The designing weight of the steel poles are usually relatively
light and is good for the operation, transportation, assemble and
The material is in accordance with NF EN 10025 standard and NF EN
10149 standard, it has the following property.
- Yield Strength=355 N/mm2
- Thoughness remains the same under 20 degrees below zero
- Galvanization is in accordance with NFA35503 standard class I
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.
- Component Length: -25mm to 75mm
- Straightness: 2mm/m
- Twisting degree: 1̊ per 3 meters length
- Ovalisation : Maximum is 3%
- The average diameter : +/-0.5%
-Slip length: +/-150mm
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.