TENSA®MODULAR Types LR and LR-LS proven, versatile, low-noise

TENSA®MODULAR expansion joints are based on the following concept: The

movement gap at the end of a bridge deck is divided into smaller individual gaps by horizontal lamella beams. This enables deck movements of well over 2,000 mm to be accommodated. Rotations about every axis can also be facilitated. The individual gaps are sealed watertight by elastomeric profiles, enabling the joint to be completely drained at the deck surface. The movements of the lamella beams relative to each other are regulated, elastically and constraint-free, by a control system. mageba TENSA®MODULAR expansion joints are typically used in bridges with movements of over 80 mm. The fitting of so-called “sinus plates” to the joint''s surface enables noise from overrolling traffic to be reduced by up to 80 %.

Characteristics

Expansion joints are subjected to considerable demands and must satisfy these over a service life of many years. The design of the watertight ENSA®MODULAR expansion joint, which was invented by mageba, has been continually developed in recent decades. The current 4th generation of

the system fully accommodates these high demands. The TENSA®MODULAR expansion joint was developed, as the name suggests, as a modular system, with joints for specific needs built up from proven components. The principle variable in this process is the movement range which must be accommodated.

Each individual gap of the joint, and its sealing profile, allows maximum gap openings of between 60 and 80 mm, depending on the relevant norm. However, if noisereducing sinus plates are bolted to the upper surface of the lamella beams and edge profiles, the movement accommodated by each gap increases to 100 mm. For special load cases such as earthquakes, yet larger

movements can be facilitated. The maximum joint movement is used to determine the number of gaps and lamella beams that the joint will require