My best guess on why 5' max higher than they would be at the drop out
level-- the higher the ceiling the longer the activation time no
matter what fire growth rate is full scale tested. In this case there
is an additional delay due to the sprinklers not being "sensitive" to
the fire growth rate from the point of ignition. They might have
established pass/fail criteria for the delay (and subsequent increase
in heat release rate at activation. They might have tested 4,5,and 6
feet above and got delay times that 'passed', but the 6 foot 'failed'.
Brad
Quoting Timothy Goins <[email protected]>:
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
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]> 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
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