TCFP Plans Examiner Practice Test

What is the minimum fire resistive rating required for exterior walls next to a flammable liquid storage area?

1. One hour

2. Two hours

3. Three hours

4. Four hours

The correct answer is: Two hours

The correct answer is two hours because building codes typically require exterior walls that are adjacent to flammable liquid storage areas to have a minimum fire-resistive rating to help prevent the spread of fire to adjacent structures and to protect the firefighters working in the area. A two-hour fire-resistive rating is recognized as sufficient to provide adequate protection against potential fire exposure and heat transfer from the flammable storage area, allowing the structure to maintain its integrity for a reasonable amount of time during a fire incident. Walls with this rating can effectively limit the spread of a fire, helping ensure the safety of both the building and the surrounding environment. A higher rating, such as three or four hours, may not be necessary for this specific application, while a one-hour rating may not provide adequate protection considering the hazards associated with flammable liquids.