Airport foldable and fragile pole

Airport foldable and fragile pole application scope: supporting structures for all auxiliary navigation equipment within the runway obstacle restriction area.
Fragile and brittle items — objects that will break (shatter), bend, or yield under specified impact forces, thereby reducing the hazard to aircraft from lighter-weight objects.
Crimp resistance
Various visual and non-visual navigation facilities at airports (such as approach lighting towers, meteorological equipment, radio navigation equipment, etc.) are generally located near runways, taxiways, and aprons. If an aircraft in takeoff or landing ground operations were to collide with them unexpectedly, it could pose a hazard. All such equipment and their supports must be collapsible and installed as low as possible to ensure that collisions do not lead to aircraft control loss. Collapsibility can be achieved through various design concepts, such as using lightweight, easily collapsible, and brittle materials, components, and connectors, to ensure that collapsible objects break, bend, or yield upon impact.
Flexible and fragile pole towers (hereinafter referred to as "flexible poles") are support structures made in single-pole, tower frame, and other configurations, utilizing lightweight, fragile materials and a flexible design.
Fragility and bendability conditions for aviation easily breakable and fragile rods
For aircraft with potential for no takeoff or emergency landing, the bendable rod must be bendable and breakable upon impact by an aircraft weighing 3,000 kg and traveling at 140 km/h. For aircraft with potential for no ground sliding, the bendable rod must be bendable and breakable upon impact by an aircraft weighing 3,000 kg and traveling at 50 km/h. The force exerted by the bendable rod on the aircraft during impact should not exceed 45 KN; the energy transferred to the aircraft by the bendable rod should not exceed 55 KJ.