Remember friends that the text Travis quoted was _*added*_ in the 2010
edition of -13. Dewayne's inquiry began with a note that his project
was governed by the 2007. Still, the value for dry system water
delivery time of 15 seconds for residential occupancies was the first
item in Table 7.2.3.6.1.
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit our website <http://www.parsleyconsulting.com/> ***
On 04/06/2017 8:36 AM, Travis Mack, SET wrote:
It can be R or I occupancy. It doesn't matter. It is the fact you
are protecting a dwelling unit with a dry pipe system.
7.2.3.6.3 For dry pipe systems protecting dwelling unit portions of
any occupancy, the sprinklers in the dwelling unit shall have a
maximum water delivery time of 15 seconds to the
single most remote sprinkler.
It seems like you have 15 seconds regardless. Now, if you have a dry
pipe valve on the first floor and I believe you said these were on the
5th floor, it seems quite unlikely you will get 15 seconds. My
suggestion is to find a way to supply these sprinklers in the dwelling
units from a wet pipe system.
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
http://www.mfpdesign.com
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On 4/6/2017 8:16 AM, Dewayne Martinez wrote:
That was one of my concerns also. R-2 floor occupancy, calculating it
per light hazard but using residential heads. If the R-2 occupancy
is what would dictate the 15sec delivery time then it wouldn’t matter
what type of heads I used in the residential areas.
*From:*Sprinklerforum
[mailto:[email protected]
<mailto:[email protected]>] *On Behalf
Of *Travis Mack
*Sent:* Thursday, April 06, 2017 8:58 AM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* Re: NFPA 13 dry system - residential sprinklers
Double check delivery times. I think you need a 15 second delivery
time in residential areas.
Travis Mack, SET
MFP Design, LLC
"Follow" us on Facebook:
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Sent from my iPhone
On Apr 6, 2017, at 6:31 AM, Dewayne Martinez
<[email protected]
<mailto:[email protected]>> wrote:
The dry portion below the attic was laid out at max 15x15 spacing
with the
lines at 15ft above the floor. The way the rooms layout there
are long
runs with 8ft ceilings so I was going to drop down once to feed
all these
rooms with one line but I still need to size it. This reviewer
will still
make us calculate the residential build out portion. I can get
by with a
1 1/4" line calculating 4 heads.
-----Original Message-----
From: Mark Phillips [mailto:[email protected]]
Sent: Thursday, April 06, 2017 8:17 AM
To: [email protected]
<mailto:[email protected]>
Cc: [email protected]
<mailto:[email protected]>
Subject: Re: NFPA 13 dry system - residential sprinklers
If I'm understanding
The roof system is unchanged and your adding a lower supply to be
rooms.
Use standard qr heads and same pipe sizes
The roof is still most demanding
Sent from my Verizon 4G LTE Droid
On Apr 6, 2017 9:14 AM, Dewayne Martinez
<[email protected]
<mailto:[email protected]>>
wrote:
NFPA 13 (07ed)
I have an existing 5th floor shell space that is installed as a light
hazard dry system that has pipe in the shell space and in the
attic. They
are turning this floor into a dormitory (R-2).
1)Can I use listed residential heads on return bends and only
pick up 4
heads per 11.3.1.1 or will I need to pick up 1950SF? What if
there are
incidental areas such as a laundry room, ect. in the same areas
as the
dorm rooms?
2)What would be the required trip time be per Table 7.2.3.6.1?
15sec for
residential or 60sec for light hazard?
Thanks,
Dewayne Martinez
Fire Protection Design Manager
TOTAL Mechanical
Building Integrity
W234 N2830 Paul Rd.
Pewaukee, WI 53072
[email protected]
<mailto:[email protected]><mailto:[email protected]>
Ph: 262-522-7110
Cell: 414-406-5208
http://www.total-mechanical.com/
[cid:[email protected]]
[cid:[email protected]]
[cid:[email protected]] [Top Workplaces 2015]
TOTAL Mechanical voted "Top Workplace" for a 4th consecutive year.
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