Because of the long and thin shape, closed polygonal section and
apply of high strength steel material, these steel poles have
excellent durability. They can withstand the extreme condition,
such as the frost climate, unbalanced loads, or breaking of wire.
The designing weight of the steel poles are usually relatively
light and is good for the operation, transportation, assemble and
The hot dip galvanization treatment can increase the service life
of the steel pole without the environmental pollution and no need
for other daily maintenance. The following described types are
specially designed for Africa Market which can meet the regulated
height and load standard of France electricity power company.
Our steel pole is bent to form to the polygonal (conical) section
firstly. Then it is welded by the automatic submerged-arc. Then it
is welded by the automatic submerged-arc welding machine.
Thirdly the top cap, strip and base plate will be welded to the
pole. And finally other accessories (support brackets, ladder
support, etc.) will be welded to the pole shaft.
The galvanization of the steel pole are under strict control.
Galvanization is achieved by immersion in a molten zinc bath(450̊)
after pre-treated (dipping).
The metal supports are designed to withstand the nominal force F
and the pressure of the wind V applied at 0.25m from the top. Under
these loads, the safety factor with respect to the elastic limit of
the steel is larger than 1.8. The post also resists a torque equal
to (F+V) ×1m. Tests shows the load intervened when breaking is
around 2 times of design load.