Fire rated emergency mini down lighter........

[FFM]

Hi all,

I have a question....

Does anyone know of a fire rated emergency mini downlighter that has been specified for use within a metal web (posi joist) ceiling? Fire rating must be 60 or 90min due to joist depth.

I am struggling to find anything other than converting a fire rated standard mini down lighter, but am limited as the conversion pack needs to be installed through the cut out as zero access from above. The smallest (diameter wise) kit I can find is 42mm and discrete is the name of the game with this project. I would like stay clear of a remote battery system if at all possible......

Any ideas of products would be amazing!

Cheers,

FFM

 

[UNG]

Have you looked at Ansell

 

[FFM]

Hi UNG,

Yeah, I spoke with their tech services earlier this week and none of their emergency down lighters have a fire rating. Bit surprising really....

 

[UNG]

How about KSR lighting
https://ksrlighting.com/amfile/file/download/file/11453/product/7097/
This datasheet lists emergency options

 

[FFM]

Hi UNG,

Yeah, seen these but only tested against solid joists and not web joists! Their range is also too large (physically) for the project! It's a real pain.

I have a plan B, which is the conversion of standard mini downlighters (cut out 42mm, bezel 48mm) but am getting some grumbling re the standalone LED indicator that will also need to breach the barrier from the FO. The designer squawked when `I mentioned the discrete, twin spot units like the Lluma emlux.....

I have spoken with various fire companies and they dont have any suggestions either... I know that the new `google building in London is an all timber construction with web joists, so might also try to see what they did.

Grrrrr!

 

[binky]

Wood is wood, so I'm not sure how much difference web v solid timber makes, if any?

 

[FFM]

Hi Binky,

Great reply! Shared it with the site manager and lead designer. Site manager did smile (a bit!) but the lead designer didnt!

On a more serious note, if anyone does have any info on a fire 30. 60 or 90 min rated mini down lighter rated against web joists please pass this on!

Cherers,

FFM

 

[binky]

Hi Binky,

Great reply! Shared it with the site manager and lead designer. Site manager did smile (a bit!) but the lead designer didnt!

On a more serious note, if anyone does have any info on a fire 30. 60 or 90 min rated mini down lighter rated against web joists please pass this on!

Cherers,

FFM

I have a lifetimes worth of experience in stating the bleeding obvious

Ok, more serious note, if the downlighters are designed not to set fire to whatever ceiling material they are fitted too, which could be anything from pvc facia boards to plasterboard to wood cladding, then why would they set fire to any form of joist, web or solid. I have seen downlighters where some prat has literally holesawed through supporting timbers - not so much as a scorch mark, and those were halogen.

 

[FFM]

It's more about the spread of fire and smoke through the void spaces and not about wether a down lighter or fitting catches fire. Solid joists prevent the spread of fire and smoke for longer than web joists and can support a floor longer and thats the key from an install point. How fire and smoke will penetrate through different materials dictates what type, and rating, of fitting can be used. Each type of ceiling and joist will, and does, behave differently to another. Understanding this will affect selection of the components installed. An obvious analogy is Grenfell, which has changed how and what we install.

A 30 min rating for a down lighter in one ceiling does not mean that it is 30 min rated in all ceilings and so on.

Hence my ask....

I hope this makes sense.