Which element serves as the boundary for subdividing a floor area into fire-resistant compartments?

• A. Doors or Curtains
• B. Partitions or Walls
• C. Carpet or Drapes
• D. Lumber or Doorways

Answer: (B)

Fire compartments are created when spaces are separated by barriers that resist fire for a specified time. Those barriers define the boundary of each compartment and are typically walls or partitions. Openings in these barriers, such as doors or curtains, may exist to connect spaces, but they are openings within the boundary, not the boundary itself. Carpet or drapes are furnishings and don’t form a fire-resistant boundary, while lumber or doorways describe materials or openings rather than the boundary. Therefore, the boundary that subdivides a floor area into fire-resistant compartments is the walls or partitions.