A brief about life safety in a building:- Every building shall be so designed, constructed, equipped, maintained and operated as to provide adequate means of egress to avoid undue danger to the life and safety of the occupant from fire, smoke, fumes or panic during the time period necessary for escape. There is a requirement to have announcement and voice guided system to direct occupant towards safe egress routes and to avoid panic during distress. This is a brief about the requirement mentioned is national building code of India. When you plan a meeting or assembly of people consider the above points.