Booted Sleeper Solutions

APTs booted sleeper pads can gain up to 10 dB in vibration isolation over the classic installations. The patented systems are easy to install and long time performance is ensured.

Principle

Undertie pads are effective for reducing structure borne noise and vibrations. The patented APT-BT systems for ballasted track are superior to other systems. They include elastomer pads with a low dynamic to static spring rate which are protected by a rubber boot against damage from tamping operations.
Their vibration mitigation performance is drastically improved by the use of a rigid layer inside the boot. This rigid layer is inserted under the elastomer pad. It ensures a homogeneous load distribution in the elastomer and hence an optimal functioning of the elastomer. This homogeneous load distribution cannot be achieved by a single elastomer pad resting on ballast.

Performance

average vibration reduction of 10 dB also when used with special trackwork, in comparison with ballasted track;
controlled vertical and horizontal rail displacements (below 1, 2 or 3 mm according to the system specifications);
long-time performance due to protection by rubber boot.

For more information about the product, please download our data sheet (APT_BT.pdf) or contact us here.