In the 2016 edition, check out sections 23.4.4.2.3 and 23.4.4.2.5 Use those to add phantom flow based on the minimum flow from 12 sprinklers.
It's a variation on the theme but it should satisfy the ahj. Benjamin Young On Thu, Feb 8, 2024 at 11:55 AM Matt Grise <[email protected]> wrote: > We are looking at an auto repair facility that has a very small tire > storage room (apx 300sf). The tire storage space is open on one side to the > misc parts storage area (short-shelf OH2). Our thought was to protect the > tire storage space with a small ESFR system that extends 15' into the misc > parts storage area. The other 3 sides of the tire storage room are CMU and > extend to the deck. > > Even with the 15' extension into the lesser hazard area, there are only 6 > ESFR sprinklers needed. (2 heads on 3 lines) = 540sf. > > Based on the annex commentary in NFPA 13 2016 A11.1.2, our plan was to > calc the 6 esfr heads (the full higher-hazard area plus 15' = 540sf) along > with 960sf at .2gpm/sf to round out the larger of the two operating areas. > > > We received some pushback because there is no ESFR design criteria that > only uses 6 heads, so the plan reviewer was concerned that we were not > following the 12-head design for an ESFR system. > > There was a suggestion that we should pretend there were 12 heads and calc > a 12 head area (even though 6 would never be installed).I figured that > since we were calculating ALL of the ESFR heads in the building, that would > be ok. > > Has anyone seen anything like this before? Any thoughts? > > Thanks! > > Matt Grise > > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected]
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