Wildland-Urban Interface and Structure Defense Awareness
What the exam tests
Wildland-Urban Interface and Structure Defense Awareness tests FFT1-level recognition: when a structure can be defended, when it cannot, and how to operate without turning a wildfire assignment into an unsafe interior attack.
Core rules
- Structure triage considers access, water supply, defensible space, construction, roof type, and fire behavior. A structure with no safe access or no survivable space is not a defendable position.
- Wildland crews are not automatically structure firefighters; interior attack requires training, PPE, and a water supply.
- Prepare ahead: clear immediate fuels, close windows, remove flammables, identify escape routes, and establish a safety zone outside the structure's collapse zone.
- Defensive operations protect the structure from exterior fire; withdraw when fire behavior exceeds the defensible space or water supply.
- Power lines, propane tanks, and vegetation close to the roof are indicators to reevaluate.
Worked example
A cabin has a wood-shake roof, dense brush to the wall, a narrow driveway, and no water source. The fire is spotting toward it. The correct FFT1 decision is to classify it as not defendable, keep crews out, and protect the escape route; the reasoning is that roof ignition and access and water limits make a stand unsafe. A defendable structure would have safe access, defensible space, and a water supply.
Traps
Treating every structure as savable; committing under power lines; using a structure as a safety zone; ignoring evacuation and egress.