We all know that nothing ever falls out and that stuff never collects
in empty spaces under things, does it?
At 11:42 AM 1/5/2009, you wrote:
If you room for another foot, I'll toss out a thought
We have a high level of assurance that stuff will not be located on
the floor (that pesky automated equipment has little tolerance for
variances I assume).
Would you not consider that the main issue is having in-racks every
other level (provided they are typical heights) so as to limit the
amount of combustibles between rows of sprinklers. The 10 ft off the
floor is based on having a level on the floor and it reminds us that
the average load is expected to be 4 ft to 5 ft. It also addresses
taller commodities, whereas I would say that requires in-racks at
every tier.
SInce you seem to be our only AHJ on-line this fine day, what say ye?
Roland
On Jan 5, 2009, at 8:03 AM, Matsuda, Richard wrote:
110-feet?...woohoo...I don't think I've ever seen anything like this.
I'm glad I asked before I stuck my foot in my mouth.
I'll have to agree with Todd and change my answer to No, put the 1st
level of rack sprinklers at 10-foot as shown in the figure.
The storage arrangement is an extreme...and any source of ignition
would
probably be at the floor level. Having two levels of rack sprinklers
instead of one level below 20-feet seems like a better design to
control
the fire in the incipient stages. This is just my opinion so don't
shoot
me.
rick matsuda
city of dallas
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Fletcher,
Ron
Sent: Monday, January 05, 2009 9:46 AM
To: [email protected]
Subject: RE: 1st Level of in-rack sprinklers location
1. 110 ft. storage.
2. Every other level as shown in 17.3.4.1.3(d).
3. Class IV and Group A in cartons.
In this case it makes one level of sprinklers difference and in this
building it's a lot of sprinklers.
Ron Fletcher
Aero Automatic Sprinkler
21605 N. Central Ave
Phoenix, AZ 85024
P: 623.580.7836
F: 623.434.3420
C: 602.763.4160
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Matsuda,
Richard
Sent: Monday, January 05, 2009 7:52 AM
To: [email protected]
Subject: RE: 1st Level of in-rack sprinklers location
Ron,
My answer is maybe yes...but I'd like to know the full extent of the
storage before I agreed.
1. How high is the total storage? The chart is for over 25-feet high.
2. Where are the 2nd and 3rd levels of rack sprinkler located?
3. What is being stored?
Not that any of these questions make a difference, but I'd like to
know
what I'm agreeing to before it's all said and done.
Another question of similar nature...If your total storage arrangement
is 35-feet high, do you design for the total height of 35-feet or only
30-feet high since the lower 5-feet is dead space?
rick matsuda
city of dallas
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Fletcher,
Ron
Sent: Monday, January 05, 2009 8:21 AM
To: [email protected]
Subject: 1st Level of in-rack sprinklers location
Anyone want to take a shot at this?
Figure 17.3.4.1.3(d) indicates the first level of sprinklers to be 10
ft. approximately from the floor and is shown above the second cube in
the elevation view.
If there is a 5 ft. dead space (empty with no storage or other
equipment) from the floor to the bottom of the first level of storage
could the first level of in-racks be above the second cube but
approximately 15 ft off the floor? It's in a rack supported bldg. with
automated pickers so the machine can't go low enough to use the first
four or five feet from the floor so the space is empty.
Hope you all have a happy new year.
Ron Fletcher
Aero Automatic Sprinkler
21605 N. Central Ave
Phoenix, AZ 85024
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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