My bad - to be clear, I was talking about the space below the double layer envelope on the bottom chords, as I misread the question. In the so-called plenum space between top and bottom chords, it's definitely a combustible concealed space.
Steve Leyton (Sent from my smartphone; please excuse typos and voice-to-text corruptions.) -------- Original message -------- From: Kevin Hall <[email protected]> Date: 1/16/24 10:21 AM (GMT-08:00) To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: Concealed Spaces Not Requiring Sprinkler Protection I think it is still combustible within the concealed space as the top and bottom chords are solid wood members... might still be able to omit sprinklers if one of the scenarios in the installation chapter applies. [https://www.dropbox.com/s/g4h8r7hdtsr6154/AFSA_L.png?raw=1] Kevin Hall, M.Eng., P.E., ET, CWBSP, PMSFPE Sr. Manager, Engineering and Technical Services American Fire Sprinkler Association p: 214-349-5971 w: firesprinkler.org<http://firesprinkler.org/> Treat Your Apprentices Like VIPs! AFSA’s Virtual Instruction Program (VIP) for Apprentices is training that comes straight from our expert instructors. They lead the way to ensure your men and women are trained, letting you focus on OJT. Click here<https://www.firesprinkler.org/sprinkler-apprentice-training/> to learn more and enroll. On Tue, Jan 16, 2024 at 1:15 PM Steve Leyton <[email protected]<mailto:[email protected]>> wrote: I believe that two layers of the Type X make the space between the presumably non-combustible ceiling and the sheetrock a non-combustible concealed space. Steve Leyton (Sent from my smartphone; please excuse typos and voice-to-text corruptions.) -------- Original message -------- From: "George Medina Jr." <[email protected]<mailto:[email protected]>> Date: 1/16/24 10:12 AM (GMT-08:00) To: Discussion List On Issues Relating To Automatic Fire Sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Concealed Spaces Not Requiring Sprinkler Protection There is a one hour floor assembly which consist of 22" Red-S joist (Wood Chords with Tube Bars) with 2 layers of type x gypsum board on channels below joist. Could it be considered limited combustible construction inside the bar joist? Or am I just grasping for straws, and it needs sprinklers. Thanks For any replies, George Medina Jr. _________________________________________________________ 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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