7.3.9.1.(2)

Intent 1:

To limit the probability that inadequate air movement through vestibules will go unnoticed, which could lead to the smoke control system not operating as originally intended in a fire situation, which could lead to the buildup of smoke on floor areas or in exit stair shafts, which could lead to:

• delays or inefficiencies in emergency suppression operations, which could lead to the spread of fire, which could lead to harm to persons, including emergency responders, and
• delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.