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Vibration absorbers are produced in several configurations SINGLE TUBE VIBRATION ABSORBER for pull and push absorption at random mounting positions. The length is increased to keep the diameter dimension at a minimum. TWIN TUBE VIBRATION ABSORBERS for pull and push absorption. The preferred mounting position is vertically aligned. Compared to single tube absorbers, the length is decreased, while the diameter is enlarged. The characteristic of damping for both types can be progressive or degressive. (Detailed information concerning application and calculation can be found in the VDIGuideline VDI 3833 Bl.1+2 – German Association of Engineers Guideline.)

The BL 45A/F barriers are from the technology of the BL 4x range and are associated with accessories recommended by the French Tunnels Study Centre (CETU). The BL 45A/F barriers are particularly suited to securing roads such as bridges, tunnels, crossings, mountain passes, etc. Main benefits: Closing off wide lanes Low maintenance costs Investment for long life cycle Pivoting base The pivoting base positions the barrier parallel to traffic lanes to facilitate drive and periodic tests without affecting traffic. This device also limits damages caused by a slight shock by freeing the barrier's rotation via the failure of an adapted part. Position sensors indicate the housing position. Automatic locking The boom remains locked in the open position thanks to a robust mechanical system allowing a firm locking of the arm. This functionality guarantees that the boom is held in the open position even in strong winds. Applications: Traffic management Bridges and tunnels