KRAIBURG PuraSys, as part of the KRAIBURG Holding, specializes in sub-ballast mats, bearings for mass-spring-systems and other special elastic supports made of polyetherurethane in the railway superstructure. KRAIBURG PuraSys has already successfully established itself on the international market through numerous projects with its PU products for solving noise and vibration problems caused by rail traffic. KRAIBURG PuraSys is of course ISO 9001 certified and thus guarantees high quality and complete traceability of its products. PuraSys PU elements are tested according to DIN 45673-5, DIN 45673-7 and other national as well as international standards. Quality products – produced in harmony with nature Environmental protection is a key strategic task at KRAIBURG PuraSys. We are fully aware that sustainable growth is only possible if we live up to our commitments and responsibility for environmental protection. That is why KRAIBURG PuraSys has a consistent course here: environmental protection is our daily program!

Sound emission and immission – Noise sources due to railway traffic Railway vehicles generate rolling noises and vibrations during operation. This is due to roughness and imbalances on both the wheels and the rail running surfaces. Surface defects such as head checks, corrugations and slip waves on the rails are known to be among the most common sources of interference. These vibrations are transmitted to the ground via the roadway and spread as structure-borne noise. If buildings are located along or near the track, a transfer is also carried out via their foundations. The buildings begin to vibrate and, with the appropriate intensity, they are also preceived by humans as perceptible vibration or disturbing noise. Another consequence of this transmission chain is the emission of vibrations from building parts, e. g. ceilings and walls, to the environment. This takes place via the air, which begins to vibrate itself and then become audible as socalled secondary airborne sound.