MFD Posted September 14, 2022 Report Share Posted September 14, 2022 Hi All, Does anyone know what the minimum/ maximum recommended time delay is between hearing the audible fire alarm activation voice messages and the intermittent sounders that follow that message. This is for an 8 story open planned cooperate office building. Many thanks MFD Quote Link to comment Share on other sites More sharing options...
MFD Posted September 14, 2022 Author Report Share Posted September 14, 2022 Just to mention this is for a phased evacuation Quote Link to comment Share on other sites More sharing options...
AnthonyB Posted September 14, 2022 Report Share Posted September 14, 2022 It should be the other way around on a loop. Voice alarm systems should generally operate in the following repeating sequence (BS5839-8): Attention-drawing signal – lasting 2 s to 10 s followed by Brief silence – lasting 1 s to 2 s followed by Evacuate message followed by Silence – lasting 2 s to 5 s Quote Link to comment Share on other sites More sharing options...
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