My turn on the box
Allow me to suggest you broader your stance on why the residential
also requires 0.10. Your statement is mostly correct BUT that bit of
history was driven by a different cause. Remember way back to the
end of the last decade when we were down to a resultant density of
around 0.032 gpm/sf for residential sprinklers. A hoopla arouse
regarding labs performing repeat tests on listed sprinklers that did
not control the fire. This resulted in a change in the Expanded FOAM
used by the labs to simulate furniture as part of UL 1626 for listing
residential sprinklers. It turned out that the prior foam had heat
release rates that varied greatly. This also resulted in a change in
13D/R that defined a minimum density of 0.05 gpm/sf. A secondary
realization was that the test duration in UL1626 was only 10
minutes. This aligned perfectly with the goal of 13D but shall we
say is lacking for a high rise condo. Although we had NO loses
attributed to this issue we needed better correlation between the
testing of the sprinkler and it application. A reasonable and
immediate fix was to require a 0.1 gpm/sf to be applied concurrent to
the listing criteria and apply which ever produced the greater
demand. This provided assurance that we had adequate life safety AND
property protection.
Since then UL 1626 has been expanded to a 30 minute duration fire
test but the hybrid spray-residential sprinkler approach is not going
anywhere.
You can have your box back but wear boots since I sometimes pile it
kinda high. Can I be awarded a PhD (Pile it Higher & Deeper)
Roland (happy with a BS - with not providing)
On Apr 18, 2008, at 9:29 AM, Ed Kramer wrote:
Property protection is property protection, whether the sprinkler
used is a SSP or residential. That's the exact reason why a .10 gpm/
sf density is required when using residential sprinklers. So even
though I don't think the 3,000 sf DA is required, I think it should
be.
Exit soapbox, stage right.
Ed Kramer
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
