Commercial Building Inspector B2General Administration, Permits, and PlansHard
A commercial building inspector is reviewing plans for a new 8-story Group R-1 hotel. The building has an atrium. What is the minimum required vertical separation of the openings in the atrium enclosure between floors?
- A30 feet
- B10 feet
- C0 feet (no separation required if sprinklered)
- D20 feet
Show answer & explanationAnswer & explanation
Correct answer: B. 10 feet
According to IBC Section 404.6, the atrium enclosure openings shall be separated by a minimum of 10 feet vertically. This separation helps prevent the rapid vertical spread of smoke and fire through the atrium.
Why the other options are wrong
- A. 30 feet is not a standard minimum vertical separation for atrium openings.
- C. Even with sprinklers, vertical separation is typically required for atrium openings to control smoke and fire spread.
- D. 20 feet is not a standard minimum vertical separation for atrium openings.
Atrium Opening Vertical Separation
The International Building Code (IBC) requires a minimum vertical separation between openings in an atrium enclosure. This separation is crucial for compartmentalizing fire and smoke, preventing rapid spread between floors through the large vertical space of the atrium.
- Required between openings in atrium enclosure.
- Prevents vertical fire/smoke spread.
- Minimum 10 feet vertical separation (IBC 404.6).
Memory trick: The 'Atrium Gap Guard' keeps fire from leaping floors.