Im a manager of Fire/Life Safety in NYC. I was recently asked a question about fire stairs. Whats the regulations/code as far as the required fire ratings of stair cases in office buildings? where can I find this info?
Looking like you are looking for the separation of exits requirements for an existing office building in terms of NFPA 101.
NFPA 101 is occupancy based, so looking at this section for existing business occupancies would be your first step.
Excerpts from 2012 NFPA 101:
Then look through Chapter 7 to see what applies to you situation:
Here is something about enclosure for exits staircases.
Also, interior staircases create floor openings. Therefore vertical protection is in accordance with 39.3.1.
Going to 8.6 you should find:
If you are talking an existing building, you would have to look at the code that was adopted, when the building was built.
Normally they are two or one hour rated.
Why the question, may help to answer the question.
OHHH I am not an engineer, so you can discount my reply if you want, and I cannot do math.
Click on this profile cdafd . I have no confidence. Seems foolish or stupid
Thank you Milton. That was very helpful in my search. Your knowledge on where to find the subject matter is greatly appreciated.
I just want to clarify something. Is the code refer "separation" as wall? and other thing is the staircase itself needs to be fire protected if wall, covering the stair, is fire protected for 2 hours?
The construction for the separation per Section 188.8.131.52.1 could be a wall, floor/ceiling, and roof/ceiling, depending on the configuration of the construction that separate the stairs. The construction of the stairs should be per Section 184.108.40.206.1 of NFPA 101.
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