Hazard Class defines the type of risk for a given area. Each Brigade Area may contain multiple hazard classes.
The SDS is a predefined response time target for brigades responding to an emergency event. Each Hazard Class has a different SDS.
Hazard Class 2 (Medium Urban) = 8 minute SDS
Significant urban areas which are primarily residential including commercial centres, clusters of industrial and/or high density community services e.g. schools, correctional facilities, hospitals.
Hazard Class 3 (Low Urban) = 10 minute SDS
All urban areas that are not included in Hazard Class 2 and includes predominantly residential occupancies and small industries.
Hazard Class 4 (Rural) = 20 minute SDS
Primarily involves natural surroundings in terms of bush and grassland, but also involves isolated dwellings and structures within those areas.
Hazard Class 5 covers very remote locations and very isolated dwellings. There is no SDS for this hazard class.
The SDS is applied to emergency events, such as building fires, grass and shrub fires, hazardous material spills and leaks, motor vehicle collisions, and fire alarms that require an emergency response (where CFA vehicles travel with lights and sirens).
CFA responds to a range of non-emergency events as part of its service to the community. These are events where there is no risk to life or property, and do not require an emergency response. The SDS is not applied to these events.