We are working on a 20-story apartment building where the corridors are open with parapet walls on either side. These serve as an exit access corridor. The project is under NFPA 101.
In Chapter 7 of NFPA 101, the exist access corridor is supposed to have a minimum fire resistance rating of 1-hour. However, I can't seem to find any provision in the code regarding open corridors.
Will these corridors be required to have a fire resistance rating? What about the doors of the dwelling units?
I'm assuming if the corridor is not fire rated, then we wouldn't need opening protection through these partitions/walls.
Thanks in advance.
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9/7/2022 06:49:10 am
The corridors are open to an atrium, is that what you mean?
9/7/2022 07:48:58 am
9/7/2022 08:12:22 am
7.5.3 Exterior Ways of Exit Access
9/7/2022 08:26:21 am
Im in nj code. Full sprinkler building corridors are rated 30 minutes 20 minute fire door. Not sorinklered 1 hour. Open to atrium what ever attruim rating is. If open to atrium the atrium smoke control must be able to handle corridors also in there smoke test.
Ed James Ferraioli
9/7/2022 08:29:58 am
Look in IBC 2018 section 1020 I'm using nj edition it also in international IBC around same section
Todd E Wyatt
9/7/2022 08:30:25 am
NFPA 101 Life Safety Code is organized by general chapters (1-11, 43) and chapters (12-42) based on Occupancy Classifications (OC). Chapter 11 Special Structures and High-Rise Buildings includes requirements for “high-rise buildings” (HRB).
9/7/2022 08:34:37 am
Open Areas corridor/ Door / Walls NOT required to be Fire Rated Material . The Material selection shall be Flame spread index 0- 25 since high rise , whereas the material of cement and bricks comes under 0-25 FSI . Solid Block Bricks are automatically 2 Fire Rated .
9/7/2022 08:37:48 am
Are these open corridors open to an atrium? Or are they open to atmosphere? If open to atmosphere, I wouldn't think the fire rating requirement to apply.
9/7/2022 08:46:56 am
i cannot think of a single instance of what you described, regardless of atrium, etc.., where the penetrations would not be required to be rated.
9/7/2022 08:52:12 am
What I interpret in your question is that you really do not have exit corridors or exit access corridors as defined by NFPA 101. You have aisleways that lead to an exit (stairway). The walls of the dwelling units need to be rated.
9/8/2022 12:41:12 am
The separating walls between units must be fire rated 60 minutes. The passages if open and ventilated will not pose a problem provided you have the option to travel in two directions to a protected stair.
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