Tom,
The only difference from pendants as regards obstructions is that single
obstructions up yo 4 in. wide can be ignored with uprights. It's
application is much more limited than pendants, e.g. it has a 35 ft.
building height limitation and can only be used to protect cartoned
unexpanded plastic.
Joe
Tom L wrote:
Joe,
What is the obstruction criteria for an upright ESFR? FM 2-2 and
NFPA13 is not clear. Can you provide some guidance or point me to a
code section I have missed? I know is it less then the pendent ESFR
but what to you follow? I have been told it has the same criteria as a
standard head , is this correct?
Thanks
Tom
From: Joe Hankins <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: Mismatch of upright and pendent sprinklers
Date: Thu, 25 Jan 2007 21:27:15 -0500
Dan,
That is almost exactly what was tested. The concern was that the
upright would operate first and prevent the pendant from operating.
It operated first, but the pendant operated almost immediately after
it. It makes a good solution for obstruction problems in existing
systems, but the 35 ft. height limitation can be a deal killer.
Joe
Dan Arbel wrote:
If there is no problem of mismatch,
Then what about the difference in clearance between the two types.
In one particular case I found the upright at 5in and the pendent at
14in
clearance, next to each other.
Dan
Dan Arbel Risk Eng
T: +972 (04) 8243337
F: +972 (04) 8243278
M: +972 (052) 2810593
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Roland
Huggins
Sent: ä 25 éðåàø 2007 21:39
To: [email protected]
Subject: Re: Mismatch of upright and pendent sprinklers
No restrictions that I am aware of.
If memory serves me right, FM made an earlier statement that
localized upright ESFR sprinklers could be used within an otherwise
pendent ESFR system. That had to break the heart of the mfg that
developed the first upright (since they are far superior in regard
to obstructions).
Joe - any comments?
Roland
On Jan 25, 2007, at 9:31 AM, Dan Arbel wrote:
Dear All,
What is your opinion regarding the use of upright and pendent ESFR
sprinklers in the same area?
What about mixing brands of different manufacturers?
Dan
Dan Arbel Risk Eng
T: +972 (04) 8243337
F: +972 (04) 8243278
M: +972 (052) 2810593
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