Product Overview
The TENSA®FINGER Type GF expansion joints by mageba are designed for bridges with heavy traffic and movement ranges from 120 mm to over 1,000 mm. These joints feature steel edge profiles and finger plates that are prestressed by springs to prevent uplift, ensuring durability and reliability.

Design and Functionality
The sliding finger plates act as simply supported beams, transferring traffic loads with minimal moment effect. They are equipped with plastic bearings and high-strength bolts, with sliding pads moving on stainless steel or GRP sheets. Special springs maintain constant downward pressure, preventing protrusion and damage.

Noise Reduction and Surface Profiling
The interlocking finger design minimizes noise by maintaining constant wheel contact, making these joints suitable for noise-sensitive areas. Optional surface patterns enhance vehicle grip, improving safety.

Drainage System
A watertight drainage channel beneath the joint, made from EPDM, PVC, or stainless steel, connects to the bridge's drainage system. It can be easily cleaned and optionally features a dirt-repellent surface.

Material Properties
High-quality materials include S235 steel for edge profiles, polyamide for bearings, and stainless steel for sliding sheets and springs. Corrosion protection follows ISO 12944 or national standards.

Dimensions and Types
The joints are available in various types with movement capacities ranging from 120 mm to 1,000 mm. Each type has specific dimensions and weights, with larger movements available on request.

Quality Assurance
mageba's quality system is ISO 9001:2008 certified, with frequent inspections by independent institutes. The joints have undergone extensive testing, meeting standards like the Austrian RVS 15.45.

Installation and Support
Pre-assembled in the factory, the joints are installed by mageba technicians. Related products like ROBO®DUR and STATIFLEX® enhance joint performance. Customer support is available for project-specific advice and quotations.

Reference Projects
Notable projects include the Audubon Bridge (USA) and Europe Bridge (AT), showcasing the application of TENSA®FINGER joints.