ICC Commercial Building Inspector Practice Test

How long must a corridor door in a Group I-2 occupancy have a fire resistance rating?

1. 30 minutes

2. 45 minutes

3. 60 minutes

4. 90 minutes

The correct answer is: 45 minutes

In a Group I-2 occupancy, which typically includes facilities such as hospitals and nursing homes, the fire protection requirements are critical for ensuring the safety of occupants, particularly those who may have limited mobility. The correct fire resistance rating for corridor doors in these types of facilities is 45 minutes. This rating is designed to provide sufficient time for occupants to evacuate safely or for the building’s fire protection features to control the spread of smoke and flames in the event of a fire. The 45-minute rating is established in code requirements to support an effective fire separation strategy that aligns with the need to protect individuals in care facilities who may be more vulnerable in emergencies. Doors with this fire rating serve to compartmentalize areas, allowing for better control of smoke and heat transfer, which is crucial in maintaining safe egress paths. While other options may reflect common fire resistance ratings for various types of doors in different occupancy classifications, they do not specifically align with the required rating for Group I-2 corridor doors, emphasizing the tailored nature of building codes to address specific occupancy risks and safety measures. The 45-minute rating satisfies both the regulatory requirements and the essential safety needs of the building’s occupants.