3.4.4.4.(2)

Objective

OS1 Fire Safety

Attribution

Intent

Intent 1:

To supersede the requirements of Subsections 3.1.8., 3.1.9. and 3.2.8., and require scissors stairs and other contiguous exit stairways to be separated from each other by smoke-tight fire separations.

This is to limit the probability that fire will spread from one exit to another exit, which could lead to:

  • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
  • delays or ineffectiveness in fire emergency response operations, which could lead to:
    • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, including emergency responders, and
    • the spread of fire to other parts of the building, which could lead to harm to persons.

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