Smoke Detection in a large enclosed venue

ABLE1

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Nov 9, 2020, 10:03:08 AM11/9/20

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Hey guys,

This is a I don't know question and looking for a answer
thingie. This is not for a project or job just curious.

My brother, (who only guesses an answer since he doesn't
really know one way or the other). Mentioned to me the
other day that he heard that some large group was playing
at a venue and because of there FOG MACHINE it tripped off
the FIRE ALARM. He then said that they must have replaced
the smoke detectors to units that can only see smoke and
not FOG. Well I said to him that they more than likely
turned off the smokes while the FOG was there and then
turned them back on later because the smoke detectors
can't tell the difference between smoke, dust, spiders and FOG.

What this did was made me think what a Alarm Company would do
in the case to actually meet code compliance??

Beam Detectors can maybe be adjusted somehow or to maybe off.

Heat Detectors can surely work and not be effected but for
heat only. Not a good thing and really not code.

Ionization Smokes maybe not sure............ doubt it.

Turn off, and station multiple human bodies for a fire watch
during the event to yank on a Pull Station if there is a
real fire event observed.

Get a variance with the jurisdiction to allow something other
than smoke detectors during an event that uses FOG Machines.

Anybody know or been involved is something like this??

Again just curious.

Thanks,

Les

RTS

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Nov 9, 2020, 11:06:59 AM11/9/20

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some AHJ's will go with the "Human fire watch" during the event..
((smoke zone in that area disabled))
with some local FD personnel on hand, (at event's expenses) ...
Usually require an official inspection after the event to
re-affirm system fully operational...

"Politics", as usual is the call on this.....

--

*Rocky T. Squirrel, esq.*

ABLE1

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Nov 9, 2020, 1:32:11 PM11/9/20

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Thanks Rocky,

And also common sense applies.
However that seems to be in short supply lately.

Les

Jim Davis

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Nov 9, 2020, 1:42:41 PM11/9/20

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I"ve never used them but beyond photoelectric and Ionization there are also flame detectors. Usually used in large areas.

ABLE1

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Nov 9, 2020, 2:10:48 PM11/9/20

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Hi Jim,

Now that is interesting.............. So would that be more
of some kind of a video temperature sensing device of sorts??

Les

ABLE1

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Nov 9, 2020, 2:28:43 PM11/9/20

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Just did a quick search and found that Honeywell makes them.
They seem to have UV ratings that can see the flames themselves.
Also it appears that they are geared more for a industrial type
environments.

It would be a twist to place in a large venue since they appear
to have a range of 100 to 200 feet at a 90 to 110 degree spread.

No question it would have to be accepted by the AHJ. Not cheap
per device at about $2000+- each.

The above assessment is after looking for about 10 minutes.

I am now done looking due to brain overload. :-)

Les

Bob La Londe

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Nov 9, 2020, 4:56:05 PM11/9/20

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When I was a tech for another company a long me ago we had a "semi"
assisted living fire system in an apartment building. Every year when
we did out complete test and clean we had to posted a fire watch at the
end of every hallway for the duration. The building was obviously
occupied as it was impossible to get everybady to go shopping so we
could work unencumbered.

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ABLE1

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Nov 9, 2020, 7:59:18 PM11/9/20

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On 11/9/2020 4:56 PM, Bob La Londe wrote:
> When I was a tech for another company a long me ago we had a "semi"
> assisted living fire system in an apartment building. Every year when
> we did out complete test and clean we had to posted a fire watch at the
> end of every hallway for the duration. The building was obviously

> occupied as it was impossible to get everybody to go shopping so we
> could work unencumbered.

That must have been a costly inspection??

Jim Davis

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Nov 9, 2020, 9:57:50 PM11/9/20

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Take a look at these: I think they come in various flavors. Infra red or Ultra violet or the two combined. I've only read about them in sales adds, so I'm not familiar with the science behind it.

https://www.sense-ware.com/?utm_source=google&utm_medium=ads&utm_campaign=flame-detectors-vs&gclid=Cj0KCQiA7qP9BRCLARIsABDaZziDViplDAcIeFnLrVF3cs49oDwYGX0G1-L3-KZH4YrtMvJGUNBBgi8aAvswEALw_wcB

https://www.findinfoonline.com/web?qo=semQuery&ad=semA&q=honeywell%20flame%20detector&o=1458613&ag=fw11&an=google_s&gclid=EAIaIQobChMIofGpwvz27AIVBL3ICh3z0A-cEAAYASAAEgJrcPD_BwE&rch=us317

Jim Davis

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Nov 9, 2020, 10:00:41 PM11/9/20

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Opps, I didn't read all of your post before I sent this.

ABLE1

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Nov 10, 2020, 8:09:32 AM11/10/20

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On 11/9/2020 10:00 PM, Jim Davis wrote:
> Opps, I didn't read all of your post before I sent this.

LOL
Aha!! Trying to get the last word are you??
:-)

Bob La Londe

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Nov 12, 2020, 1:59:55 PM11/12/20

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Yup. A few years after I had my own business they asked me about doing
their inspection and service, but I didn't want that headache. I could
have taken a lot of jobs from Kurt if I was that kind of person. I
picked up a few, but they came to me because... well you can't get along
with everybody.