Which organization is a listing agency for firestop systems?

Which organization is a listing agency for firestop systems?

• A. UL
• B. NFPA
• C. ASTM
• D. ISO

Answer: (A)

The main idea here is that a listing agency certifies and documents that a firestop system has been tested as a complete assembly and approved for specific configurations. UL is the recognized listing organization for firestop systems; they conduct the fire tests on the entire system—seals, sleeves, penetrants, framing, and any supporting components—and issue a listing that specifies exactly which configurations are approved and what fire-resistance rating they carry. This listing provides installation details and what must be used to maintain the rating, so contractors can install correctly and inspectors can verify compliance. The other groups—NFPA, ASTM, and ISO—are standards bodies. They create codes, standards, and test methods that guide design, performance criteria, and testing, but they do not issue the actual product listings for specific firestop assemblies.

The main idea here is that a listing agency certifies and documents that a firestop system has been tested as a complete assembly and approved for specific configurations. UL is the recognized listing organization for firestop systems; they conduct the fire tests on the entire system—seals, sleeves, penetrants, framing, and any supporting components—and issue a listing that specifies exactly which configurations are approved and what fire-resistance rating they carry. This listing provides installation details and what must be used to maintain the rating, so contractors can install correctly and inspectors can verify compliance.

The other groups—NFPA, ASTM, and ISO—are standards bodies. They create codes, standards, and test methods that guide design, performance criteria, and testing, but they do not issue the actual product listings for specific firestop assemblies.