Posted by DDH Staff on 6/18/2012 to
UL Listing (aka Underwriters Laboratories) "is an independent product safety certification organization. Established in 1894, the company has its headquarters in Northbrook, Illinois."" For door hardware, UL Listing is basically saying that it's been tested and meets safety requirements in case of fire. In other words, it will maintain it's integrity for 3 hours if there were a fire and after that it's probably destroyed. You will find that Commercial buildings usually require UL listed for 3 hour fire. So, with the UL agency it's comforting to know that they make sure and test the hardware for safety and also they make sure that the hardware will hold up long enough (3 hours) so that you can exit the building if you are inside when/if there is a fire. Each product is tested for fire resistance and performance, including swinging doors, glazing materials, frames, locks, closers, hinges and other door hardware products. Services UL includes:
- *ANSI/UL 10C, Positive pressure fire tests of door assemblies.
- *ANSI/UL 10B, Fire tests of Door Assemblies
- UL 1784, Air Leakage Tests of Door Assemblies
- NFPA 252, Standard Methods of Fire Tests of Door Assemblies
- UL Subject 63, Outilne of Investigation for Fire Door Frames
- CAN4-S104-M80, Standard Method for Fire Tests of Door Assemblies