Smoke detectors in crawl spaces

[RmBo_0]

Hi,

Doing some wiring in an old building that's having offices put in and was asked today to put smoke detectors in the loft and crawl spaces. Seems a bit silly to me but is this normal?

Thanks.

 

[telectrix]

sometimes done. you'd need remote indicators on them as well.

 

[RmBo_0]

Do you know if there is any restrictions to how far the remote indicator is from the detector?

 

[RmBo_0]

I'm guessing it wouldn't really matter as long as I label them up

 

[telectrix]

i'd say as near as possible to the detector while still being visible to staff.

 

[RmBo_0]

Cheers tel

 

[Engineer54]

Hi,

Doing some wiring in an old building that's having offices put in and was asked today to put smoke detectors in the loft and crawl spaces. Seems a bit silly to me but is this normal?

Thanks.

It's not silly at all, especially if the crawl space/raised floor is used for forced air supply or return, in say a computer suite.

In fact in such an installation, smoke detectors would be installed above the false ceiling, within the actual room itself and under the raised floor. But then this would be mainly for a mass/deluge fire suppression discharge system, which comes with it's own rules for alarm and operation, that i won't go into here.

On all the projects i've been involved with over the last say 25 years or so, smoke detectors have always been installed under any raised floor installation where services are present.

 

[grantr37]

Vesda Laserfocus system would be suitable there.....

 

[snowhead]

Almost all the building I work on have Void smoke detectors.

The remote indicators are located either on the ceiling directly under the hidden void detector or at the access to the void.

 

[RmBo_0]

There's about 200 years if not more worth of dust and dirt in the spaces. I was just worried about them getting dirty and giving false alarms.

 

[tazz]

Theres you answer why you need detection in this area, woould suggest this is clean up first.
Any void detection requires access, for maintanence, so must be accessable by hatch or ceiling tile.