That is sheer laziness by HVAC sub. The extra weight is not calculated in the support formula in NFPA chapter 9 (2016 and earlier).
Thanks, Eric Hendrix Design Manager [cid:[email protected]] 124 Enterprise Drive | Madison, MS 39110 O: 601.898.9385 | C: 601-826-9071 [Image result for NICET email logo] [Image result for nfpa member logo] From: Sprinklerforum <[email protected]> On Behalf Of Tom Wellen via Sprinklerforum Sent: Friday, March 27, 2020 3:36 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 message is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged or confidential. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender by calling 859-255-9546 and delete the original message immediately. Thank you.
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