Now that is interesting…
The wording of the code is that tie-in drains are required, but the commentary says they should be avoided if possible. The 2022 edition (16.10.5.3.6) has the same wording in both the code and the commentary. David L. Miller, P.E. Engineered Fire Protection, LLC 11920 Richcroft Avenue Baton Rouge, Louisiana 70814 225-273-5040 From: [email protected] <[email protected]> Sent: Monday, March 13, 2023 6:41 PM To: [email protected] Subject: [Sprinklerforum] Re: Combining dry system drains 2016 edition NFPA 13 8.16.2.5.3.6 ….. commentary from handbook…..Tie-in drains on multiple adjacent branch lines should be avoided, if possible, because the use of tie-in drains, in effect, creates a gridded system Jeff Normand From: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > Sent: Monday, March 13, 2023 6:37 PM To: 'Discussion list on issues relating to automatic fire sprinklers' <[email protected] <mailto:[email protected]> > Subject: [Sprinklerforum] Re: Combining dry system drains NFPA 13 (2016 edition) 8.16.2.5.3.6 Tie-in drains shall be provided for multiple adjacent trapped branch pipes and shall be only 1 in. (25 mm). Tie-in drain lines shall be pitched a minimum of 1⁄2 in. per 10 ft (4 mm/m). David L. Miller, P.E. Engineered Fire Protection, LLC 11920 Richcroft Avenue Baton Rouge, Louisiana 70814 225-273-5040 -----Original Message----- From: Sean Lockyer <[email protected] <mailto:[email protected]> > Sent: Monday, March 13, 2023 6:31 PM To: [email protected] <mailto:[email protected]> Subject: [Sprinklerforum] Combining dry system drains Can dry system drains (I.E. - Drum drips) be combined or interconnected ? Sean Lockyer Project Designer AITLifeSafety _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected] <mailto:[email protected]> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected] <mailto:[email protected]>
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