Design criteria for storage occupancies have changed substantially over the years from pipe schedules to the NFPA 231's to NFPA 13, 2016. Everyone talks about "grandfathering" old system designs, but no one can ever point out any specific codes, standards, or formal documents that give any solid guidance on this matter.
In our state, this situation varies by jurisdiction, but the opinions are all over the place and usually wind up at the classic "ask the AHJ". This is very time consuming and often times not very helpful since most of them enforce the newest NFPA editions when unless you can provide as-built documentation which we can't do 95% of the time for old buildings. We all know that it depends on the situation, but there has to be some level of formalized consistency out there to start with.
As a NICET certified Fire sprinkler designer, I have my own professional opinions on the matter based on my understanding of the intent of grandfathering and my own project experiences.
That said, can anyone point me to specific codes, standards, or formal documents that I can utilize to create a formalized opinion that can be submitted to local AHJ's for a more "standardized" understanding?
I'm pretty well versed in NFPA 13 so I'm really looking for IBC, NFPA 101, NFPA 1 references, but all feedback is appreciated.
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