What fire resistance rating is required for fire barrier assemblies in Group A occupancies?

In Group A occupancies, which include assembly facilities such as theaters, auditoriums, and similar types of venues, the fire resistance rating required for fire barrier assemblies is indeed 2 hours. This requirement is essential for ensuring occupant safety and helping to control the spread of fire within the building, especially given the larger crowds and potential hazards associated with these spaces. A 2-hour rating allows for sufficient time for evacuation and for fire-fighting efforts to commence, minimizing the risk of significant harm.

The codes and standards governing fire safety, such as the International Building Code (IBC), typically stipulate these ratings to provide a structured approach to fire protection. The higher fire resistance rating also reflects the increased risk associated with the occupancy type, rather than requiring lower ratings that might be sufficient for less hazardous configurations.