When I look at the added flow requirements in §22.4.2.4 I note that this application is only for "area/density" design criteria, and I am skeptical to refer this to an ESFR system, which is certainly not "area/density."
Ken Wagoner, SET
Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235
Phone: (760) 745-6181
Visit the website
Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235
Phone: (760) 745-6181
Visit the website
On 2/8/2024 11:30 AM, Ben Young wrote:
Sorry, i meant 23.4.4.2.4 not 23.4.4.2.3
Benjamin Young
On Thu, Feb 8, 2024 at 12:23 PM Ben Young <derblitzkrie...@gmail.com> wrote:
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 <mattgri...@gmail.com> 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
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