I’ve seen this before.  The premise is that if the ceiling system is impaired, 
the rack system in the same zone, being connected to a different source could 
still function.

This one a wide open building so if you rolled up on it, there wouldn’t be an 
issue figuring out where the fire was.


Craig L. Prahl
Fire Protection Group Lead/SME
CH2M
200 Verdae Blvd.
Greenville, SC  29607
Direct - 864.920.7540
Fax - 864.920.7129
CH2MHILL Extension  77540
craig.pr...@ch2m.com


From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On 
Behalf Of Bruce Verhei
Sent: Wednesday, October 12, 2016 6:17 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: In-Rack Sprinkler Control Valve [EXTERNAL]

I thought the reason this was commonly done was driven by friction loss.

As far as zoning alarm local jurisdictions commonly tinker with this area of 
model codes during adoption, and during adopting rulings. Sprinkler folks who 
think AHJ's do to much localizing would be shocked with what is common practice 
in the alarm world.

Does the local AHJ require point identification of the alarm? And does that 
extend to on site annunciation? If so, I'd accept S. Ceiling and N. In-Rack 
Sprinklers as one point, and N. Ceiling Sprinklers as another.

Best

Bruce Verhei

On Oct 12, 2016, at 14:47, James Crawford 
<jcrawf...@phaserfire.ca<mailto:jcrawf...@phaserfire.ca>> wrote:
The building is 70,000 sq ft and a multi-tenant building


Thank you


James Crawford
Phaser Fire Protection Ltd.
Phone  604-888-0318
Fax 604-888-4732
Cel 604-790-0938
Email  jcrawf...@phaserfire.ca<mailto:jcrawf...@phaserfire.ca>



From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On 
Behalf Of rongreenman .
Sent: Wednesday, October 12, 2016 2:19 PM
To: 
sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org>
Subject: Re: In-Rack Sprinkler Control Valve

Why is it zoned? Just because it's bigger than 52K? One big open space? Not 
trying to be a smart ass (or maybe I am) but the FD won't fight a fire in zone 
2 that is happening in Zone 1 bec aide an annunciation says here, not there, 
and it sounds like they'd be able too see the fire on entry.

On Wednesday, October 12, 2016, James Crawford 
<jcrawf...@phaserfire.ca<mailto:jcrawf...@phaserfire.ca>> wrote:
I just came from a building where the in-rack sprinklers are connected into the 
adjacent roof system.

The building has two roof zones, north and south, the in-racks are in the north 
zone but connected into the south zone (no control valve at the connection 
point)

I have never ever thought of doing this as it would send two different signals 
in the event of a fire, but cannot seem to find anything that says you can’t do 
this, with the exception of alarm signals.

Any comments on this arrangement?


Thank you


James Crawford
Phaser Fire Protection Ltd.
Phone  604-888-0318
Fax 604-888-4732
Cel 604-790-0938
Email  
jcrawf...@phaserfire.ca<javascript:_e(%7B%7D,'cvml','jcrawf...@phaserfire.ca');>



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