
Tailor-made prefabrication
We believe that infrastructure can be developed without disrupting the city, which is why we have created a comprehensive prefabrication technology for key elements of tram, road, intermodal, and railway infrastructure. CONTRACK integrates design, prefabrication, and installation into a cohesive process, reducing disruption associated with construction works
and increasing control over the investment.
Technology
CONTRACK is a comprehensive prefabrication technology for infrastructure that transforms the way projects are delivered — shifting from fully on-site construction to a model based on pre-manufactured elements and their precise integration.
Key components are produced under controlled conditions, and then assembled on-site into a cohesive system.
The technology integrates large-format prefabricated reinforced concrete slabs with the steel components of track structures, using a polyurethane material for continuous elastic rail fastening. The result? Increased structural durability, greater predictability
of project execution, and improved control over every stage of the investment.

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From design to the installation of entire junctions.
Explore our offer for tram infrastructure.
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Fast and durable rail-road construction.
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Solutions for ports, terminals, and logistics centers.
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Durable solutions for heavily loaded road pavements.
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The possibility of creating elements precisely tailored to your investment.
Technological advantages
Instead of several weeks of concrete curing — just a few days to install ready-made prefabricated elements. The ability to remove worn steel structures without interfering with the reinforced concrete slab significantly shortens the duration of future maintenance works.
Prefabricated elements produced in a controlled factory environment, independent of external conditions, are characterized by higher initial quality and extended service life of the entire structure.
Standardized processes — from simple track sections to complex junctions — eliminate problematic interfaces between different technologies and reduce operational costs.
The durability of the slab is three times greater than that of the steel turnout structure. Over the lifecycle of the prefabricated slabs, up to three turnouts can be installed without the need to dismantle the concrete surface. This significantly reduces both the time and cost of maintenance works.
Reduced disruption for residents and road users. Better work organization and limited on-site intervention translate into fewer traffic disturbances and less impact on city life, while also lowering the costs of organizing alternative public transport.

Expertise
We combine our team’s many years of experience with modern design methods. Our own equipment, certified materials, and proven processes form the foundation of every project. CONTRACK was developed based on experience gained from hundreds of railway and tram projects
delivered by the KZN Bieżanów Group.
years of turnout manufacturing, installation, and replacement of hundreds of railway and tram turnouts
years of production of factory-assembled railway turnouts
logistics operations related to railway prefabricated elements
Our in-house design department, staffed with certified engineers, develops complete technical documentation tailored individually to each project.
Rubber-tyred gantry cranes, mobile PWP gantry systems, and SWITCHER wagons — technological independence ensures timely project delivery.
The key advantage of prefabrication is quality, which translates into high product durability. That’s why we place the highest importance on our Quality Management System.
An advanced work scheduling system combined with logistical expertise enables rapid-track reconstruction. See: Plac Zawiszy in Warsaw — completed in just 5 weeks.
How we operate
CONTRACK is a tailor-made technology. It includes the entire process — from design dialogue, through production and safe logistics, to efficient installation, and ultimately the possibility of easy replacement of steel structural components without affecting the reinforced concrete slabs.
As a result, the entire process is cohesive, predictable, and based on repeatable solutions that reduce risk and facilitate project management at every stage.
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Based on an individual design, even the most structurally complex large-format elements of tram-road, railway, intermodal, and road infrastructure are produced. CONTRACK prefabricated elements are tailor-made — manufactured to order with a strong focus on precision and adaptation to a specific project.
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Ready-made prefabricated elements are delivered to the site in accordance with the project schedule. Precise planning of transport and deliveries improves work organization. We use our own machinery fleet.
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The prefabricated element is installed quickly and precisely on a prepared subbase, using proven assembly technology and fast-setting materials. The entire process — including connection and adjustment of installations — can be completed in as little as 72 hours, i.e. within a single weekend.
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CONTRACK technology enables the replacement of the steel part of a turnout without interfering with the prefabricated reinforced concrete slabs, whose durability is up to three times greater than that of steel. The solution allows for efficient replacement of worn components — from switch blades to the entire track system — with works carried out in a weekend mode, in approximately 72 hours.
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