Rail Pads and Base Plate Pads

Address: Calenberg Ingenieure GmbH, Am Knübel 2-4, D-31020 Salzhemmendorf Phone: +49 (0) 5153 9400-0 Connect: Website: View website Contact: Contact supplier View: View supplier Download: Download

Calenberg Ingenieure

Elastic Rail Pads and Base Plate Pads for High-Speed Traffic and Conventional Lines

Our rail pads and base plate pads reduce any vibrations and structureborne sound produced in modern track bed structures. The perfect emission protection for your projects.

Reduce High Stress Loads with Elastomers

When trains travel past, they cause vibrations and structure-borne sound due to the moved load, rough surfaces on wheels and rails, and local oscillations in the track assembly stability. In such cases, highfrequency impacts are primarily due to vehicle and track system interactions (discrepancies in wheel ovality, ripples, incorrect track positions, rail corrugations and similar) while low-frequency impacts are caused by wheelset loads, travel speed, and carriage, axle and bogie gaps.

This largely characterises the load on the overall system. Using highly elastic materials such as special microcellular EPDM, natural rubber and CR composite materials in vibration-optimised bed structure shapes can efficiently limit vibrations entering the sub-structure on a permanent basis.

Cost Reduction and Track Bed Structure Protection Using Rail Pads and Base Plate Pads

Our elastomer bearings for track fastening systems optimally meet the requirements of modern railway tracks on a permanent basis. Featuring our highly elastic elastomers made of microcellular EPDM and with a very wide spring rigidity range to minimise structure-borne sound from track vibrations, our products help to greatly reduce loads in track bed structures. This protects the overall track structure system, thus reducing our clients’ costs for maintenance and repair immensely.

Installing elastic or highly elastic rail pads and base plate pads in special fastening systems makes use of the load transmission in rails. The acting forces are distributed across several support points in the triggered wheel load, so that the stress on the directly affected rail support point is greatly reduced.

Noise is also produced by factors such as friction resistance, uneven surfaces, ripples and rail corrugations and by the related vibrations caused by trains passing over. Noise is reduced to a minimum if the railway vehicle and railway lines are in good working order. Using elastic rail pads greatly reduces the impact of high-frequency vibrations transmitted into the ballast bed through the rail and sleeper. This counteracts shattering of ballast.

Protect Track Bed Structures with Calenberg.

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High Performance Rubber Material for Long-Life Tracks

For decades, Calenberg Ingenieure has been conducting research in the field of elastomeric materials technology and is a solution provider for elastic component mounts in the fields of construction, industry, the environment and railways. The product range comprises special elastomer materials for special fields of application in sound and vibration insulation and reduction. Calenberg expertise reduces the risk of building damage thereby reducing maintenance costs, improves the living quality and protects against environmental effects such as traffic noise, vibration and impact sound. All activities of Calenberg Ingenieure are scientifically based and the physical measured values and data of the products are approved by official and independent institutes. Constant research and development, over 45 years of experience and certified quality management is the reason for choosing Calenberg Ingenieure for successful projects at home and abroad. Rail traffic causes airborne noise as well as vibrations or structure-borne sound. Residential and commercial locations are normally the sufferers of these emissions. Calenberg elastomeric bearings are produced from high grade natural and synthetic rubbers. Due to the different variants within the product range, individual solutions for nearly every vibration and noise problem can be offered.

Elastomeric Track Mats and Ballast Mats

Why are there vibrations on the track? Wheels are noncircular, eccentric, unbalanced and have flat areas. The rail track is not perfectly straight and even due to the construction method and due to subsoil conditions. The track which has integrated vibration control offers an effective relief. At this point an elastomeric track mat or under ballast mat can be an important part e.g. of a floating­­ slab track or mass spring system. It also has the big advantage of increasing the durability of the track system, which reduces the maintenance costs of the track as well as of the rolling stock. The different USM types are manufactured from high-quality rubber compounds. They are mechanically highly resilient and permanently weather-resistant. The mats are also characterized by very low water absorption and high electrical insulation resistance and allow drainage at the mat level. The USM series is equally suitable for ballasted track and slab track systems.


Rail Pads and Baseplate Pads

Micro cellular elastic EPDM rail pads and base plate pads

Both are important resilient parts of rail fastening systems. Rail pads are installed directly under the rail foot to increase the elasticity of the ballast track. This brings about a more comfortable ride and protects the permanent way, from standard gauge railway to tram way as well as in varying dimensions.


The elasticity to slab track systems is brought about by high elastic micro cellular EPDM base plate pads installed between rib plate and concrete slab, reducing vibrations caused by track and wheel unevenness.


Elastic rail pads and base plate pads in local public transport

Rail pads and base plate pads in the high-speed sector and on conventional lines

USM® products

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