Ul Fire Resistance Directory 2017 (HOT | 2025)

The 2017 directory organized listings using a standardized alpha-numeric code that identifies the type of construction and protection used. First Letter Category Description Examples of Sub-categories Floor-Ceiling Designs Concrete, steel floor units, or precast units L Wood/Steel Joists Wood-framed floor/ceiling assemblies N Beam Designs Steel beams for floor or roof assemblies P, S Roof-Ceiling Designs Roof assemblies and supporting beams U, V, W Wall and Partition Designs Load-bearing and non-load-bearing walls X, Y Column Designs Structural steel columns with fire protection Key Applications in Construction Reroofing Fire Rated Construction | IIBEC

Assemblies are typically rated from 1 to 4 hours. ul fire resistance directory 2017

Why look at the 2017 directory today?

While UL (Underwriters Laboratories) updates their data continuously online, the 2017 printed volumes represented a specific snapshot in time for the industry—a time when the transition from physical manuals to digital integration was in full swing. The 2017 directory organized listings using a standardized