Reunakiskojen

Reunakiskojen, often translated as "edge rails" or "flange rails," refers to a specific component found in certain types of railway track construction. These rails are positioned along the outer edge of the sleeper or tie, supporting the running rails and preventing ballast from being displaced. Unlike the main running rails which carry the direct load of the train wheels, reunakiskojen are primarily structural and stabilizing elements.

The purpose of reunakiskojen is to enhance track stability and durability. By providing an additional support structure, they help distribute the forces exerted by passing trains more evenly across the ballast bed. This can lead to a reduction in ballast degradation and a longer lifespan for the track. They also play a role in maintaining the correct gauge of the track, ensuring the distance between the running rails remains consistent.

Reunakiskojen are typically made from steel, similar to running rails, and are fastened to the sleepers using clips or spikes. Their use is more common in specific track designs or in areas where enhanced stability is required, such as on curves, bridges, or at level crossings. The precise design and implementation of reunakiskojen can vary depending on the railway administration's standards and the specific track conditions. Their presence is a subtle but important feature in maintaining the integrity and safety of railway infrastructure.