We have tunnel for infrastructure services (under ground) and my questions as following:
1-The voice evacuation is required or not for this service tunnel
2-If it is required can we use the speakers of public address system for evacuation
i need answers supported by CODE
appreciated
1-The voice evacuation is required or not for this service tunnel
2-If it is required can we use the speakers of public address system for evacuation
i need answers supported by CODE
appreciated