I suspect that your confusion stems from assuming that the required
K-11.2 forces you to go to section 16.2.2. There are Large Drop
sprinklers with a K-11.2 and spray sprinklesr with a K-11.2. So yes
you can stay with the control mode density. You can also go to a
larger K-factor and save some pressure (such as going to a K-16.8)
Roland
On Sep 20, 2012, at 1:10 AM, Andrei Titel wrote:
I'm new in using NFPA 13 and I would appreciate your
help for the following matter:
For class IV rack storage according to NFPA 13 I have
two options to design my sprinkler system:
-control mode density area
-large drop sprinklers and specific application
control and mode sprinklers.
According to table 16.2.1.3.2 I have to use fig
16.2.1.3.2(d) curve E. For me to reach sprinkler density I must use
ELO
sprinkler K 11.2.
My question is: can I still use control mode density
or do I have to use large drop application, because according to table
16.2.2.1 for K 11.2 sprinkler the minimum sprinkler operating
pressure is 3.5
bar for class IV.
This is an existing system and the pump can't deliver
that much pressure.
Thank you.
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