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Structures for overhead lines take a variety of shapes depending on the type of line. Structures may be as simple as wood poles directly set in the earth, carrying one or more cross-arm beams to support conductors, or "armless" construction with conductors supported on insulators attached to the side of the pole.
Wire stringing includes all activities associated with the installation of the primary. conductors onto the transmission line structures. These activities include the installation. of conductor, ground wire, insulators, stringing sheaves (rollers or travelers), vibration.
The process can vary depending on the size of the line, soil conditions, terrain and other variables. Soil surveys and property staking: ... Construction access and tree clearing: ... Mobilizing equipment and delivering material: ... Foundation construction: ... Installing the structure: ... Stringing conductor: ... Land restoration:
Timeline: On average it can take 10 years or more to build a high-voltage transmission line. This timeline includes planning, scoping, mapping, environmental review, public comment, project approval, permitting, land acquisition, and construction.
Most often, a structure made of reinforced concrete or metal is used. First, the places under the supports are drilled. For this purpose, specialized equipment is involved, high-altitude installation work is carried out, and machines that can lift heavy loads are used.
These transmission lines will use a combination of lattice towers and support poles. The materials for construction needed for each tower are brought to site and distributed along the right-of-way where the towers will be built. Smaller poles are placed between the towers to support the transmission cables.
The types of transmission lines are: Overhead Transmission Lines. Subtransmission Lines. Underground Transmission Lines.