The maximum allowable protection area for a sprinkler listed is in Table 22.214.171.124.1(a) of NFPA 13 (2016 Edition).
Section 126.96.36.199.1(1)(b) says to choose the larger of twice the distance to the wall, or the distance to the next sprinkler.
Do we use the protection areas in Table 188.8.131.52.1(a) when applying this code section, or do you use the maximum allowable protection area for a sprinkler that's listed in the manufacturer's data?
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1/17/2023 07:48:16 am
This is quick answer but a very deep subject, so I'll try to answer as best as I can.
1/17/2023 08:15:14 am
If the sprinkler is "listed" as a standard spray sprinkler it will have a maximum area a 225sqft. As that is the definition of such a sprinkler.
1/17/2023 10:01:46 am
Anthony said it well!
1/17/2023 08:32:09 am
Important to remember, that just because a standard coverage sprinkler is listed for 225-sq. ft coverage - or an Extended Coverage sprinkler is listed for 400 sq. ft. coverage doesn't mean you can space it that far.
1/17/2023 10:17:13 am
As a summary, use the manufacturer’s data if maximum coverage area is smaller than the one indicated in Table 184.108.40.206.1(a), as long as the final coverage area is fine with hydraulic calculations, as outlined by Jesse.
1/17/2023 10:29:23 am
Read your sprinkler cutsheets. Read your sprinkler cutsheets. Read your sprinkler cutsheets. Read your sprinkler cutsheets.
2/7/2023 02:40:40 am
So, in say a residential application (light hazard) or in other words 225sq ft max. But the head used is listed for 400sq ft given it has enough pressure and gpm. Assume this head has sufficient supply to spray the listed 400sqft. Do you follow NFPA (225sqft) regardless? Or does the listing supercede the light hazard code?
2/7/2023 02:42:03 am
Looking for the answer to this as well.
2/7/2023 07:52:44 am
Bill, what's the specific sprinkler model? Might be able to help by looking at the cutsheet.
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