Knowledge base

Rail knowledge from the field

Background to the issues we work on every day: what happens in the track, which solutions exist and how they perform in practice. Written by our engineers, without the sales pitch.

Track geometry

Hanging sleepers: causes, consequences and solutions

Where sleepers come loose and hang, why the settlement returns after every tamping run, and what a void of 1–2 mm does to the forces in the track: the approaches side by side, from tamping machine to adjustable fastening.

Updated Aug 2026 · 8 minRead the article
ERTMS

Balises and derailment: the vulnerable spot in the track

A derailment provision catches derailed wheels, but around an ERTMS balise the steel has to give way. Why that metal-free opening must remain 650 mm, and how the unguided opening can still be reduced.

Updated Aug 2026 · 4 minRead the article
Cables & ducts

Cables across the track: options and pitfalls

Track-crossing cables traditionally sit in a cable duct between two sleepers, exactly where the tamping machine needs to work. The options side by side: working around it or taking the crossing out of the ballast bed.

Updated Aug 2026 · 4 minRead the article
Rolling stock

Wheels, axles and drivetrain: where the quality lies

Forging from vacuum-degassed steel, heat treatment and standards such as EN 13262 and EN 13261: what determines the service life of wheels, axles and cardan shafts.

Updated Aug 2026 · 5 minRead the article

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