USM 1000 W, USM 2000 + 3000


Calenberg track bed and sub-ballast mats (max. length 200 m) are made of synthetic and natural rubber and are available in various designs and rigidities for use at all train speeds and with axle loads up to 250 kN. These mats produce an effective reduction in vibration emissions from railway traffic.

The USM models are manufactured using high-grade rubber blends. They have a high mechanical load capacity and are permanently weather-resistant. The mats absorb virtually no water, excel thanks to their high electrical insulation resistance and provide drainage on the mat level.

The USM series is suitable for both ballasted and ballastless track systems.


  • Reduction in stress load on the ballast
  • Increased long-term stability for the track position
  • Reduction in the dynamic wheel forces
  • Reduction in the track and vehicle stress load
  • Potential for reduction in ballast height – important on bridges
  • Reduction in track maintenance costs
  • No replacement required thanks to high fatigue strength
  • Expected service life min. 60 years