13. Lamp can adjust up,down or around and can be changed the projection angle
14. Environmentally friendly:instead of liquid mercury, easy to recycle
15. Applicable places: City Road,overpass,factory areas,bridge,harbour and etc.
| Minimum yield strength | 355 mpa |
| Minimum ultimate tensile strength | 490 mpa |
| Max ultimate tensile strength | 620 mpa |
Maintenance
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.
Production
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.
Manufacturer Tolerance
- 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
Mechanical Property
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.
