The state of compartmentation in the building should be investigated and consideration given to its protection if it has not been breached by firespread. Building plans, Site-Specific Risk Information (SSRI) and the responsible person may provide information on the standard of fire compartmentation. An understanding of the elements of construction, occupancy types and building use may assist when identifying the expected level of compartmentation.
During an incident, closing doors or leaving unopened doors closed may prevent the unnecessary spread of smoke, fire gases and subsequent damage. This action should be balanced against the need to maintain access, egress, tactical ventilation and evacuation.
The positioning of hose lines could compromise lobby area compartmentation, resulting in smoke spread into the firefighting shaft.