It combines the toughness of non-prestressed poles with the strength of 15m-long poles. For terminal and corner positions bearing extremely unbalanced tension, its plastic performance provides enhanced safety assurance, preventing catastrophic pole collapse caused by accidental overloading.
It shares the same dimensions as 15m prestressed poles, but its internal reinforcement consists of dense HRB400 threaded steel bars. With a very high design bending moment, detailed structural calculations are required to determine the reinforcement scheme, ensuring ductility is maintained even under extreme conditions.
Exclusively used as terminal poles, large-angle corner poles, and tension poles for 35kV power lines. It is the preferred pole type at key nodes such as substation exits. It is also applied in power lines in poor geological conditions (e.g., soft soil and landslide-prone areas), utilizing its toughness to adapt to uneven foundation settlement.
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