My understanding has been that these specially listed sprinklers are
required for these flat, shallow combustible concealed spaces. I
believe it has been present since the 2002 edition. The wording changed
to be a bit more clear in the 2007 edition. The terms about depths of
top member required to channel heat was removed to make it more clear
the intent - at least that was my understanding of it.
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
On 3/20/2014 12:22 PM, Jeremy Frazier wrote:
Do you really need to have the standard spray uprights specifically listed
for the combustible concealed space? If you look at NFPA 13 2007 8.4.1.1 it
says "Upright and pendent spray sprinklers shall be permitted in all
occupancy hazard classifications and building construction types." I know
what section your referring to about specifically listed for combustible
concealed spaces ( I cannot for the life of me find it right now). I was
always under the interpretation that this specific section would allow you
to use specifically listed sprinkler heads if you couldn't comply with table
8.6.2.2.1 (a)
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Travis
Mack
Sent: Wednesday, March 19, 2014 3:04 PM
To: [email protected]
Subject: BIA and concealed spaces
We are looking at a project with the BIA (Bureau of Indian Affairs).
They require all bldgs over 2000 sq ft to be Ord Grp I as a minimum in ALL
areas. We have dealt with them in the past and there seems to be no
waivering on this issue. We had a contractor in the past install Tyco BB
heads and calc'd for 0.15 gpm. Tyco had written letters that calculating to
0.15 would be fine. But the data sheet for those heads says light hazard.
So, the BIA rejected and the attic had to be re-piped for SSU for
protection.
Now, the current project has concealed combustible spaces requiring the
specially listed heads for flat, shallow concealed combustible spaces - Tyco
CC, Viking COIN, etc.. However, we are going to have the problem that these
heads are listed for light hazard only. We can't go to SSU because NFPA 13
states that you must use specially listed heads for these concealed spaces.
We are awaiting a response from the BIA, but I am not expecting much help.
Have any of you ever run into this? If so, how did you address it? We
can't use the only heads listed for the area because they are only listed as
light hazard and the BIA requires all areas to be OH1 minimum. We can't use
SSU sprinklers because NFPA 13 prohibits their use in these spaces. It is a
true Catch 22.
--
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
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