I did find the 60” rule in FM Global data sheet 1-12. So, I guess my question is this:
If the product (tile) is UL-Listed (not just FM-Approved) and I meet the requirements of NFPA 13, am I technically REQUIRED to meet the FM Data sheet guidelines? Does anyone know if the testing (actual or theoretical) suggests that the sprinklers will fail if placed higher than 60” above these ceilings? Or is it just the case of “we haven’t done the testing to prove it will work at greater than 60 inches”? I’m just trying to understand why there would be an issue with having them higher. Also, where do you find the “light hazard only” rule? I found a white paper that mentioned that, but I haven’t found that in the code or listings so far. Thanks for your help. -Kyle M From: Sprinklerforum [mailto:[email protected]] On Behalf Of Timothy Goins Sent: Thursday, May 31, 2018 9:26 AM To: [email protected] Subject: [EXTERNAL] Re: Drop-Out Ceiling Tiles Light hazard only and yes 60" rule went into effect a few years ago. Thermo-Tile is the only band I know of. King and Company PO Box 10 Clarksville AR 72830 United States of America +1 (800) 643-9530 http://www.thermo-tile.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.thermo-2Dtile.com_&d=DwMFaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=w3H0bYFuZwg0xc8Bp8xZ9lZWIW0yiE28vGQX2uzaVWM&s=jRFH8sdzEgA0MBtLvMxRXhx27Pm-gs0STZ5ZJhp3ZB8&e=> And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh, and will give them an heart of flesh Eze 11:19 On May 31, 2018, at 11:00 AM, Kyle.Montgomery <[email protected]<mailto:[email protected]>> wrote: I’ve been searching around a little bit, but figured I would ask here, anyone have experience with installing these under sprinklers? I’m working with an architect whose client needs to install these polystyrene ceiling tiles that have been tested to drop-out in the case of a fire. They’re not doing it to try to save costs, apparently the spec for the product they assemble requires a “clean” environment which drives this. I’m having trouble finding good information about this. The NFPA requirements are pretty straightforward, but I’m seeing some conflicting issues in some of the other information I can find: 1. NFPA 13 does not permit QR heads above these ceilings (unless the ceiling is specifically listed for them), yet some of the other information I’ve found suggests that they can only be used in light hazard areas. 2. I’ve seen some information suggesting that the sprinklers need to be within 60” of these ceilings, but NFPA 13 makes no mention of that. Is that an actual requirement? Thanks guys. Any info helps. -Kyle M _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org<https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwMFaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=w3H0bYFuZwg0xc8Bp8xZ9lZWIW0yiE28vGQX2uzaVWM&s=-gAB2ui7vl8ASUrpS4mIvhxslgDpFJeza7U3gWBvsio&e=>
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