point.
Any direction at all would be appreciated to help me in my research.
Chris Dorn
Dorn Fire Protection LLC
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We put floor controls in rated stairwells all the time so I do not see why you
couldn’t/ shouldn’t.
Christopher Dorn
On Mar 26, 2024, at 4:10 PM, Jeff Werre wrote:
Does code allow a sprinkler riser to be installed in a rated stairwell?
I cannot find anything that prohibits it, but would
John,
I think this may have gone to the wrong person. I was struggling with the local
3rd party plans examiner requiring that we pull a fire permit on the domestic
underground line that feeds the fire sprinklers.
Thank you,
Chris Dorn
[cid:image001.png@01DA7901.40E2BB20]
From: John Denhardt
We have been required to perform a flow test using the city fire truck and the
top two hose valves. I only did it once but the firemen seemed excited to do
it. I have been required to run some quick calculations to tell them what
pressure the pumper needed to provide at the FDC to give them the
I have a 13R sprinkler system whose water supply is a 2" combination
domestic/fire line run from the city main into the mechanical room. The plumber
installed the line and pulled the proper permits for the installation of that
domestic line. The plumber left a 2" outlet left inside of the
Brian,
This would be a cross connection of the potable water system with wastewater.
At minimum you would need a 1" air gap.
Chris Dorn
From: Brian Harris
Sent: Wednesday, August 23, 2023 8:53 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: [Sprinklerforum] Roof Drain / Sprinkler
Shove it full of insulation and presto! You have non-combustible enclosed blind
space which is not required to be protected.
Chris Dorn
From: Fpdcdesign
Sent: Tuesday, August 8, 2023 9:10 AM
To: Discussion list on issues relating to automatic fire sprinklers
Subject: [Sprinklerforum] Re
Oceg]
[https://ci3.googleusercontent.com/mail-sig/AIorK4xwBWEOX5v9mpza4Jqf9lOKSwThBNvyIO7Rl-Cxo7NRiV7p70C0f1biwbh44Y-iIA5GcmD1MCo]
[https://ci3.googleusercontent.com/mail-sig/AIorK4yPfO1HdtbQPYiKlYE38cwc88ABhX7xN1nh0fCK5LjFXjKplJggk3Xn6_XypmtMWyADKR7ZRGk]
On Thu, Jul 20, 2023 at 9:31 AM Chris Dorn
mailto:chris.d...
Brett,
I think you answered your own question. “I always choose whatever gives me the
greatest pressure loss not necessarily the larger flow.” Wouldn’t that by
definition be the hydraulically most demanding area regardless of location?
It’s exactly what I do also in this situation.
Chris Dorn
The amount of water that you will get out of a three-quarter inch water line
will be useless in trying to fight an electric vehicle fire.
Christopher Dorn
Dorn Fire Protection LLC
4132 Dumont Street #4
Cincinnati, Ohio 45226
(513) 295-2499
On Jul 5, 2023, at 1:31 PM, Brett Peters wrote:
I
Thank you Craig, That is perfect. I was conveying this issue to the builder and
his response was “I have no idea”. Not very helpful…
Chris Dorn
From: Craig Hanson
Sent: Friday, June 30, 2023 9:57 AM
To: Discussion list on issues relating to automatic fire sprinklers
Subject: [Sprinklerforum
Interested to see the responses as I'm dealing with this same question. Also
when the building has breezeways instead of corridors how do you get from one
block of units to the other without having piping in an unheated area?
Thanks,
Chris Dorn
From: Brian Harris
Sent: Friday, June 30, 2023
What about the new Victaulic flex dry heads?
Chris
Christopher Dorn
Dorn Fire Protection LLC
4132 Dumont Street #4
Cincinnati, Ohio 45226
(513) 295-2499
On Jun 2, 2023, at 12:30 PM, matthew.will...@ferguson.com wrote:
In Austin right?
I like your second option.
Pump a little conditioned air
I realize most on here are designers but I am wondering if anyone has
implemented the sonic equipment for NFPA 25 Internal pipe examinations? Whose
equipment do you use and how effective is the reading that you get?
Thank you,
Chris Dorn
[cid:image001.png@01D98FC1.6C934070
Suction Pressure
Chris-
But if I'm telling them the size pump we need, say 1000gpm @ 70psi in this
case, how would they oversize the pump?
Brian Harris, CET
BVS Systems Inc.
bvssytemsinc.com<http://bvssystemsinc.com/>
From: Chris Dorn
mailto:chris.d...@dornfireprotection.com>>
Sent:
Brian,
Since the pressure at the pump discharge is city pressure + pump boost pressure
then they need that pressure to properly size the pump.
Example: You need 1500gpm @ 105psi to make your system work but you only have
35psi residual pressure available from the city supply when flowing
Tiny little ½ drain holes which constantly get plugged up and overflow running
water all over the base and floor. Why these aren't larger is beyond me.
Chris Dorn
[cid:image001.png@01D983FF.99333770]
From: Brian Harris
Sent: Thursday, May 11, 2023 11:39 AM
To: Discussion list on issues
Sorry Ken, the classification is actually Nonexpanded, Unstable. Too many terms
flying around in my head when I typed the original.
Thank you,
Chris Dorn
[cid:image001.png@01D93645.727E8D80]
From: Ken Wagoner
Sent: Tuesday, January 31, 2023 3:12 PM
To: sprinklerforum@lists.firesprinkler.org
The commodity that I am dealing with is solid piled group A plastics. Exposed,
Expanded, Unstable, storage height >5 ft to <12 ft with max ceiling height of
20'.
The particular section of code which I am questioning is below. 15.2.2.7(2)
states that where table 15.2.2.5(a) allows densities
piping and
account for it in your hydraulic calculations for the sprinkler system.
Chris Dorn
Christopher Dorn
Dorn Fire Protection LLC
4132 Dumont Street #4
Cincinnati, Ohio 45226
(513) 295-2499
On Sep 9, 2022, at 2:17 PM, Bobby Welch wrote:
Is there a code that does not allow a plants
Does the panel monitor low suction? If so that would be an acceptable means of
monitoring that pipe section.
Chris Dorn
[cid:image001.png@01D8A8B0.C08D0F10]
From: Matt Grise
Sent: Friday, August 5, 2022 9:45 AM
To: Discussion list on issues relating to automatic fire sprinklers
Subject
Does the panel monitor low suction? If so that would be an acceptable means of
monitoring that pipe section.
Chris Dorn
[cid:image001.png@01D8A8B0.22E67A30]
From: Fpdcdesign
Sent: Friday, August 5, 2022 9:42 AM
To: Discussion list on issues relating to automatic fire sprinklers
Subject
We have used stove bolts with a large head and a long thread. That minimizes
the possibility of a trip hazard as there is only a small bump on top of the
grating.
Christopher Dorn
Dorn Fire Protection LLC
4132 Dumont Street #4
Cincinnati, Ohio 45226
(513) 295-2499
On Apr 26, 2022, at 2:46 PM,
should be
looking at curves A and C. Is this a typo in the code as I suspect or am I
misunderstanding the intent here?
Thank you,
Chris Dorn
For reference:
A - Single- or double-row racks
with 8 ft (2.4 m) aisles
and high-temperature
ceiling sprinklers
B - Single- or double-row racks
with 4 ft (1.2
I would have to agree with Matt. A new CO would mean it should be reviewed as a
new building and must meet all the requirements for protection of that
particular type of construction.
Chris
-Original Message-
From: Matt Grise
Sent: Thursday, February 4, 2021 2:49 PM
To:
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