See NFPA 2022 9.5.2.1.1 (2) It states that the coverage area is defined by determining the perpendicular distance to the branch lines on either side, then using the larger of twice the distance to calculate the coverage area. So the 14' dimension is the one that must be used. Sarah FifiOasis Fire Protection
On Thursday, March 21, 2024 at 09:44:27 PM CDT, Fpdcdesign <fpdcdes...@gmail.com> wrote: I am working on a project which is a retail store being renovated for a new tenant. The previous retail tenant had been in the space for at least 20 years. The existing sprinklers below the ceiling (to remain) are spaced at 10 ft in one direction and alternate 10 ft and 14 ft (10-14-10-14…) in the other. I made the comment that the sprinkler spacing exceeds the 130 max requirement of NFPA 13 and it needs to be modified. The architect (and his “value engineer”) decided that 1/2 the distance on one side is 7 ft and on the other side is 5 ft, which equals 12, times 10 ft in the other direction equals 120 sqft and all is fine. The Fire Marshal is kind of buys into it because he is new and his department blew it 20 years ago. Unfortunately 13 doesn’t address their being to possibility of different spacings between sprinklers (such as ‘maximum’ distance between sprinklers when determining S and L). Any thoughts, ideas or references I am missing as I walk into this battle? Todd G Williams, PEFire Protection Design/ConsultingStonington, CT860-535-2080 (ofc)860-554-7054 (fax)860-608-4559 (cell) _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org
