required to obtain anaverage temperature rise of 250 degrees (or asingle point rise of 325 degrees) between <strong>the</strong>material being tested (gypsum board) and <strong>the</strong>substrate being protected (i.e. plywood).