Re: Smoke Detection in a large enclosed venue

[ABLE1 <somewhere@xxxxxxxxxxx>]

On 11/9/2020 11:06 AM, RTS wrote:
> On 11/9/2020 9:03 AM, ABLE1 wrote:
>> 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
>>
>>
>>
>>
>
>
>    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.....
>

Thanks Rocky,

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

Les