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Shear Key Bar

Seismic restrainer systems for bridges & viaducts

Shear key and hold down bars are a special application of Post-Tensioning smooth bar systems where a full assembly acts as a permanent seismic restrainer for the connection of elevated metro/roads precast segments. The core accessories of the system are:

  • High tensile bar with threaded ends.
  • Swivel nuts.
  • Swivel plates.
  • Corrosion protection accessories.

Dextra can also provide the jacking service, consult us for more information.

Product Features

Full system

Dextra provides a full comprehensive system including rod, plane and nuts.

Clean solution

No grouting, no chemical. Only high-pressure water is required to expand the tube.

Instant support

Once expanded, the tube provides its full support, letting you continue the excavation right away.

Related Projects

Causeway across Kuwait Bay (Jaber Causeway)

Causeway across Kuwait Bay

The Main Causeway across the Kuwait Bay is a 36-km long project currently being built North of Kuwait City. It will ultimately be connected to Doha Link, another sea link project West of Kuwait City, which connected make together the Jaber Causeway sea link

Doha Link (Jaber Causeway)

Doha Link (Jaber Causeway)

Doha Link is a marine bridge project currently being built West of Kuwait City. It will ultimately be connected to Main Causeway Across Kuwait Bay, another sea link project North of Kuwait City, which connected make together the Jaber Causeway sea link, one of the largest civil engineering project ever built in the Middle East.

West Gate Tunnel

West Gate Tunnel

The West Gate Tunnel Project will deliver a vital alternative to the West Gate Bridge, providing a much needed second river crossing, quicker and safer journeys, and remove thousands of trucks from residential streets.

Related solutions

Solid rockbolt made of composite material. Recommended for face bolting.

Cuttable FRP hollow rock bolt acting as a grouting pipe. Ideal for face bolting.

3 in 1 concept: Self-Drilling Rock Bolt acts as a drilling rod, as well as an anchor bar and a grouting pipe.


At every moment of your customer journey, Dextra teams dedicate themselves to the production of smart construction solutions that allow our customers to reach higher productivity and safety levels on their construction sites.

Dextra holds physical stocks on several continents, complemented in each country by the local inventories of our distributors. With this extended network, Dextra makes sure our products are always at reach no matter where our partners are.

For solutions that require to be customized, Dextra can also go beyond our standard delivery times and offer accelerated delivery schemes. Consult us for more information.

From 3 major industrial sites located in Bangkok (Thailand), Guangzhou (China), and Pune (India), Dextra completely owns its manufacturing facilities and processes. This allows us to have complete control over the timing of our operations and the quality of the solutions produced.

An independently accredited material testing laboratory, accredited to ISO-IEC17025, is located at Dextra’s main Bangkok factory, allowing the testing of material and products.

Dextra aims to supply products that exceed the most demanding international technical approvals and it is our goal to create maximum customer satisfaction by complying with our clients’ needs and specified requirements.

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