We offer


From 24 tons around the world

A perfect fit in every dimension Individual solutions with digitisation

The Unger Steel Group offers bespoke solutions for your construction project. We handle a wide range of projects in structural and architectural steel construction, from a single lorry load of steel (24 tons) to major projects with high order volumes. Our high degree of digitisation lays the path for technical masterpieces worldwide. In addition, the company offers extensive expertise in upstream and downstream processes.

  • Consultancy for building owners, architects and tenderers
  • Submission planning
  • Structural and cost optimisation
  • Static calculation of supporting structure and shell
  • Digital planning process via BIM
  • Semi-automated production
  • Assembly execution based on simulations and safety concepts

Facts & Figures

Precision, speed, performance!

Parametrised planning, semi-automated execution and assembly of steel structures

Unger Steel completes around 100 steel construction projects every year at more than 50 locations worldwide.

Unger Steel Construction has state-of-the-art, digitally controlled machinery, operated by highly qualified employees. This enables maximum throughput volumes of 90,000 tons of steel every year, in as short a time as possible.

All of Unger’s processes are digitally supported throughout. This means that all processes, from coordination with customers to raw materials orders and assembly of finished components, are digitally modelled and reproduced.

This process, the lifeline of steel, can be roughly represented in three sections.

BIM Planning

– From the information to the material


– Semi-automation and manufacture


– Form perfection



Our references

Consistently high performance

Discover a selection of successfully completed projects from the last decade here. You can find a comprehensive overview of our projects using the link to the reference book. The diverse range of projects encompasses architectural steel construction, trade fair and events buildings, sports, leisure and multi-purpose buildings, car dealerships, plant construction, car parks, production halls and industrial buildings. With our understanding of quality and a willingness to achieve the ideal result for our customers, we have been able to work at both national and international level. Highly motivated employees, a well-coordinated team and digitally supported, semi-automated production processes at Unger Steel make this possible.

Steel construction webcams
We build

Our webcams give you a peak into our projects.


Check out the following selection of webcams:


movable Stadium Pool (Stadionbad), Vienna
Austrian Steel Design Award 2023
Category: Sustainability
Österreichischer Stahlbaupreis 2023, Kategorie: Nachhaltigkeit
KTM Motohall, Mattighofen
European Steel Design Award 2021
Europäischer Stahlbaupreis KTM Motohall Mattighofen
European Steel Design Award 2019
Austrian Steel Design Award 2017
Solid BautechPreis 2017
Stahlbaupreis für ÖAMTC Zentrale Wien
Vienna city port, Vienna
Austrian Steel Design Award 2011
Solid BautechPreis 2010
Stahlbaupreis für Schiffsstation Wien City
WU Wien
Solid BautechPreis 2015
Solid BautechPreis 2015 für WU Wien
Central Railway Station, Vienna
European Steel Design Award 2015
Global Galvanizing Award 2015
Austrian Steel Design Award 2013
Europäischer Stahlbaupreis Hauptbahnhof Wien
Neue Mitte Lehen, Salzburg
European Steel Design Award 2009
Europäischer Stahlbaupreis Neue Mitte Lehen Salzburg
Galzigbahn, St. Anton
Austrian Steel Design Award 2007
Österreichischer Stahlbaupreis Galzigbahn St Anton
Bucharest Tower Center, Bucharest
European Steel Design Award 2007
Europäischer Stahlbaupreis Bukarest Tower City

In detail

Every building starts with a shared vision

Integrated realisation at Unger

At Unger Steel, interaction with our customers helps to create a building from geometric fundamentals. The first step is to establish the unknown parameters. Once the information is agreed, it provides the basis for integrated realisation (digitally controlled processes from raw material through to assembly) at Unger Steel Construction. Integrated realisation means a multi-layered feedback process between the architectural model and construction model, between digital modelling and physical conditions on site. Central tools to support this are Building Information Modelling (BIM) and, closely connected, semi-automated production, manifests and assembly concepts from Unger Steel Construction.


The digital twin – the DNA of your building

At Unger Steel Construction, your building is created as a 3D model containing all production-relevant data. It’s what we call a ‘digital twin’, which not only helps to visualise the building, but also serves as a reference for feedback processes and measurements.

This BIM model supports the entire construction process – from ordering of raw materials to production and fitting of the very last screw.


Three decades of experience in BIM planning

Unger Steel has been using BIM since 1989, although back then, its functionality was fairly limited. Since then, around 50 design engineers, 20 project managers, 5 structural engineers and 20 assembly foremen as well as the entire production management team have started to use Building Information Modelling.


Parametric modelling to scale the order volume

Unger Steel Construction uses parametrised geometry, or macros (templates), in the planning phase. These are used to automatically generate individual components and their node connections within a wider context This way, larger order volumes can be realised efficiently and within short planning periods.


Integrated realisation

Planning (statics)

The execution and adjustment of building geometry, the final design, takes place in close coordination with our customers using digital 3D models.

Production – semi-automation and manufacture

This model serves as the basis for the production, or the steel making, of your project. From digital information to the building part!


Digital assembly concepts created in advance enable generation of chronological manifests using BIM-supported component selection.


Our methods for monitoring deadlines

All internal processes are digitally recorded and controlled in our own ERP system.

The requisite databases are controlled via BIM based on cumulative construction schedules of all simultaneous projects.

  • Purchasing list for raw materials procurement
  • Construction work list (CAD)
  • Production work list
  • Shipping manifests

An overview of costs

Unger Steel’s comprehensive project controlling offers the perfect overview of the costs of your project. Extrapolated costs can already be viewed when the BIM model (5D) is created.


Clarity with process modelling

Unger Steel’s clear process modelling ensures stability in your project execution.


Optimal knowledge management at Unger Steel

The Unger Identification Code (UIC) allows you to identify every element created at Unger, and therefore trace it back to the raw materials producer.

A web-based, internal wiki (digital encyclopedia) enables access to the knowledge available at Unger at any time, from factory standards to performance declarations.


Scroll Image

Circular Economy

Sustainability with Unger: Let´s start with us!

1 PV system (1.450 kWp)

2 Emission-reduced fleet

3 LED lightning (office and production)

4 Thermal insulation

5 Delivery by rail (600 to/a CO2 Reduction)

6 Roof greening

7 EPD – Environmental Product Declaration

8 Car charging station (38 pcs.)

9 Green break spaces and facade

10 Waste heat recovery

11 CO2 reduced materials (rolled profiles and heavy plates)

12 100 % green electricity at the location

EPDs for Unger steel constructions


Why EPD´s?

If you want to be a pioneer in terms of sustainability, you must also focus on complete transparency – throughout the entire product life cycle. We lead the way and use EPDs verified by the relevant testing bodies to ensure a good data basis for the ecological assessment of steel as a material.

4R - circular economy - The path to sustainability

What is the cycle of steel?

  • Steel is infinitely and completely recyclable, in most cases without any loss of quality.
  • 85-95 % of old steel at the end of its service life is currently recycled into new steel products and accounts for over 20 % of today’s steel production.
  • However, end-of-life steel is just the beginning of green steel – recycled and renewably produced from up to 100 % scrap steel.
Comparison of building materials in the life cycle assessment

In the context of the circular economy, the end-of-life balance of building products is important because although buildings are generally long-lasting products, they consume significant material resources and if we do not keep these resources in use through reuse or genuine recycling, the circular economy is lost.

Building materials differ considerably in their service life balance; this depends on both the material properties and the resulting designs.

RE-DUCE: CO2 reduction in raw materials and construction

Value Engineering

Value engineering makes it possible to reduce steel masses through higher steel grades.


CO2-reduced steel

At Unger, we offer the processing of CO2-reduced steel. This makes it possible to reduce the CO2 footprint by up to approx. 70 % using only the raw material.

Rolled profiles

conventional steel: – reduced steel:

SALCOS© – Annex Download


XCarb© Download


XCarb© Download



Heavy plates

conventional heavy plates: – reduced heavy plates:




CO2 reduced trapezoidal sheet and sandwich panel

CO2 reduced coating and hot-dip galvanizing

  • Water-soluble paints reduce CO2 emissions due to a lower VOC content
  • Application specifically for DGNB/ÖGNI-certified construction sites
  • With Green-Zinc: 75 % less CO2 emissions
  • CO2 footprint of less than 1 kg CO2 per kilogram of zinc
  • In comparison, conventionally produced zinc produces around 4 kg CO2 per kilogram of zinc. (Source: Deutsches Umweltbundesamt)


Comparison of building materials

A lot of mass („weight“) causes a lot of CO2



Unger Steel Construction is your partner for small and large projects, whether on home turf or in the Fiji Islands. When it comes to accomplishing projects, no mountain is too high, no region too remote.

Our three plants in Oberwart, Austria, Sharjah, United Arab Emirates and Brehna, Germany, serve as hubs for the global realisation of our projects.

In addition to these three plants, you can also find us at the following branches:


Steinamangererstraße 163
7400 Oberwart | Austria


Tel.: +43 335233524-0
Fax: +43 335233524-15
E-Mail: sales.at@ungersteel.com


Bernd Mühl
Tel.: +43 6644333152
E-Mail: bernd.muehl@ungersteel.com



Münchener Straße 16
06796 Brehna | Germany


Tel.: +49 34954522-0
E-Mail: info@ungerstahlbaubrehna.eu


Sebastian Groh
Tel.: +49 1726385598
E-Mail: sebastian.groh@ungerstahlbaubrehna.eu



P.O.Box 50011
Hamriyah Free Zone – Sharjah | UAE


Tel.: +971 65132-555
Fax: +971 65132-570

E-Mail: sales.uae@ungersteel.com


Valiergasse 62, Top 3-01
6020 Innsbruck | Austria


Tel.: +43 512397958-0
Fax: +43 512397958-20
E-Mail: sales.inn@ungersteel.com


Werner Strele
Tel.: +43 6644242133
E-Mail: werner.strele@ungersteel.com


Roßstraße 96
40476 Düsseldorf | Germany


Tel.: +49 2112297346-0
Fax: +49 2112297346-99
E-Mail: sales.dus@ungersteel.com


Rainer Janßen
Tel.: +49 1791128858
E-Mail: rainer.janssen@ungersteel.com


4201 Main Street Suite 200-107
Houston, Texas | United States of America


Tel.: +1 7134256317


Beim Alten Gaswerk 5
22761 Hamburg | Deutschland


Tel.: +49 4085403886
E-Mail: sales.ham@ungersteel.com


Kay Butzkies-Schiemann
Tel.: +49 1724159593
E-Mail: kay.butzkies@ungersteel.com