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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Technical Advice => Topic started by: Big_Fella on February 17, 2009, 01:16:00 PM

Title: Fire System design regarding roof lights
Post by: Big_Fella on February 17, 2009, 01:16:00 PM

I have a scenario where an L1 system is being proposed for a school, which is fine.

The school is split on two levels, where one end of the school goes up full height of the building i.e. the corridor is 7 metres high, and has glazed roof lights in the roof of this corridor providing natural light.  The roof lights are 2.5 m2 and are approx 2 metres in depth.

Is there a requirement to provide automatic detection within the roof lights or will detection on the underside ceiling suffice?

Many thanks in advance.

Title: Re: Fire System design regarding roof lights
Post by: Graeme on February 17, 2009, 05:25:43 PM

to the standard any rooflight over 800mm in depth.

Title: Re: Fire System design regarding roof lights
Post by: Wiz on February 17, 2009, 05:39:58 PM

As Graeme says, detection is required in 'lantern lights' over 800mm in depth but also in any lantern light (less than 800mm in depth) also used for ventilation.

Title: Re: Fire System design regarding roof lights
Post by: Big_Fella on February 17, 2009, 08:12:24 PM

Thanks guys. Good definitive answer. I shall apply this.