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NFPA 101 Life Safety Code Practice Test

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What term refers to a continuous membrane used to subdivide a concealed space to resist the passage of smoke and heat?
Correct Answer:
Draft Stop
Explanation:
The principle here is limiting how smoke and heat move through hidden spaces by using a continuous barrier. This is called a draft stop—the uninterrupted membrane placed within concealed spaces (like ceilings, under floors, or attic/ceiling cavities) to subdivide them and slow the spread of fire and smoke. A fire door, while it helps maintain a fire barrier, is a door installed in a barrier and isn’t the continuous membrane that subdivides concealed spaces. A court is an open or courtyard area in a building, not a barrier in concealed spaces. A dwelling unit is a living space and not a barrier used to block smoke travel.

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