Modular expansion joints – TENSA-MODULAR LR-LS


mageba TENSA-MODULAR multiple-gap expansion joints can accommodate movements in every direction and rotations about every axis. They can be used for longitudinal movements of as little as 160 mm, or for very large movements of well over 2,000 mm. The total movement of the bridge deck is divided among a number of individual gaps which are created by horizontal surface beams. The individual gaps are sealed by watertight elastomeric profiles, and surface beam movements are regulated by an elastic control system. The drainage of the joint is via the drainage system of the bridge deck. Type LR-LS joints feature so-called “sinus plates” on their surface, which reduce noise from over-passing traffic by up to 80%.


TENSA-MODULAR expansion joints are used when the movements of a bridge exceed the capacity of a single gap joint. The watertight system, which was invented by mageba several decades ago, is designed on a modular basis and can be tailored to satisfy the specific requirements of almost any structure.

      • mageba modular expansion joint

      • Seismic testing modular expansion joint

      • Noise reduction for modular expansion joint

      • The journey of an expansion joint

      Image gallery


        Installed 24-gap joint allowing 1,920 mm of movement and weighing 41,000 kg


        Control system with control springs and connection plates


        Installation works on the Run Yang Bridge


        Transverse movement capacity of the joint


        Vertical movement capacity of the joint


        Fatigue testing of an LR joint


        Seismic testing of an LR joint


        FUSE-BOX during an earthquake

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        Transport of a modular expansion joint

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        Installation of a modular expansion joint

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        Storebaelt West Bridge, Denmark - equipped with TENSA-MODULAR expansion joints of type LR15