mageba TENSA-FLEX sliding finger joints are bridge expansion joints for movements of up to 800 mm. They consist of steel finger plates and counter pieces vulcanized in durable elastomer. The finger plates are pre-tensioned downwards as a result of a slight inclination at installation, and therefore maintain constant contact with the counter pieces at the opposite side of the bridge gap. This prevents them from protruding above the driving surface due to bridge settlements or rotations. The finger plates are non-rigidly secured to the bridge by anchor bolts, reducing the effect of moment loading on the structure. The orientation of the fingers, in the direction of vehicle travel, reduces noise emissions and increases driver comfort.
TENSA-FLEX RC sliding finger joints are suitable for use under heavy traffic. Their special doweled connection system makes them particularly useful where the impact on the main structure should be minimized. The system is designed on a modular basis, which allows individual finger plates to be quickly replaced as required.