A specially designed steel pole is used for the high-voltage lines of the railway. Poles made of concrete and wood are also used, but to a lesser extent.

The pole is constructed to bear the weight of crossarms and lines. It is dug deep into the ground for stability. In cases of significant stress, particularly in the longitudinal direction of the track, it may need to be supported by struts or braces.

For overhead lines over a single track, line poles are used, reaching a height of 7.2–8.1 metres above the top of the rail. In yards with multiple tracks, lattice bridges are used on bridge poles with heights ranging from 8.75 to 9.75 metres above the top of the rail. The steel poles are protected against corrosion either by paint or by hot-dip galvanizing.

The overhead line poles in the exhibition are from the Iron Ore Line between Riksgränsen and Boden.