Poles have a limited life cycle and are exposed to numerous negative effects – humidity from the outside (rain, dog urine etc.), humidity from the inside (condensed water), aggressive soil conditions and many loads (wind, signposts, cantilevers, stays etc.). These factors lead to corrosion-induced reduction of cross-sections and thus load-carrying capacity as well as to material fatigue over time.
Therefore, an assessment of the stability of poles is required at regular intervals.