The high power lines or transport are those which nominal voltage is equal or higher than 60 kV.
These lines link the production centers (thermal, hydro, wind) to substations or between several substations.
They are usually overhead, however, can be undergroundirlines, they are constituted by supports, normally metallic, with drivers suspended or supported by insulators. In this context the Metalogalva includes in its portfolio the tubular poles mains voltages up to 400kV.
The tubular poles are generally used in urban areas where space is limited or costly deployment.
Such structures are also very competitive comparing the posts of concrete especially when they are transported by sea to their final destination.