On Sat, 10 Jan 2004 00:53:32 -0500, Tbone wrote:


Don't kid yourself! After 24 years of experience in commercial high
rise const. If one head goes off the pressure surge will almost always
set off other heads in that general area.
Electronic areas should be isolated with a halogene (sp) system.

Tbone

Hummm ok. I only had 15 yrs in the business, in single or double floor
buildings and only had one case of possible sympathic release.
Shrug.

I did a lot of computer rooms with Halon release systems. Then did a
libaray with power shutdown and water release. Interesting project.

Btw..did Grinell ever get all those defective heads replaced? What was
the final count..around 35 million heads? G

Gunner



On Wed, 07 Jan 2004 07:38:54 GMT, Gunner
wrote:

On Tue, 06 Jan 2004 19:25:57 GMT, steamer wrote:

for instance sprinklers are now mandatory; there's one *directly*
over my computer, so if there's a little bit of hot weld that gets too
close to a squirter downstairs I lose everything!

Unless you have the odd Dry System..only the sprinkler heads which have
had the fusable plug/link melted will spray. If a head downstairs
sprays..no other heads will spray until they too are exposed to extreme
heat..so your computer is safe, unless it reaches that critical temp

"The actuation temperature varies depending on the occupancy. Look at
the arms of the sprinkler.
If they are chrome or unpainted, my bet is they are between 155F
and 165F. Please keep in mind that a sprinkler is a heat sink. The
fusible link or the glass bulb must reach the actuation temperature,
which means the ambient temperature is probably in the area of 325F."


Gunner






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