We also had to install sprinklers.
Richard Woods
----------
From: Ken Javor [SMTP:[email protected]]
Sent: Wednesday, November 17, 1999 1:37 AM
To: Price, Ed; '[email protected]'
Subject: Re: Shielded Enclosure Fire Hazard
This happened to me at a previous employer. There is some sense to
it in
that foam absorber is quite flammable, even with modern precautions
and
flammability requirements. We had to install sprinklers. The system
was set
up so that the sprinklers are dry until a smoke alarm signal allows
charging. And only after a sprinkler fusible link melts does the
sprinkler
go off. This gives you a shot at saving your room. You used to be
able to
outfit a room with halon, but that is now an environmental no-no,
and
although halon was quite expensive, its replacement is even more so
(natch).
The halon was not a replacement for sprinklers, but if the halon put
out the
fire before the sprinklers sprinkled, you saved your absorber.
I don't have a feel for the economics anymore, but if the frequency
range is
right, what is the tradeoff of replacing your cones with ferrite
tiles and
skipping the sprinkler installation?
----------
>From: "Price, Ed" <[email protected]>
>To: "'[email protected]'" <[email protected]>
>Subject: Shielded Enclosure Fire Hazard
>Date: Tue, Nov 16, 1999, 8:22 PM
>
>
> Hi Listmembers!
>
> My lab just had an annual inspection visit by our friendly fire
hazard
> inspector. Seems that after 4 successive years of inspections, I
suddenly
> failed this year. The reason is that my 24' x 35' x 10' modular
shielded
> enclosure doesn't have internal water sprinklers.
>
> Now I'm all in favor of sprinklers; there's several in the ceiling
of the
> parent room that contains my enclosure. But that doesn't protect
the
> contents of the shielded enclosure. What if a fire started inside
the
> enclosure and then had time to grow? The parent room sprinklers
might not be
> able to stop the blaze then! Never mind that there's almost no
fuel within
> the enclosure; just fire-retardant rated anechoic foam and a 10'
long table
> made out of wood 4x4's.
>
> So I don't suppose this is really about common sense. Has anyone
recently
> addressed the issue of fire protection within a shielded
enclosure? Or
> should I move right on to the sprinkler RFQ phase?
>
> Regards,
>
> Ed
>
>
>
:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-)
> Ed Price
> [email protected]
> Electromagnetic Compatibility Lab
> Cubic Defense Systems
> San Diego, CA. USA
> 619-505-2780 (Voice)
> 619-505-1502 (Fax)
> Military & Avionics EMC Services Is Our Specialty
> Shake-Bake-Shock - Metrology - Reliability Analysis
>
:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-)
>
>
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