Why is it important to securely fasten rail joiners?

Securely fastening rail joiners is essential primarily to maintain track stability and prevent misalignment. When rail joiners are properly secured, they ensure that the rails remain aligned, which is critical for the safe and efficient operation of trains. Proper alignment prevents issues such as derailments and excessive wear on both trains and tracks, which can be costly and dangerous.

When rail joiners are loose, it can lead to gaps between rails, resulting in uneven surfaces that can create challenges for the smooth passage of trains. This can result in vibrations and jolts for both rolling stock and passengers, undermining the integrity of the rail infrastructure. Thus, fastening rail joiners is a preventive measure that enhances safety and reliability in rail operations.

While other aspects like aesthetic uniformity, friction reduction, and repair simplification might play a role in some contexts, the primary concern with rail joiners is their fundamental role in stabilizing the track structure during dynamic loading conditions created by passing trains.