The problem is that historically the standards have said that you
calculate the standpipe and sprinklers separately (and still do).
Logic and common sense (which are often missing in the standard making
process), would say that the STANDPIPE connections are also considered
independent and separate from the hose connections attached to the
sprinkler system that drive the 50 gpm per connection in the SPRINKLER
calc. That changed as shown by 13.A.11.1.5.6. in the 2007 edition.
THis was revisited in the 2010 edition and that guidance was deleted
from the Annex. Unfortunately the return to sanity was not on the
part of the technical committee which rejected the effort to change
it. The technical correlating committee fixed it. Nonetheless, it is
back to including only hose connections on just the sprinkler system
(stages, or in the past all warehouses but now just when required by
AHJ, etc).
Roland
On Dec 21, 2011, at 2:06 PM, Dewayne Martinez wrote:
Thanks Steve, so when does 11.1.6.5 (NFPA 13,2010ed) come into play?
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