Underground construction

We design and manufacture specialized equipment for excavation and concrete works in road, railway, and metro tunnels. With nearly 80 years of experience in underground mining, we guarantee top-quality solutions.

Support for tunnel construction

OSTROJ has a long history of developing and producing technology used in major underground projects – from Prague metro stations to the Strahov Tunnel. Today, our focus is on mobile steel formwork for concrete casting, rebar carriers, work platforms, and other specialized underground construction equipment.

Each product is not only designed but also manufactured and assembled in-house. We provide support for equipment modifications to fit various tunnel profiles, offering multifunctional solutions tailored to customer needs—reducing costs and project timelines.

With our in-house design, manufacturing, and assembly capabilities, we ensure uncompromising safety and quality.

Our customers

Why choose OSTROJ?

Unique technical solutions

We are the only manufacturer of mobile formwork systems in Czechia and Slovakia.

In-house production

From development to quality control, everything happens under one roof.

Cutting-edge technologies

Robotics, virtual reality, 3D printing, and skilled manual craftsmanship.

Customer service

Assembly, expert consulting, post-warranty service, and general overhauls.

On-site assembly

Our machines and equipment are created directly at OSTROJ in Opava, where we control the entire production process – from the initial design to the final assembly. For highly specialized parts, such as sophisticated electronic components or software, we rely on partnerships with companies that share our commitment to quality, precision, and innovation.

We provide both warranty and post-warranty service, continuous technical support, and professional on-site installation at the customer's location. To ensure smooth commissioning, we also offer operator training, ensuring everything runs efficiently from day one.

Thorough technical inspection

The zero-defect strategy is our standard. Thanks to modern quality management systems and technical inspection, we ensure precision throughout the entire production process. We are equipped with state-of-the-art 3D measuring stations and advanced non-destructive testing methods.

Pressure testing
Balancing
Dimensional inspection – 3D measurement
Non-destructive testing of internal welds using ultrasound
Non-destructive testing of internal welds using magnetic testing
Comparative analysis – augmented reality
IWE/EWE welding supervision

Tailored financing

Every project has its specifics, and investing in dedicated equipment is not always necessary. We always strive to find the most effective solution with our customers, and in addition to sales, we also offer buyback options for equipment. This model can be a more cost-effective choice, especially for shorter tunnels.

Our power in your hands

ostrojtechnology.cz

We design and manufacture technologies tailored to our customers' challenges. Explore specific equipment in our online catalog.

References

For nearly 80 years, we have been manufacturing equipment for work both above and deep below the surface. Explore our reference projects.

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Zdeněk Slavík
Sales Representative

OSTROJ a.s.
Tesinska 1586/66
746 01 Opava, CZ