ICC Commercial Building Inspector Practice Test

What is the minimum fire resistance rating for a fire barrier separating Group U and Group S-2 occupancy?

1. 1 hour

2. 2 hours

3. 3 hours

4. 4 hours

The correct answer is: 2 hours

The minimum fire resistance rating for a fire barrier separating Group U (utility and miscellaneous) and Group S-2 (moderate hazard storage) occupancies is indeed 2 hours. This requirement is established to ensure adequate protection between these types of uses, given their differing fire hazards and risks associated with the storage of materials. Group S-2 occupancies, which may involve storage of non-combustible or less hazardous items, still possess a level of risk that necessitates a robust separation from Group U occupancies, which can include a variety of utility functions that might not pose significant hazards. By enforcing a 2-hour fire resistance rating, the code aims to provide sufficient time for occupants to evacuate and to minimize the spread of fire during emergency situations. This level of fire resistance is based on considerations such as the potential fire load of the storage materials and the likelihood of fire occurring in utility spaces. The rating is therefore critical for ensuring safety and effective containment of possible fires, contributing to the overall life safety and property protection measures required in building design and construction.