Where two or more hazards can be simultaneously involved in fire by reason of their proximity as determined by the AHJ.

• A. Single Hazard Area
• B. Dual Hazard Zone
• C. Multiple Hazard Area
• D. Adjacent Hazard Area

Answer: (A)

The key idea is how proximity between hazards shapes how we designate the protection area. When the AHJ determines that two or more hazards could be involved in a fire at the same time simply because they are close to each other, the space is treated as one hazard area. Treating it as a single hazard area ensures the fire protection system is designed to address the combined exposure and behavior of that whole zone, rather than trying to protect separate hazards as if they were independent. The other terms imply distinct, separate hazards or zones, which isn’t appropriate when proximity allows a single fire event to impact multiple hazards.