What does "smoke containment" refer to in the context of firestopping?

Smoke containment refers to the measures taken to limit the escape of smoke from the area where a fire originates to unprotected areas during a fire event. This concept is critical for ensuring that smoke, which can be toxic and harmful, does not spread to different parts of a building and poses a threat to life safety and proper evacuation. Effective smoke containment helps to maintain tenable conditions in escape routes, allowing occupants to exit safely while also aiding in the effectiveness of firefighting efforts by keeping smoke localized.

This is an essential aspect of firestop systems, which are designed not only to prevent the spread of flames but also to control smoke movement through gaps and openings in fire-rated barriers. Proper installation and maintenance of firestop materials specifically target the management of both fire and smoke, thus supporting overall building safety protocols.