Ul Fire Resistance Directory 2017 Pdf _top_ Official

If you find a 2017 design number online, look it up in the current UL Product iQ . If it is still active, UL will show it. If not, the design has been withdrawn or modified. Never build from an obsolete design.

the 2017 edition is useful, but treat it as a reference – not a construction specification – unless the design is still actively listed by UL today. ul fire resistance directory 2017 pdf

Because UL protects its intellectual property, you generally cannot download a free, full PDF of the 2017 directory. Your best options are: If you find a 2017 design number online,

The assembly lists materials in layers, typically from one side of the wall to the other. Never build from an obsolete design

In the 2017 UL directory, fire-resistance-rated assemblies are categorized using an alphanumeric system. The primary design prefixes you will encounter are: