I have a large spray booth that a customer is installing in a building that requires sprinklers. There is not enough water to protect the booth with sprinklers. Can I protect this spray booth to NFPA 33 with a dry chem system instead of sprinklers?
According to NFPA 33, the automatic fire protection system shall be permitted to be, and shall be installed in accordance with, any of the following: An automatic water sprinkler system (NFPA 13); an automatic foam water sprinkler system (NFPA 16); a carbon dioxide extinguishing system (NFPA 12); a dry chemical extinguishing system (NFPA 17); or A gaseous agent extinguishing system (NFPA 2001).
Thanks Milton. I guess my question should have been a little more specific to what I was thinking. I was wondering that since the actual building requires sprinklers, does that booth have to be protected with sprinklers to NFPA 13 or can we differ to NFPA 33 and then have those other options available to us.
Most building safety codes such as NFPA 101, NFPA 5000, and IBC permit alternative extinguishment systems approved by the AHJ that would not cause the building to be fully protected by an NFPA 13 automatic sprinkler systems. Examples are: a kitchen hood extinguishment system and a clean agent extinguishment systems in a computer room in a fully NFPA 13 sprinklered building. The AHJ's judgement to allow the alternative extinguishment should be the basis for its approval in the building based on the initial requirement of the NFPA 13 automatic sprinkler system. Was the requirement for an NFPA 13 system based on the building's occupancy, area and height, and construction type; or the exception, reduction, and alternative code provisions offered by the building safety codes?
Excerpt from 2018 NFPA 101:
Annex A guidance:
.....The second manner in which other systems are used as alternatives to fire sprinkler systems are in individual rooms or spaces of otherwise sprinklered occupancies. Here the authority having jurisdiction needs to use some judgment in the application of exceptions, reductions, and alternative code provisions that are offered for sprinklered occupancies. The permission to utilize such exceptions, reductions, and alternative code provisions far from the space with the other fire protection system should be granted. Closer to the space with the alternate system, exceptions, reductions, and alternate code provisions for sprinklers could be granted if the system was analyzed as discussed above and found to be equivalent to a fire sprinkler system.....
I think I may have found my answer back in NFPA # 13 - 22.4 - Looks as though in a building that has sprinklers, they want the booth to be protected with sprinklers and they really don't give another option. If this were a building without sprinklers, they would still prefer sprinklers but if not possible then you go to NFPA 33 and can protect with any system in there. This is about what I had thought but didn't find this section prior to posting my question. Just an FYI in our region, even if you put a gas system into a computer room in a building with sprinklers, the AHJ will still require us to put sprinklers in the room. I appreciate your input. Thanks for your help.
You can use either sprinklers or another approved fire protection system.
Just because the building has a fire sprinkler system, does not mean you have to use it.
And this is a booth, not a spray room?
Yes, 70ft x 24ft x 20ft high Spray Booth.
Yep Dry chemical or fire sprinkler or other approved system is good to go
Check the OSHA requirements at Spray booth requirements including automatic sprinkler systems, relationship to NFPA 33 requirements, and paint storage.…
You will see restrictions on the suppression systems allowed.
This forum allows for discourse on topics but should not be considered as your final answer for your application.
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