I would see if the AHJ would consider calcing (2) at each of (11)
levels = 22 + 1 at the peak = 23. This approximates .1/1950. The 2
would be on the 'remote' side from the vertical supply riser.
I envision what is referred to as a Spill Plume fire for calculating
smoke exhaust rates in high rise atriums like you see in hotels.
Brad.
Quoting David Bitton <[email protected]>:
There is a landing at each of 11 levels, the stairs are in the
center of the tower, with some additional floor space at each
landing. The whole thing is of combustible construction so we have
sprinklers at each level. It is more an 11 storey tower than a
continuous shaft. Also, it is not heated, so we have a dry system
to feed all the sprinklers.
David Bitton, ing./Eng.
Quest Loss Control Services Inc.
Les services de prévention des sinistres Quest
5100, rue de la Savane, bureau 200
Montréal, Québec
H4P 1T8
(514) 341-4545
<http://www.questlosscontrol.com/> www.questlosscontrol.com
From: Sprinklerforum
[mailto:[email protected]] On Behalf Of
Prahl, Craig/GVL
Sent: February 8, 2018 12:21 PM
To: [email protected]
Subject: RE: Church Steeple
When you say levels, we picture separated floor levels. Is that
what you have?
But then again it sounds more like a continuous shaft.
Are there landings at these levels? How often do they occur? How
big are they?
Does the stair run up through the center?
Craig L. Prahl
Fire Protection Group Lead/SME
Direct - 864.920.7540
Fax - 864.920.7129
Direct Extension 77540
CH2M is now Jacobs.
200 Verdae Blvd.
Greenville, SC 29607
[email protected] <mailto:[email protected]>
<http://www.jacobs.com/> http://www.jacobs.com
From: Sprinklerforum
[mailto:[email protected]] On Behalf Of
David Bitton
Sent: Thursday, February 08, 2018 12:05 PM
To: [email protected]
<mailto:[email protected]>
Subject: RE: Church Steeple [EXTERNAL]
That’s not my situation, as the pitch is strictly at the top level.
Imagine an 11 storey tower, roughly 25 x 25 ft, with an 80 ft high
peaked roof above it. There is only one sprinkler at the top level,
and about 4 sprinklers at each level beneath it. The tower has an
open staircase within it so all of the levels are communicating. My
question is do I include sprinklers on multiple levels or just one
level at a time?
David Bitton, ing./Eng.
Quest Loss Control Services Inc.
Les services de prévention des sinistres Quest
5100, rue de la Savane, bureau 200
Montréal, Québec
H4P 1T8
(514) 341-4545
<http://www.questlosscontrol.com/> www.questlosscontrol.com
From: Sprinklerforum
[mailto:[email protected]] On Behalf Of
Roland Huggins
Sent: February 8, 2018 10:17 AM
To: [email protected]
<mailto:[email protected]>
Subject: Re: Church Steeple
ALONG the pitch of the ceiling(s) that is inside the HORIZONTAL
floor area IS one level. That’s why we have the section in 8.6.4.1.3
on steeply pitched ceiling
Roland
Roland Huggins, PE - Senior VP Engineering
American Fire Sprinkler Assn.
Dallas, TX
http://www.firesprinkler.org <http://www.firesprinkler.org/>
Fire Sprinklers Saves Lives
On Feb 7, 2018, at 3:58 PM, Fpdcdesign <[email protected]
<mailto:[email protected]> > wrote:
It's a tough call without seeming the drawing and/or visiting the
building. Without NFPA 13 (or other technical source) guidance, it
comes down to engineering judgement.
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
<tel:860-535-2080> 860-535-2080 (ofc)
<tel:860-553-3553> 860-553-3553 (fax)
<tel:860-608-4559> 860-608-4559 (cell)
On Feb 7, 2018 at 6:27 PM, < <mailto:[email protected]>
David Bitton> wrote:
Hello,
I have a very tall but narrow church steeple to protect. At the
peak, there is a single sprinkler head, with the lower levels having
between 2 and 4 sprinklers at each level. I am having a problem
determining the heads to include in my design area. The levels are
not closed off from each other, so I think that restricting the
calculations to one level would not be conservative enough. I have
not found any guidance in NFPA 13.
I would appreciate your thoughts about this issue.
David Bitton, ing./Eng.
Quest Loss Control Services Inc.
Les services de prévention des sinistres Quest
5100, rue de la Savane, bureau 200
Montréal, Québec
H4P 1T8
(514) 341-4545
<http://www.questlosscontrol.com/> www.questlosscontrol.com
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