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Interpretation #8466

Original Request

  • Requested By: Mario Soto
  • Requester E-Mail: soto@miamidade.gov
  • Code Version: 2017
  • Code: BUILDING
  • Code Description:
  • Chapter: Chapter 7-Fire and Smoke protection features
  • Section: 712.1.9
  • Topic: Two story openings

  • Question: Is condition #2 in section 712.1.9 prohibiting a floor opening between two stories from penetrating a horizontal assembly that separates fire areas in conflict with condition #1 in section 1019.3 allowing an unprotected opening between two stories for an unenclosed exit access stair?

Answer:

No, Not in conflict, you have to maintain the appropriate ratings and penetrations of the "Fire Area" separation. Section 1019.3 gives allowances for exit access stairways and ramps. Chapter 7 is the more specific code criteria where you have specific rating protection requirements. Especially between fire areas.
On 10/26/2020 at 12:03 PM

Commentary:

Item 2 of Section 712.1.9 would prevent the open stair between two stories if the two stories were separate fire areas or the floor assembly served as a smoke barrier or part of the separation of smoke compartments. If the two stories made up a single fire area, there would be no problem with the open exit stair provided all other conditions were met.