Well there it is.  

Craig L. Prahl, CET   
Fire Protection 
CH2MHILL
Lockwood Greene
1500 International Drive
Spartanburg, SCĀ  29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
CH2MHILL Extension  74102
[email protected]



-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Bill
Sent: Monday, February 07, 2011 1:31 PM
To: [email protected]
Subject: RE: lower density-larger design area versus higher 
density-smallerdesign area

Check out the section in the I.F.C. regarding Hazmat it was chapter 27 in
the 03 edition, paragraph 2704.5 Automatic sprinkler system. This says to
use O.H. gr.2 over 3000 sq. ft., go up the curve to 3000 sq. ft. and there
you are at .17 gpm. Every where else in the book regarding H type buildings
it just says O.H. is required. Why a sprinkler guy would be looking thru the
hazmat section for his design requirements I don't know, but it is there. It
is also in the newer version of the I.F.C.. Just did one of these buildings
that stored slightly caustic water and the architect and I stumbled across
this when we were looking for containment volume requirements. 

Bill Cunningham
Plumbco Inc. 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: Monday, February 07, 2011 5:49 AM
To: [email protected]
Subject: lower density-larger design area versus higher
density-smallerdesign area

I've seen comments like this several times and really wonder the
justification for it.  Case in point.  Specified .20 over 1500, no
combustibles or flammables, industrial application.  Suitable for the
Chemical Plants-Ordinary category out of 13.

Reviewer comes back with recommendation of .17 over 3,000.

Based on what has been written of most fires being controlled by fewer than
3 heads, what's the perceived advantage of the larger design area in an
environment of limited to no combustibles?  Building is "H" occupancy due to
toxicity hence requiring sprinklers throughout otherwise it would easily and
without argument be an F-2.

Craig L. Prahl, CET   
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