Means of escape - place of safety:

The means of escape in a building are often supplemented by a fire warning system that may or may not include automatic detection, depending upon the circumstances. Protecting an escape route will have a reduced benefit if none of the people at risk from fire receive a warning that there is a fire threatening their escape route.

All means of escape should lead to a place of safety.  There are two types of place of safety. There are places of relative safety and there are places of ultimate safety.

A place of relative safety is a space within the building, often a protected staircase enclosure, where people are no longer at immediate risk from a fire. A place of ultimate safety is outside the building, well clear of the effects of any fire.