What design options do I have with a fire sprinkler design to address protection underneath a 45-degree pitched roof?
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11/3/2020 10:14:13 am
We may need more information on what design parameters you want some guidance. There are so many.
11/3/2020 10:46:27 am
Not doing a lot of storage design, can you explain the logic of a false ceiling? Is it a question of activation time?
11/3/2020 11:12:36 am
If you have a large peak roof with a slope >16.7%, you cannot protect it with NFPA (out of the scope of NFPA 13).
11/3/2020 01:02:57 pm
Thanks Franck. Is this an implied or explicit slope limit? I checked Ch. 1, 10, and 20 of 13-2019 and didn't see this 16.7% stated. I do doubt my reading comprehension sometimes.
11/3/2020 03:08:38 pm
NFPA 13 - 2019 Edition
11/3/2020 03:23:47 pm
Thank you for the reference. To conclude, as that section is for storage occupancies, NPFA 13 would still be applicable if the slope is greater than 2 in 12 in a non-storage occupancy.
11/3/2020 03:23:09 pm
It is one of the few "dark" areas of NFPA 13 where there is no proposed solution, either than just "out of the scope of NFPA 13".
2/16/2023 05:32:38 am
Hello Franck, could you please tell me in which part / chapter of NFPA13 you see that with saw tooth ceiling we can have storage , and use just a ceiling solution , adapting the remote area ?
11/3/2020 10:29:39 am
There is some information still needed. You say you have a 12:12 pitch on your roof. What is the structure? Combustible or non-combustible? What is the distance from one eave to the other eave across the roof? Dry system or wet? If dry add an additional 30% onto your remote area. And due to the pitch of the roof, you will have an additional 30% area increase to your remote area.
6/8/2022 08:15:23 am
You are not required to space sprinklers based on the slope of the ceiling where it is greater than 2:12, only to align the deflector:
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