What is the difference between a fire barrier and a fire partition?

• A. Fire barriers are continuous, typically spanning from floor to floor with a minimum fire-resistance rating.
• B. Fire barriers are not used to separate spaces.
• C. Fire partitions must always span multiple stories.
• D. Fire partitions require a fire-resistance rating higher than fire barriers.

Answer: (A)

The main idea is how far the wall assembly runs and how much fire resistance it must have. Fire barriers are continuous, extending from floor to floor (through multiple levels) and carrying a minimum fire-resistance rating. They’re meant to compartmentalize sections of the building and stop fire from moving vertically and horizontally across floors, such as around stair enclosures or between occupancies.

Fire partitions, by contrast, do not have to span multiple stories. They subdivide spaces on a single floor and typically have a lower fire-resistance requirement. They run from the floor up to the ceiling (and don’t have to reach other floors), serving to limit fire spread within a single level rather than through the building.

That’s why describing fire barriers as continuous, floor-to-floor assemblies with a minimum rating best captures the difference.