The architect proposed to hang perforated metal mesh tiles 8" below the slab above. Multiple vertical fabric baffles are attached to these metal mesh tiles extending up to 14" below the ceiling. Which ceiling criteria should I apply here? It does not meet the requirements of the Open Grid ceiling (NFPA 13-2016, Section 8.15.14). It has only 8" above the ceiling. Also, it does not fall under the criteria of cloud ceiling. I have proposed uprights above the ceiling to protect the space above the ceiling & the fabric ceiling baffles.
Proposed pendent sprinklers below the ceiling at 12" below the ceiling. I've requested the architect to restrict the depth of fabric baffles to 12" below the ceiling to avoid obstructions. I have doubts on the activation of the pendents located below the ceiling since the ceiling tiles are perforated. Any suggestions on this proposed protection? Should the space between the fabric baffles be considered as ceiling pockets? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
6 Comments
Anthony
6/12/2024 07:58:50 am
I don't think the fabric would create a 'non combustible ceiling space" I think it would make a combustible concealed space.
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Greg
6/12/2024 08:29:42 am
Agree with your thought on classification of the ceiling space. The arrangement of the red vertical tiles would appear to have them in very close proximity to each other in select locations. Even if the fabric is a Class A finish material, the proximity could allow for direct flame contact fabric-to-fabric and possibly overwhelm inherent fire resistivity. I'm thinking of a fire initiating event within a lighting fixture, for example. Conversation with the architect may be appropriate about the distance between fabrics and potential fire dynamics of proximate fabrics.
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Glenn Berger
6/12/2024 08:11:29 am
Agree with the pendents to be located below the metal mesh ceilings. You might be able to eliminate the sprinklers in the 8 inches above the metal mesh ceilings. More details on the entire building space would be required for a more specific response.
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Dan Wilder
6/12/2024 09:12:54 am
This needs to be broken down into sections. First, what is the % open of the perforated panels?
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Jack G
6/12/2024 08:38:08 pm
A couple of things comes to mind.
Reply
Greg
6/13/2024 08:30:38 am
Good point on the 135F and 200 F call out.
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