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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Fire Safety => Topic started by: Paul2886 on April 26, 2012, 09:00:07 PM

Title: wall mounted smoke detectors
Post by: Paul2886 on April 26, 2012, 09:00:07 PM

Where it is logistically difficult to mount smoke detectors on the ceiling can they be walled mounted although not best practice. This is in a premised with private flats and holiday lets to achieve a system to the standard L2. Obviously they will be a criteria as to the distance from the ceiling but any other info would be appreciated.

Title: Re: wall mounted smoke detectors
Post by: Growler on April 26, 2012, 10:27:41 PM

Paul
BS: 5839 Part 6 smoke detection can be wall mounted dependant on the room / compartment size (not exceeding 10 metres in both length and width) with a limiting overall area not exceeding 50m2. Reference should however be made to the manufactures instructions which should confirm if the detector(s) can be wall mounted or not.

If they can then the top of the detectors should be mounted between 150mm and 300mm below the ceiling, the bottom of the detector should be above the level of any opening i.e. door.

Hope this helps

Title: Re: wall mounted smoke detectors
Post by: AnthonyB on April 27, 2012, 05:16:39 PM

But is it a Part 6 system as the OP is referring to L2?

Title: Re: wall mounted smoke detectors
Post by: Bill J on May 01, 2012, 07:40:19 AM

There are times when its acceptable in a Part 1 system.

22.3 e)  Detectors within rooms that open onto escape routes in a Category L3 system should either be sited in accordance with 22.3d) or should be sited on a wall, close to any door that opens onto an escape route. Wall mounted detectors should be sited such that the top of the detection element is etween 150 mm and 300 mm below the ceiling, and the bottom of the detection element is above the level of the door opening.

The Original poster stated L2, but presumably the above would be acceptable as long as it didnt impact on the higher risk areas identified!

Title: Re: wall mounted smoke detectors
Post by: Paul2886 on May 02, 2012, 09:06:11 PM

Thanks for you replies and to confirm I was referring to wall mounted smoke detectors within corridors and stairways to achieve a standard of L2. Any further comments would be appreciated

Title: Re: wall mounted smoke detectors
Post by: colin todd on May 03, 2012, 11:28:34 PM

That wont comply. End of.

Title: Re: wall mounted smoke detectors
Post by: Paul2886 on May 08, 2012, 06:32:21 PM

Thank you for your replies its much appreciated

Title: Re: wall mounted smoke detectors
Post by: Dinnertime Dave on June 21, 2012, 10:33:25 PM

I have heard of it once in a hotel corridor that had asbestos within the ceiling preventing detection from being attached to the ceiling.