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: Membrane ProtectionNext, you look at <strong>the</strong> protection you will000-099put over <strong>the</strong> structural element or groupof construction. The first option is 100-199Membrane Protection. This is protection200-299that is put on top of or mechanicallyfastened to <strong>the</strong> structural element much300-399399like drywall is fastened to steel studs.Examples are concealed grid or exposed400-499grid systems, gypsum, metal lath and or500-599599plaster. These numbers fall between 000and 599.