The system incorporates a resilient pad offering a second level of elasticity under the sleeper block.

Sleepers can be ‘tuned’ to the specific performance requirements of the project and are available in either twin block, monoblock or switches and crossing bearer configurations.

SATEBA UK supplied around 70,000 Twin Block Booted Sleepers (S312) and 5,000 Monoblock Sleepers (M312), previously called HAS) for their innovative vibration mitigation properties to the Elizabeth Line (Crossrail).

The sleepers are primarily designed to attenuate noise and vibration whilst generating savings on both the track construction costs and programme.

The HAS (now M312) was the result of a 10 year investment programme to develop a cost effective alternative to traditional floating slab track.

• This reinforced twinblock sleeper provides various levels of vibration mitigation performance (5db – 15db).
• A complete, cost effective installation and maintenance solution.
• Can be adapted to any type of sleeper: twinblock, monoblock or bearers, and any type of fastening.
• Suitable for high speed, mainline and urban lines.
• Installed on High Speed 1 (CTRL) and Elizabeth Line (Crossrail).
• Approved by Network Rail with Certificate of Acceptance PA05/06822.

• This prestressed monoblock sleeper provides an extremely high level of vibration mitigation performance (> 20db).
• A cost effective alternative to Floating Slab Track as it provides the same level of performance but can be installed up to ten times faster!
• This innovative sleeper is the result of extensive research and testing at the SNCF Track Research Centre (patent Sateba/Alstom).
• Suitable for high speed, mainline and urban lines.
• Installed on the Elizabeth Line (Crossrail).