Lightweight steel structure modern building methods

Lightweight steel structures produced by Unic Rotarex®Unic Rotarex® is the name under which we offer modern building methods based on lightweight steel structure.

We produce load bearing structures for residential and industrial buildings with high level of precision and prefabrication. We develop building methods specific for each type of climate.

We have split our know-how in four base categories: design, production, assembling and building methods. The ones interested can receive the right to use our know-how trough collaboration agreements, association or by buying. We can collaborate in one, several or all categories.

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About us

Our age

We are together for 23 years.

23 years with Unic Rotarex the LSF Factory

Our story

Lightweight steel structures factory Unic RotarexOne day Rota, the screw, associated with Rex, the profile. Together they founded the Light Steel Structure Factory RotaRex.
They looked grey, however, they were green thinkers. Therefore they decided that it is better to melt their old cars and transform them into steel houses, rather than cut the trees.
As a result, they filled the world with revolutionary structures and they were followed by many others. 😊

Our portfolio

Over 200 buildings in Europe and also in other countries.

Our products

Lightweight steel structure for residential buildings

Load bearing structures for residential buildings produced by Unic Rotarex®This is the technology that will be used for future buildings. However, it is nothing new, we just improved the wood framing system by using galvanized steel cold formed profiles. They have a higher prefabrication and precision level. The joints between the steel profiles are more resistant that the wooden ones, which use OSB or plywood plating for load bearing. In our case, the structure is ready to take in all load bearing efforts and the OSB only brings a supplementary contribution.

Our engineers design the structures with computer assisted software and export it to the production line resulting structural elements in the most diverse shapes. Besides, the assembling is easily done on site based on the 2D and 3D plans using self drilling screws. The materials used in association with our structure are well known building materials, therefore they can be found at retailers from your area. The following works are very well known works for all builders.

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Lightweight steel structure for industrial buildings

Load bearing structure for industrial buildings produced by Unic Rotarex®After many years we are the first ones to reduce the material consumption per square meter with over 25% for industrial buildings with 15m free span and 6m height. An important reduction which reflects in the price.

Lightweight structural elements, most of them manually assembled. In order to lift the roof trusses for a 750 sqm industrial building the lifting equipment is needed just for one day. If you think how many hours of lifting equipment are needed in the classical building methods, you will identify one more important price reduction.

The pillars are fixed in the concrete slab of the foundation with mechanical and chemical anchors. Furthermore, because our system doesn’t need anchor bolts fixed to foundation, any specialist will understand what a great time and price reduction this means.

The structure of a 600 sqm industrial building can be produced and assembled in 10 days.

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Our know-how


Design of lightweight steel structures at Unic Rotarex®How the technical documentation is drawn for residential and industrial lightweight steel structures.

Design, 2D and 3D statical analysis, materials used, applicable legislation, norms, structural material consumption and templates.



Lightweight steel structures production at Unic Rotarex®Galvanized lightweight steel structures production. Machines needed, organizing the production flow, storage and delivery.

Packaging the profiles and preassembling in factory of the load bearing structural elements.


Building Methods

Lightweight steel structures building methodsBuilding methods used for steel structure houses. Sections of walls, floors and roofs specific to the building area. Solutions for obtaining thermal resistance, sound resistance and fire resistance.

Recommended prefabricated materials for modern building methods.


Smart living

Unic Rotarex® smart livingNowadays everybody wants to live smart. Unic Rotarex® smart living system is a modern system, based on modern materials and technologies which perfectly fit into the smart thinking era.

Heat recovering air conditioning, water filtering and smart home systems.



Unic Rotarex® the lightweight steel structure factory partnerhipsUnic Rotarex® can give you the right to use its know-how trough a certificate, during a specific period of time, in which, in order to extend your right to use, you must fulfill the obligations assumed in the certificate. Read more…