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

Expansion joints 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. 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 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 Design • Welding is avoided in all highly stressed connections, increasing durability. • All of the joint's well-proven wear parts are bolted in place, and can be replaced if necessary with little effort and without...

Expansion joints Movements of the joint 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. If necessary, the joint's support bar boxes can be designed with a trapezoidal shape to increase the joint's transverse movement capacity to match its longitudinal movement capacity. In this case, the support bars of the joint can rotate until they are orientated at 45 degrees to the bridge axis. This simple geometric...

Expansion joints Design details Support and connection 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. ROBO®SLIDE sliding material Where sliding components are subjected to demanding loading or movements, ma-geba uses ROBO®SLIDE, a highly developed modern alternative to the traditionally used PTFE. This...

Expansion joints 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 x 106 load changes, after which no signs of fatigue could be established. All critical components and their materials, such as elastomers and sliding surfaces, were also subjected to individual testing. In an Opening Movement & Vibration (OMV) test as defined by American standards, the joint proved its suitability in a programme which simulated a 100-year service life - and specifically,...

Expansion joints Materials & installation Materials The following high-quality materials in particular are used as standard for the manufacturing of TENSA®MODULAR expansion joints: • Lamella beams and support bars of S355 steel; hybrid lamella beams including stainless steel can be provided on request • Sinus plates of S355 steel • Sealing profiles of EPDM or CR • Control springs, sliding springs and sliding bearings of elastomer, PTFE and polyamide • Special high-grade sliding material ROBO®SLIDE for sliding bearings and sliding springs in particularly demanding circumstances Corrosion protection The...

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...