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TENSA®FINGER GF – Sliding Finger joints

The mageba GF Sliding Finger Construction is a robust Finger Expansion Joint for high requirements with regard to moveability (up to 1,000 mm), riding comfort and durability.

Design Principle

The TENSA®FINGER GF sliding finger joint is a robust finger roadway joint for high performance requirements imposed by traffic loads, movements, driving comfort and durability. Pre-stressed and finger-like supported joint plates allow vertical movements and twists of bridge components.

Construction Characteristics

  • Construction with low noise and high riding comfort.
  • Massive steel construction with a determinate system.
  • Anchorage and steel angles as watertight connection tested and proven over decades .
  • Thanks to modular construction, easy replacement of finger plates.
  • Easily adaptable to different pavement thicknesses.
  • Good grip of surfaces for higher traffic safety.
  • Construction rated for movements up to 1000 mm and more.
  • Rotation (fy) and vertical movement (ez) possible thanks to jointlike support.

Materials and corrosion protection

The following materials are used for the production of sliding finger joints:
  • Construction of S 235 JRG 2 with 3.1 B certificates
  • Bearings and sliding plates made of Nylatron
  • Helical springs, bolts and nuts of special high grade chrome steel
Corrosion protection:
  • Standard: sandblasting SA 3, hot-galvanizing 50 µm and 2 conversion coatings of 40 µm each
  • Corrosion protection possible according to customer needs


A large number of sliding finger joints have been used successfully for many years under tough traffic conditions. Basis for quality and durability are:
  • Qualified and experienced personnel
  • Process-oriented quality system (ISO 9001:2000 / EN 29001)
  • Professional installation on the bridge

Tests and approvals

  • Three complete test samples of the system GF 600 were tested at the largest finger span position and top loads of up to 160 kN with load alternation of 2 x 106 and a test frequency of 3,2 Hz with no damages.
  • A sliding test of over 5000 m under tough test conditions proves the superior qualities of sliding partners.
  • mageba sliding finger joint have successfully passed all tests in accordance with the Austrian directive RVS 15.45 and have been approved for installation in state highways and national roads.

Offered by


Schönberg im Stubaital, Tyrol, Austria, Europe - Patsch, Tyrol, Austria (1963)

Saint Francisville, West Feliciana Parish, Louisiana, USA, North America - New Roads, Pointe Coupee Parish, Louisiana, USA (2011)

Jena, Thuringia, Germany (2006)

Traismauer, Lower Austria, Austria (2011)

Staten Island, New York, New York, USA, North America - Bay Ridge, Brooklyn, New York, New York, USA (1964)

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