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?
Comment:
I haven't been able to find any clarification in the Commentary books.
Existing Interpretations and/or Declaratory Statements Related to this request
Input Received:
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.
I agree with Linda. 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. I don't really see this as being general vs. specific issue.
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.
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.