What constitutes an "accessible" vertical shaft?
We have a vertical shaft in a high-rise building, without a door at the bottom, but with windows.
Is this "accessible" as dictated by NFPA 13?
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2/1/2022 07:07:28 am
If you can stand in it and it has a door. then it is accessible.
2/1/2022 08:10:15 am
If you are using NFPA 13, it is probably because you want sprinklers in your vertical shaft.
2/1/2022 08:16:27 am
The issue with access is that it gives the occupants the ability to enter the space and store items that would create a fuel load in the space. If all you have are fixed windows from the exterior, this would be an non-issue. In that case, I would not consider it accessible.
2/1/2022 08:18:00 am
You may want to look at the requirements in IBC that each window, if not fire rated glass, May require window sprinklers on both sides to prevent “ leaping of a fire between floors”.
2/1/2022 08:22:57 am
Doesn't sound like an accessible space per se, but rather concealed space. The issue may be the glass and whether or not it is fire rated. Fire rated glass is crazy expensive and most of the GCs in my area balk at it, which leaves us having to design window protection.
2/1/2022 08:35:41 am
When a Code or Standard (e.g. 2022 NFPA 13) does not include a definition (e.g. accessible), the referenced dictionary shall be the resource : Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003. Its definition of "accessible" includes the following : capable of being reached; capable of being used or seen.
2/1/2022 08:48:38 am
This is not an NFPA 13 item, but an NFPA 101 requirement. If using a window assembly, need to ensure the fire rating is met.
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