Which wall is rated for integrity to contain and stop fire spread?

• A. Partition Wall
• B. Fire Wall
• C. Veneer Wall
• D. Division Wall

Answer: (B)

The main idea here is fire resistance and containment. A wall that is designed to prevent the spread of fire between parts of a building must have a rated fire-resistance, including the ability to maintain integrity under fire conditions. A fire wall is specifically built to do this: it forms a continuous barrier that resists flame and hot gases from passing through joints and openings for a designated period, effectively containing the fire to the area of origin and keeping separate occupancies safe. It’s designed to stay intact and prevent flame travel even when exposed to high heat, which is what “integrity” in fire-rating refers to.

Interior partition walls, veneer walls, and division walls serve other purposes. Partition walls mainly divide spaces inside a building and are not required to provide a high level of fire containment. Veneer walls are exterior cladding or decorative layers and aren’t the primary fire-containment barriers between building sections. Division walls are interior separators that typically don’t meet the stringent continuity and fire-resistance requirements needed to stop fire spread.