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MEANS OF EGRESS

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Means of Egress Components - Protective Exit Enclosures

The fire resistance rating - established by tests - is the time in hours that materials or assemblies can withstand a fire.

When an exit is protected by separation from other parts of the building, the separating construction shall meet the following requirements:
  • Three stories or less - one hour fire resistance
  • Four or more stories - two hour fire resistance
  • Openings protected by approved self-closing fire doors
  • Openings in exit enclosures shall be limited to those necessary for access to the enclosure from normally occupied spaces and for egress from the enclosure.

The protective exit enclosures requirement ensures an exit provides protection long enough in an emergency for escape.

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