Thanks,
Definitely going to have a separate riser, I do not see any need to balance the 
two since they are both from different systems. what do you think?

Thanks for the input 


George Medina Jr. 



-----Original Message-----
From: Todd Williams <[email protected]>
To: sprinklerforum <[email protected]>
Sent: Mon, May 21, 2012 1:57 pm
Subject: Re: In Rack Sprinkler Supply


There is nothing I have seen that says in-racks must have a dedicated riser, 
nly that they must be separately controlled. I think that arrangement would be 
cceptable, but I would install a control valve on the feed to the in-racks. 
ake a look at the diagrams in 8.16.1.6 in the Handbook.

t 04:34 PM 5/21/2012, you wrote:

I am designing an In-rack sprinkler system in an industrial building that has 4 
xisting Automatic Sprinkler Systems that are wet and configured as a grid. They 
re  located directly under the collector grid main. Is there anything in 
FPA-13 that will not allow me to connect the in-rack supply from an adjoining 
prinkler System. The in racks are double row racks and running parallel with 
he grid lines, so when I calculate the ceiling sprinklers directly above the 
acks and calculate the in racks sprinklers, I will be flowing from two 
ifferent risers, if so would I still need to balance the two? It is 
conomically advantageous not to connect at the base of the riser or to the 
upply main of the directly overhead system.

Thank You, 

George Medina Jr. 




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Todd G. Williams, PE
ire Protection Design/Consulting
tonington, CT
60.535.2080
ww.fpdc.com
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