Which construction feature is essential for an exit corridor?

An exit corridor is a critical component of a building's egress system, designed to ensure safe evacuation in emergencies. One of the most vital requirements for an exit corridor is that it has walls of fire-resistive construction. This feature is essential because it helps to contain any fire or smoke, allowing occupants more time to evacuate the building safely. Fire-resistive walls significantly reduce the risk of flames spreading into the corridor, which is supposed to remain a safe pathway to exits during a fire emergency.

The use of fire-resistive materials is mandated by building codes to enhance the overall safety of the building. This ensures that people can utilize the exit corridor without immediate danger from fire hazards. In contrast, while natural light sources, openings to the outside, and decorative elements may enhance the aesthetics or comfort of a corridor, they do not provide the critical fire safety measures that are necessary in an exit corridor.