Pole types

Steel Tubular Poles

Cold-swaged tubular poles

Made from prefabricated black or galvanized steel tubes. The larger tube end is cold-swaged over the smaller one with a swage length at least 2× the larger tube’s diameter. The swaging force creates a tight interference fit that provides high bonding strength capable of carrying static and dynamic loads.

Key features:

Lower wind load: The cylindrical profile reduces wind loading to about 60% of an equivalent flat surface.
Higher robustness: The round shape and uniform mass distribution increase stiffness and load capacity.
Greater corrosion resistance: Smooth surfaces with no pockets for water accumulation reduce the likelihood of rust.
Easier installation: Lighter weight and simpler erection/assembly.

British specifications for tubular poles

Categories: Poles are classified into four categories: A, B, C, D.
Steel grades (per DIN 17100) by minimum tensile strength:
- St37: ≥ 370 MPa
- St44: ≥ 420 MPa
- St52: ≥ 520 MPa
Nominal (overall) pole length: The total end-to-end length of the tubular pole. Standard manufactured lengths: 9.0 m, 10.0 m, 11.0 m.
Minimum swage length: At least 2× the diameter of the larger tube.
Special orders: Poles can be manufactured to customer-specific requirements.

Lattice Poles

Latticed poles are used in medium- and low-voltage electrical networks. They serve as links between main substations or as supports for mounting customers’ distribution transformers.
They are made from hot-rolled steel sections, assembled to the client’s specifications, and punched according to a drilling pattern that meets the client’s requirements.
Produced in lengths from 9 to 16 meters.
Surface treatment is provided according to the client’s requirements.

High Tension Power Transmission

Overhead high-voltage power transmission lines:

these towers are manufactured for lines operating at 66, 132, and 400 kV.