Tom,
How much weight do you think a piece of flex duct for residential is going to apply to the pipe? It looks like the bracket for the diffuser is only about a foot away and has 4 screws holding it. I don’t think that is the same as a piece of sheet metal duct being supported by sprinkler pipe. This is just my opinion. Not based on anything from NFPA 13D Cliff Whitfield, SET President Fire Design, Inc. 600 W. Bypass Hwy. 19E Suite 202 Burnsville, NC 28714 Ph: 828-284-4772 From: Sprinklerforum <[email protected]> On Behalf Of Tom Wellen via Sprinklerforum Sent: Friday, March 27, 2020 4:36 PM To: [email protected] Cc: Tom Wellen <[email protected]> Subject: NFPA 13D HVAC duct was found being supported by a CPVC pipe. The pipe is supported by holes through the wood joists. I thought NFPA 13D would prohibit sprinkler pipe from supporting other trades, but I don't seem to find it. It's spelled out in NFPA 13, 9.1.1.8 and 13R, 6.13. Did I miss it in NFPA 13D? Tom Wellen -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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