What is required for structures placed within the airfield environment?

For structures placed within the airfield environment, it is essential that they are frangible to the maximum extent practicable. This requirement is rooted in safety considerations for aviation operations. Frangible structures are designed to break apart or collapse when struck by an aircraft, thereby reducing the risk of the aircraft being severely damaged or the danger of fire and injury to personnel on board. This is crucial during emergency situations or accidents, where the priority is to minimize harm to both the occupants of the aircraft and any individuals on the ground.

In contrast, while durability, visibility, and proper installation are important factors overall, they do not prioritize the critical need for safety in the event of an aircraft incident. Therefore, the emphasis on constructing frangible structures underscores a commitment to minimizing risks associated with airfield operations and aligns with established safety regulations in aviation.