Expansion joints mageba modular expansion joints – the benchmark for large movements TENSA®MODULAR Types LR and LR-LS proven, versatile, low-noise

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

Expansion joints Client benefits Highlights • Allows free movements in all directions and rotations about every axis • Completely watertight system with drainage at the bridge surface • Versatile and freely adaptable to suit client‘s wishes • Can be used on all types of bridges • Based on well-proven and thoroughly tested components and parts • Low-noise when fitted with sinus plates • Welding is avoided in all highly stressed connections, increasing durability. • All parts of the joint are elastically prestressed, making them highly resistant to fatigue. • All of the joint’s well-proven wear...

Expansion joints Movement capacity Movements of the joint Skewed orientation and movements mageba TENSA®MODULAR expansion joints allow movements in every direction and, at the same time, rotations about every axis. Their elastic control system can accommodate large transverse and vertical movements without developing constraint forces. Expansion joints are typically installed perpendicular to the bridge’s axis, with their longitudinal movements parallel to the same axis. But it is also possible to design modular joints for installation with a different orientation (i.e. not perpendicular to the...

Expansion joints Design details Support and connection system Control system The joint’s lamella beams are connected to the support bars beneath by stirrups through which the support bars pass. In the same way, the support bars are enclosed by support bar boxes at the edges of the joint. In this way, the whole system is supported and connected elastically and securely, while still allowing movements as desired. Elastomeric springs control the movements of the individual lamella beams and make them work as a single kinematic system. The movements of each lamella beam relative to its neighbours...

Expansion joints Testing & optional features Laboratory testing The TENSA®MODULAR expansion joint has proven its worth in testing by independent institutions on many occasions. For example, the durability of the joint was verified in testing with 6 × 106 load changes, after which no signs of fatigue could be established. The optional FUSE-BOX feature protects the modular expansion joint and adjacent bridge structure from seismic damage. If a standard joint (without FUSE-BOX) closes more than geometrically allowed during an earthquake, the joint and bridge structure will be damaged or could even...

Expansion joints Materials & installation Materials The following high-quality materials in particular are used as standard for the manufacturing of TENSA®MODULAR expansion joints: In particular, the installation of very large TENSA®MODULAR expansion joints should be supervised by a mageba specialist. Before installation, the bridge gap width and temperature are checked by the contractor, and the joint’s presetting value is adjusted as appropriate. The joint is then levelled against both edge profiles. • Lamella beams and support bars of S355 steel; hybrid lamella beams including stainless steel...

Expansion joints Quality & support Related products The following mageba products can be used in combination with TENSA®MODULAR expansion joints: The 100 % watertight modular expansion joint was invented by mageba in the 1960s. For five decades, mageba TENSA®MODULAR expansion joints have proven their worth in thousands of structures under the most demanding conditions. In addition to the product properties, the extensive experience of our well-qualified manufacturing and installation staff also contributes to the product’s high quality and durability. • ROBO®DUR: Strengthening ribs of special...