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>Type “X” Core• “eXtra” fire resistance• The basic components added that give Type “X” it’ssuperior fire resistant core are gypsum andfiberglass.