Steve:
If I were the installing contractor I would definitely approach the problem the way you suggest. But as a sub-contracted designer, it is up to my client to choose the fight, not me. As much as I agree with you, my hands are tied. John P Crown FSD From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Steve Leyton Sent: Saturday, April 8, 2017 9:18 AM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Sprinklers over low partitions I would ask the owner of the project to help you acquire information about mini storage industry standard practices. The reason that the partitions are not full height is the same reason that hospital curtains have a drop with a between the track and the top of the panel - it's for fire sprinkler distribution! The design of this building and those partial height partitions is to allow the exact basis of design concept that you have undertaken for the fire sprinkler system. The first mini storage units I worked on as a designer had full height walls. When you have 5 by 5, 5 by 10 and 10 by 10 cells that each have a sprinkler, you can literally end up with 40 sprinklers in the design area. After doing a couple projects with ESFR-like demands, we worked with a local storage company to drop the walls and use heavy duty mesh on top of the partitions for security between individual units. This is now the norm and I would not take no for an answer in this situation. Get the owner of the project to help you in any way that they can. If, as owners often do, they try to pawn this off as your problem, then I would hit them for the additive change order you're entitled to for extra sprinklers and larger pipe size. That will get their attention and likely lead to some support for your argument. Steve -------- Original message -------- From: John Paulsen <j...@crwnfire.com <mailto:j...@crwnfire.com> > Date: 4/8/17 5:14 AM (GMT-05:00) To: sprinklerforum@lists.firesprinkler.org <mailto:sprinklerforum@lists.firesprinkler.org> Subject: Sprinklers over low partitions 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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