The right guy with the clever tools developed for VRP could handle it better
than others, but if you're talking a dry head, and excessive distance up
into the ceiling, it'll accentuate the difficulty.
glc
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After doing the math the pressure loss can be accounted for by the
change in elevation and the loss through the backflow at the low flow.
I was unaware of the loss in pressure with no/little flow on the BFP.
Thanks for everyone's input on the matter.
Dewayne
-Original Message-
From:
Roland,
So what you are trying to tell me so delicately is that I was wrong and
my sprinkler is over spaced according to rules. I really appreciate
this forum for all the guidance it provides.
Dewayne
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Being in the center of your rectangle (sounds like new wave psych-
babble) does not necessarily mean splitting the difference. It gets
more confused with different types of sprinklers especially since it
is NOT defined by 13. I too would count the boundary as the 7 ft
mark from the EC.
Question:
I have a situation where I am showing a flexible coupling within 24 of the
drop that supplies two CONCEALED pendent sprinklers located in acoustical
ceiling tiles. For drops that only supply a single sprinkler I am only
indicating a drop pipe without any flex. There is a debate that
Hey Shannon, long time no hear, Hope all is well. Still in Ohio?
Anyway,
NFPA 13, 2007 9.3.2.3 states, Flexible couplings will be installed as
follows: (5) Within 24 of the top of drops exceeding 15ft in length to
portions of systems supplying more than one sprinkler regardless of pipe
size.
Yes, still in Ohio.
The drops are 18' long. Branch lines are located in bar joist space in a
very high space and ceiling is at 9' AFF.
The drops that are single heads I feel are ok. It's the ones where it splits
and supplies two heads where I have a concern.
Shannon Splawn
-Original
Hello George,
Use a Crowfoot type open end, 3/8 drive extension, and a ratchet to
reach up beside the drop to hold the hex on the CPVC fitting has worked for
us in a lot of cases.
This is a reference link for those that do know what this is. Not a
referral...
