Define Threatened Defensible

Define Threatened Defensible

• A. Safety Zones and TRA's are present and construction features exist, lack of defensible space or other challenges require firefighters to implement structure defense tactics during fire front impact.
• B. Safety Zones and TRA's are present; no additional tactics are needed.
• C. There are no safety zones or TRA's present; defense is not possible.
• D. There is a Defense plan that does not require tactics during the fire front.

Answer: (D)

Threatened Defensible means there is a formal defense plan in place for the structure that allows it to be defended without needing tactical actions during the fire front. The plan provides pre-determined steps and passive or pre-positioned measures that keep the defense effective even as the fire passes, so no on-the-frontline tactics are required at that moment. That’s why the best choice states there is a Defense plan that does not require tactics during the fire front. The other options imply either active tactics during the flame front, or that defense isn’t possible, or that merely having zones and refuges suffices without a plan guiding actions.

Threatened Defensible means there is a formal defense plan in place for the structure that allows it to be defended without needing tactical actions during the fire front. The plan provides pre-determined steps and passive or pre-positioned measures that keep the defense effective even as the fire passes, so no on-the-frontline tactics are required at that moment.

That’s why the best choice states there is a Defense plan that does not require tactics during the fire front. The other options imply either active tactics during the flame front, or that defense isn’t possible, or that merely having zones and refuges suffices without a plan guiding actions.