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Modular joints

TENSA-MODULAR LR-LS

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Expansion joints

Principle

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 120 mm, or for very large movements of well over 2,400 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%.

Applications

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.

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Installed 23-gap joint with sinus plates allowing 2,300 mm of movement.

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A fully installed TENSA®MODULAR expansion joint with noise-reducing sinus plates and "Quick-Ex" system that enables the easy replacement of the joint

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8-gap modular expansion joint with sinus plates being lifted in its recess

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The wheels of over-rolling vehicles maintain constant contact with the expansion joint’s surface, eliminating the noise caused by impacts with the gap edges

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Control system with control springs and connection plates

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Transverse movement capacity of the joint

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Vertical movement capacity of the joint

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FUSE-BOX during an earthquake

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Fatigue testing of an LR joint

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Seismic testing of an LR joint