Vince, no, not exactly yet. If you are calcing a certain number of
heads, the shape factor is not applicable. If you are calcing an area
per FM, the shape factor is tied to ceiling slope, as I posted. This
is not 'word of mouth', but my understanding from what I found in FM's
data sheet on hydraulics of fire protection systems (i think 3.0). You
are welcome nontheless :). Tomorrow, when i have a more pedictable
internet connection, i will reply off forum to explain what i mean by
"(you know what i mean?)".
Quoting Vince Sabolik <vi...@wtfp.net>:
Hey Brad Thanks!
So FM did ditch the 1.4? I don't know any other underwriter that
requires 1.4, so if
no one barks here I think I'll stick with the 1.2.
Thanks again for today's 'lesson', Brad
At 04:07 PM 6/19/2012, you wrote:
Vince,
Re FM's 1.4, as far as I can tell, for ceiling slopes of 1/12 and less, 1.2,
and if greater, 1.4. For number of heads, last one I did was 6, 3 on two
lines, so 1.2 and 1.4 was N/A. FM was the only AHJ though so there was no
question. If FM is not the only AHJ in your case be careful! (know what I
mean?)
-----Original Message-----
From: Vince Sabolik [mailto:vi...@wtfp.net]
Sent: Tuesday, June 19, 2012 2:38 PM
To: sprinklerforum@firesprinkler.org
Subject: BIG BOY HEADS
Regarding those "big boy" heads with large K's that are specified by the
number of operating heads. Is the shape factor different than the usual 1.2
or 1.4? Did I read here that FM scrapped their 1.4? Help,help & thanks!
Vince
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Vince Sabolik, West Tech Fire Protection, Inc.
11351 Pearl Road / Strongsville, Ohio 44136 440 238-4800
Fax 440 238-4876
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