First I would have the ROC review the comments on 8.15.1.2.1 and
A.8.15.1.2.1 of NFPA 2007.
This even allows small quantities of "non-structural wood" in a concealed
non-combustible space, in addition to "Cabling" "Non-Metallic pipe" "---but
Should not typically be viewed as requiring sprinklers"
I know the military has their own rules!
Are you using UFC 3-600-01 of 17 April 2003 or 26 September 2006? 9/26/06
4-2.3.6 says sprinkler protection for 100% of building "except as permitted
by NFPA 13" No year given, use 2007 and it may be clear enough even for the
most anal ROC.
My gut call and I'd check the blazemaster listing info before anything else,
is if this is defined as a "Concealed Combustible Space" then no you can't
use the cpvc to protect it. But I know there are some specific CC-1 and CC-2
(TYCO) applications that have just been added, but I haven't read yet. Maybe
you can use the "Concealed Combustible space sprinklers" by TYCO or Viking,
I just don't know with your deflectors 18" down.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Steve Kowkabany" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, July 12, 2007 10:07 AM
Subject: Non Plenum-Rated Cable in Non-Combustible Ceiling
I have an odd situation on a military job I am doing right now where we are
adding sprinkler protection to 100,000 sqft of office space in a 3-story
building that has been built in three phases over the past 25 years of
non-combustible construction. We are planning on using CPVC piping for
this
application to hopefully make the retrofit less labor intensive. That's
all
pretty straightforward but the problem arises from the fact that the base
communication department has been steadily adding lots of non-plenum
rated
cable on top of the drop ceiling into a non-combustible return plenum
ceiling space above the first and second floors. The space above the
ceiling varies in depth from 4-5 feet with 16" deep fire proofed steel
joists spaced 3'-9" OC in some areas and 7'-6" OC in other parts. As a
result, the military has recognized the life safety risk of this and
allows
two options per the latest UFC-3-600-1, which are to either replace all of
the illegal cable over 5 years (impossible for us) or sprinkler above the
ceiling. So we are adding sprinklers above the ceiling. I'm a little
confused on a couple of things, and hope to get some guidance from anyone
who has run into similar situations:
1) Can you typically still assume the ceiling space is
non-combustible
and use CPVC piping if there is some non-plenum rated cabling in there?
2) What is the best approach for sprinklering a ceiling space this
deep
- standard K5.6 brass uprights spaced at a normal light hazard 225
sqft/head?
Thank you very much in advance for any thoughts on this,
Steve Kowkabany, P.E.
Fire Protection Engineer
Neptune Fire Protection Engineering LLC
216 Seagate Avenue Unit B
Neptune Beach, FL 32266
904-652-4200 Phone
904-212-0868 Fax
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
