I'm with you, but "yes you will be permitted" is not the same as "yes you
will".  
But enough.  I'm confident I understand the intent, regardless of the
wording.

Ed Kramer
Lawrence, KS

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Bob
Sent: Wednesday, April 02, 2014 1:38 PM
To: [email protected]
Subject: RE: Steeply pitched roof

Though, "shall" means "yes you will" and "should" means "if it helps you".
You can find these definitions in the 12th printing of bobisims if you need
to reference them.

Thank You,

Bob Knight, CET III
208-318-3057
www.Firebyknight.com



-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Ed
Kramer
Sent: Wednesday, April 02, 2014 12:23 PM
To: [email protected]
Subject: RE: Steeply pitched roof

Juan, I believe that's the intent, but the wording ". . . shall be permitted
. ." makes it sound optional to me, or at the very least, confusing.

Ed Kramer

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Juan
Munguia
Sent: Wednesday, April 02, 2014 1:17 PM
To: [email protected]
Subject: Re: Steeply pitched roof

NFPA 13 (2013) section 8.6.4.1.3.1 states "Unless the requirements of
8.6.4.1.3.2 or 8.6.4.1.3.3 are met, sprinklers under or near the peak of a
roof or ceiling shall have deflectors located not more than 36 in. (914 mm)
vertically down from the peak as indicated in Figure 8.6.4.1.3.1(a) and
Figure 8.6.4.1.3.1(b)."

Per section 8.6.4.1.3.1, the maximum vertical distance below the peak is 36
inches unless the requirements  of sections 8.6.4.1.3.2 or 8.6.4.1.3.3 are
met.

My opinion is section 8.6.4.1.3.3 requires a minimum horizontal clearance of
24 inches, and therefore allows the deflector to be located at a vertical
distance greater than 36 inches down from the peak.

Juan Munguia




On Wed, Apr 2, 2014 at 10:28 AM, Ed Kramer <[email protected]> wrote:

> NFPA 13 (2013) section 8.6.4.1.3.3 says "Under a steeply pitched 
> surface, the distance from the peak to the deflectors shall be 
> permitted to be increased to maintain a horizontal clearance of not 
> less than 24" form other structural members as indicated in Figure 
> 8.6.4.1.3.3."
>
>
>
> So, does this mean lowering the sprinkler in order to get the 24" 
> clearance is optional?  Am I allowed to install the sprinkler very 
> high in the peak (let's say 12" down from peak with only 8" horizontal 
> distance from sprinkler to roof)?
>
>
>
> Ed Kramer
>
> Lawrence, KS
>
>
>
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
>
> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl
> er.org
>



--
Juan Munguia
Thorpe Design Inc.
P 925.634.5758
C 209-380-0599
F 925.634.5975
E [email protected]
W www.thorpedesign.com
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