Prediction of human movement for improved life safety compliance
Different buildings have varying occupant loads and the exit capacities to suit the building purposes and configurations. Ideally, all buildings must be designed to allow people to manoeuvre freely at all times and evacuate rapidly with no congestion during an emergency fire situation.
Computer evacuation modelling can be used to optimise the flow of occupants in a complex building with high occupant loads to evaluate the effective movement time for all occupants to evacuate the building during a fire situation.
SHEVS fire engineers use evacuation modelling tools such as SIMULEX and PATHFINDER to test and validate building configurations in terms of the occupant movement time to achieve the Required Safe Escape Time (RSET).
RSET comprises of 3 components;
-The time taken for the automatic detection system to be activated.
ii. Pre-movement time, tpre
-The time taken for the occupants to receive and process the cues, signals and other alarms and decide to evacuate.
iii. Movement time, tmove
-The time for the occupants to evacuate the development vicinity.
For occupant evacuating from the room on fire, the movement time shall represent the duration of the exit fire door remain open for smoke spill during occupant evacuation.
RSET = tdet + tpre + tmove