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>Numbering System for <strong>Fire</strong> Rated AssembliesType of Protection: Direct Applied Protection600-699700-899Your next option is Direct Applied Protection. Direct Applied isnot fastened to but sprayed on such as mastic coating orSFRM. These design numbers fall between 600-899.