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Deep Foundation – old

Deep Foundation

For crosshole sonic logging (CSL) testing

Crosshole sonic logging (CSL) is a method to determine the structural integrity of drilled shafts and other concrete piles. Sonitec is the only steel pipe system specifically designed and manufactured for this testing method.

For micro and mini piles

By definition, micro and mini piles are respectively less than 300mm and 1,000mm of diameter. These narrow-profile foundations require high steel grade reinforcement bars to develop the strength with minimum space. Micropiles based on fully-threaded bar systems are the best answer to this need, and come even in “Double Corrosion Protection” (a.k.a DCP) for permanent structures or aggressive grounds.

For macro piles

The fastest and safest way to splice steel cages for deep foundations is by using rebar couplers (see solutions). To complement our rebar splicing offer for foundation piles & cages, Dextra also supplies solutions for the concrete integrity testing of foundations, which is usually required. The most common way to proceed is by “Cross-Hole Sonic Logging” using probes together with Sonitec™, a thin-wall steel pipe system featuring a push-fit assembly.

Deep Foundation

Sonitec is a tube solution invented to facilitate the integrity testing of foundations using the CSL testing method.

Compact high-performance mini-pile system to minimize bore holes diameters.


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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