SMOKE CONTROL BY PRESSURISATION
Fire induces forces create pressure differences across
doors etc,which allow smoke flow through any gaps present.By
altering these pressure diffferences we can control the
movement of smoke.
a-)Airflow can control smoke movement if average velocity
is of sufficent magnitude .(Large gaps,open doors etc.)
b-)A pressure difference across a barrier can act to control
smoke movement. (Closed door etc.