Airport monitoring equipment with easy-to-break and fragile poles

Airport Folding and Fragile Poles Application Scope: Support structures for all aid facilities within the runway obstruction limitation surface.
Fragile and brittle items — may fracture (break), bend, or yield under specified impact forces, thus becoming a relatively lightweight object that poses minimal harm to aircraft.
Fragility
Various visual and non-visual navigation facilities at airports (such as approach lighting towers, meteorological equipment, radio navigation equipment, etc.) are typically located near runways, taxiways, and aprons. Failure to prevent accidental collisions with aircraft in flight or on the ground during takeoff or landing can be hazardous. All such equipment and their supports must be breakaway and installed as low as possible to ensure that collisions do not lead to aircraft control loss. Breakaway characteristics can be achieved through various design concepts, such as using lightweight, brittle, and low-toughness materials, components, and connectors, to ensure that breakaway objects shatter, bend, or yield upon impact.
Easy-bend and fragile pole towers (hereinafter referred to as "easy-bend poles") are support structures made in single-pole, tower-type, and other configurations, utilizing lightweight, fragile materials and bendable structures.
Condition for bendability of aviation easily breakable and fragile rods
For aircraft components that may not withstand a collision with an aircraft that has not taken off or landed, the bendable rods must bend and break upon impact from an aircraft weighing 3,000 kg and traveling at 140 km/h. For bendable rods on aircraft that may not滑行 on the ground upon collision, they must bend and break upon impact from 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.