From: Sean Lockyer
Sent: Wednesday, January 09, 2013 5:11 PM
To: '[email protected]'
Subject: RE: Pre-.05 density heads: What heads can be used as a replacement ?
The sprinklers in question are the old Central, Low Flow, Optima Pendents which
are 3.0 K-factor and are installed in a standard 3-story apartment building
(13R, 1997/1999 Edition). If the spacing was limited to 12' x 12' or even 14' x
14' then I think a standard 4.9 at those same spacing requirements will suffice
but I have never seen a residential system installed in an apartment installed
with sprinklers spaced at less than 16' x 16'. Keep in mind, this is from the
late 90's and is located in the Central Florida area. During those days most
sprinkler companies used those 3.0K low flow heads and had ¾" lines, 1" mains,
and 1-1/4" risers while spacing those babies out at least 16' x 16' and at 20'
x 20' at least half the time. (Trust me, I know-I was one of them, lol!)
For the single head, single room areas I am not worried but in the multi-head
compartments I am worried as all get out. I know that Tyco issued a
"compatibility chart" that listed the current LFII as a "principal replacement"
for the old Optima series but that is a bit of a vague stretch to assume that
settles things....
NFPA really needs to address this-either in a future standard of 13R or at
least a white paper or a formal interpretation....
Sean Lockyer
Project Designer 4617 Parkbreeze
Court
Cell 386-279-1197 Orlando,
Florida 32808
[email protected] <mailto:[email protected]>
Phone: 407-816-9101
www.AITLifeSafety.com <http://www.aitlifesafety.com/>
Fax: 407-816-9104
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