Which term best describes a stairway enclosed by fire-resistive rated walls and self-closing doors?

Which term best describes a stairway enclosed by fire-resistive rated walls and self-closing doors?

• A. Smoke-proof enclosure
• B. Escape route
• C. Stairwell
• D. Enclosed exit

Answer: (A)

This question tests terminology for protected egress spaces. A stairway that is enclosed by fire-resistive rated walls and self-closing doors is designed to keep smoke out and provide a safe path for people to evacuate. The formal term for this protected stairway is a smoke-proof enclosure because it emphasizes both the enclosure and its ability to resist smoke intrusion. A stairwell, while it is the vertical shaft, does not by itself specify fire-resistive construction or self-closing doors. An escape route is a general term for the path occupants take to exit, not necessarily describing the protective construction. An enclosed exit isn’t a standard, precise term used to describe this specific protected stairway.

This question tests terminology for protected egress spaces. A stairway that is enclosed by fire-resistive rated walls and self-closing doors is designed to keep smoke out and provide a safe path for people to evacuate. The formal term for this protected stairway is a smoke-proof enclosure because it emphasizes both the enclosure and its ability to resist smoke intrusion.

A stairwell, while it is the vertical shaft, does not by itself specify fire-resistive construction or self-closing doors. An escape route is a general term for the path occupants take to exit, not necessarily describing the protective construction. An enclosed exit isn’t a standard, precise term used to describe this specific protected stairway.