John,
Unfortunately....you are dealing with an AHJ that is subjectively making a
decision based on his personal ideas relative to Fire Sprinkler spacing and
operation. Further...he doesn't realize that the low partitions have no effect
upon the Fire Sprinkler operation or discharge characteristics.
Your challenge is to educate this person as to the fact that the NFPA Technical
Committee takes all factors into account in developing the codes. I would
suggest using some of the data from NFPA 13 on obstructions to educate this
person as to how the discharge cone develops and that there is no more
likelihood of a fire developing in the center of a space than there is along
one of these low partitions.
Good luck!
John W. FarabeeVP Fire Sprinkler DivisionAtlantic Realty and Building,
LLCJupiter, Fl561-707-5150Florida License No.FPC16-000106
On Saturday, April 8, 2017 5:14 AM, John Paulsen <[email protected]> wrote:
<!--#yiv1723190551 _filtered #yiv1723190551 {font-family:"Cambria
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1.0in 1.0in 1.0in;}#yiv1723190551 div.yiv1723190551WordSection1 {}-->We are in
the final phases of designing a self-storage facility (Ord Haz, Grp II) that
has upright, quick response sprinklers with the deflectors at least 18” above
the top of the individual storage unit partitions. In some cases where the
units are 5’x5’ or 5’x10’ we have located the sprinklers directly over the top
of the low partition. Our design concept is that the sprinkler will throw
evenly to each side of the partition and cover the space on either side. This
prevents us from have to “stagger” the sprinklers with arm-overs to prevent
spacing closer than 6’ apart. We have also provided the manufacturer’s
sprinkler spray pattern information to support our design concept. Now the
local plan reviewer is telling us that he will not accept this sprinkler
arrangement and that each unit has to have sprinkler(s) over them. This is the
second project that we have done in this jurisdiction and we ran into a similar
issue with the first one that we solved with the sprinkler over the partition
arrangement. Now he will not accept this solution, but he doesn’t site any code
or handbook reference that we are violating. Is our design concept contrary to
the provisions of NFPA-13? A review of NFPA-13 only specifically deals with
sprinkler spacing over low partitions in light hazard occupancies, not OH II,
so I have no code guidance. Comments would be greatly appreciated. John
Paulsen – SETCrown Fire System Design6282 Seeds Rd.Grove City, OH 43123P –
614-782-2438F – 614-782-2374C – 614-348-8206
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