Which scenario indicates fire stopping is required at penetrations in a fire-rated wall?

• A. All penetrations are adequately fire-stopped.
• B. There are no penetrations in a fire-rated wall.
• C. There are penetrations without fire stopping in a fire-rated wall.
• D. The wall is non-fire-rated.

Answer: (C)

Fire stopping is needed because a rated wall relies on sealing openings to keep its fire resistance intact. When penetrations such as pipes or cables pass through a fire-rated wall, those gaps become potential routes for heat and flame. If those penetrations aren’t fire-stopped, the assembly’s ability to resist fire is compromised, allowing fire to bypass the wall’s rating. Therefore the scenario that signals a requirement for fire stopping is when there are penetrations in a fire-rated wall that have no fire-stopping in place. If all penetrations are already fire-stopped, the rating is preserved; if there are no penetrations, there’s nothing to stop; and if the wall isn’t fire-rated, fire stopping for that purpose isn’t dictated by a rating.