The emergency warning & public address system covers an integrated system for managing the evacuation of the building,
The prime function of an EWS is to transmit alert signals and evacuation signals clearly and reliably via speakers in emergency zones.
The EWS shall automatically initiate evacuation procedures or be manually operated
Evacuation is to be staged for each Floor.
The basement shall be treated as a separate zone.
Evacuation sequence shall be:
Iniate pre-alarm signal, by sounding sounder base detectors in the GF lobby and security room plus visual strobes.
Allow an adqustable time delay of 5 minutes prior to initiating first stage evacuation.
First stage evacuation:
Evacuate the fire effected floor plus the floor / zone above,
Second stage evacuation: go to general evacuation of the building.