Ul Fire Resistance Directory 2017 Pdf |link| Now

Published annually by Underwriters Laboratories (UL), this directory (often called the "Orange Book" or "Yellow Book" for its historic cover colors) is the definitive guide to fire-resistive assemblies . It contains thousands of tested and certified wall, floor, column, beam, and roof designs (designated as "U300," "U400," "D900," etc.).

If you are working with an older building code, verifying a legacy design, or performing forensic analysis on a structure built before 2018, you may need the 2017 UL Fire Resistance Directory . ul fire resistance directory 2017 pdf

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. Final Pro Tip: 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 If not, the design has been withdrawn or modified.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