Steel Combination Bolt

Lattice Girder

An immediate roof support for tunneling systems

GEOTEC™ lattice girder systems are lightweight, three-dimensional curved steel frames which are composed of main bars, secondary bars, connection plates, foot plates and stiffeners.

The lattice girder can provide immediate support for tunneling environments.

The radius of the bending is tailor-made to meet each project’s demands.


Product features

  • Two types of design: 3-bar or 4-bar, for different force requirements.
  • Flexible design with different dimensions available.
  • Entirely integrated in the shotcrete lining.
  • Avoid porous zones and shotcrete spray shadows.



Immediate support
Immediate support
in the area of the tunnel face
Simple and fast
Simple and fast
installation without the need of major equipment
Engineering support
Engineering support
from Dextra professionals


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

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Network & Services

Network - Dextra holds physical stocks on several continents, complemented in each country by the local inventories of our distributors. With this extended network, Dextra make sure our products are always at reach and available in reasonable times.

Delivery - For solutions which required to be customized for each project, Dextra can also go beyond our standard delivery times and offer accelerated delivery schemes. Consult us for more information.

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Manufacturing capabilities

From 3 major industrial sites located in Bangkok (Thailand), Guangzhou (China) and Mumbai (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.

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Testing facility

An independently accredited material testing laboratory, accredited to ISO-IEC 17025, is located at Dextra’s main Bangkok factory, allowing the testing of material and products.

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Quality & Certifications

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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