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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Fire Safety => Topic started by: mosh on April 02, 2023, 12:41:13 PM

Title: long corridor
Post by: mosh on April 02, 2023, 12:41:13 PM

Hello,

I have come across a three-storey block of flats, with an extended ground-floor, containing 19 flats in a single corridor. There is only 1 means of escape and the distance from the most distant flat to the corridor fire door at the other end is approx 30m (plus approx another 10m from there to the exit).
There are 3 AOVs within the corridor - one near each end, and one in the middle.
There do not seem to be escape windows from the flats.
The building employs a Stay Put procedure.
Would the fact that there are so many AOVs mitigate the length of the corridor?

Thanks

Title: Re: long corridor
Post by: AnthonyB on April 02, 2023, 09:52:34 PM

Are they natural shafts or mechanical extract? Or just windows with actuators

I've seen extended corridors with single stair/exit where two would be required if using ADB for design where the fire engineers modelled a compliant solution by sprinkler protecting the flats and replacing the usual natural ventilation of the corridor with powered extract and make up air.

Worked well on the simulation, less so when the block had a fire and the fans failed!

Title: Re: long corridor
Post by: mosh on April 03, 2023, 01:01:23 PM

These are windows with actuators.

I don't believe there are sprinkler systems within the flats.

Title: Re: long corridor
Post by: Dinnertime Dave on April 04, 2023, 06:36:43 PM

I?m not saying you have got this system, but something to be aware of

 https://cms.esi.info/Media/documents/Colt_corridorsystem_ML.pdf (https://cms.esi.info/Media/documents/Colt_corridorsystem_ML.pdf)