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 - SET Crown Fire System Design 6282 Seeds Rd. Grove City, OH 43123 P - 614-782-2438 F - 614-782-2374 C - 614-348-8206
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