Erection of the steel structure has started

At the beginning of November, the erection of the steel structure for the new back straight “Am Böllenfalltor”, the venue of the SV Darmstadt 98, has started.

Donges SteelTec manufactures, supplies and assembles the steel roof construction for the new back straight in the Merck Stadium, Darmstadt.

Around 400 tons of steel are required for the construction of the new grandstand roof. The roof structure consists of 40 m long trusses that converge at the tips in a V-shape. The anchoring is carried out per axis via two supports and a tension anchorage, which are optimally designed for the changing stresses generated by the wind load. The main column stands on a solid steel component, which is concreted into the upper sawtooth beam of the grandstand. The scope of services also includes the roof and wall cladding.


Night mission went according to plan

In the night from 09 to 10 November the new railway overpass in Heppenheim (Bergstraße) was successfully lifted in. Completely manufactured and coated each of the components was transported by truck to the construction site where it was assembled in a tandem lift. The transport length was approx. 18.6 m with a unit weight of up to 100 tons.

Donges SteelTec has been contracted with the manufacturing, delivery and assembly of the steel construction for the railway overpass in Heppenheim, Germany. The railway bridge will span the railway line 3601 Frankfurt – Heidelberg via the federal road B 460 “Lorscher Straße”.

The overpass consists of two separate superstructures. Each superstructure is designed as a trough bridge with thick sheet metal. On one side of each of the two superstructures a walkway will be added.The span width of the bridge is approx. 15.40 m, the construction height 0.8 m. This results in a slenderness of L/H = 19.25. Each of the superstructures is 4.70 m wide. The pavements have widths of up to 1.45 m.


The superstructure of the Viaduct Heidingsfeld has reached the other side of the valley

With the sixth and last movement of the 2nd construction phase, the superstructure reached the other side of the valley as planned.

In the coming days preparations will be made for stacking the bridge, which will bring it into its final position. Subsequently, our erectors will carry out the remaining work on the steel structure,

so that by the end of next year the 2nd construction phase will also be completed and opened to traffic.

Search: Trainees. Bid:  Steel-hard arguments.

We build with steel and would like to pass on our passion for this material. As of 01st September 2020, we are looking for apprentices to become Construction Mechanics and technical Systemplanners.

We have been building steel bridges and manufacturing innovative steel structures for over 140 years. Each construction is individual and a small masterpiece. Our trainees can expect a great team that cope with a wide range of tasks. We plan, develop, construct, complete and assemble architecturally demanding steel projects. 

Our junior staff awaits a versatile and high-quality training. We demand and encourage and, of course, offer attractive and fair pay. Company training projects and an extensive training program come on top.

Here you can find more information about our two training paths.


Are you curious? Applications are now welcome!

Application documents are sent – by e-mail or by post – to our personnel department. 

Donges SteelTec GmbH
Mainzer Straße 55
64293 Darmstadt



Our training managers will be happy to provide further information in advance:

Apprenticeship as Construction Mechanic:

Joachim Abt, Phone: 06151/889-346 or

Training as Technical Systemplanner:    

Thomas Kloose, Phone: 06151/889-710 or

Second construction phase of the new bridge over the motorway A1 was successfully completed.

Last September weekend, 10 steel girders of the new bridge over the A1 near Köln-Niehl were assembled in two night operations.

The A1 section was completely closed for the entire weekend.

As in the first construction phase, the components manufactured in our workshop in Darmstadt were transported to the construction site by heavy goods vehicles, lifted by a 500 tons crane and placed on prepared support benches.

Fifth movement took place as planned

See the video for details on the move operation.

BR Media Library Video

Donges SteelTec celebrated a special summer party in the company’s history on August 30th in glorious sunshine.

The members of the works council had invited all employees and their families as well as retired former colleagues to a summer party in the company courtyard. With suckling pig, Argentinian steaks and cool drinks, all guests had ample opportunity to exchange memories of joint projects and to inform themselves about current production orders during a workshop tour. For the children, a large bouncy castle and a painting table were specially organised as a pastime.

The two managing directors, Johannes Laumann and Peter Brechtelsbauer, together with the chairman of the works council, Ercan Kaya, welcomed the two guests of honour: the former owner of the company, Rainer Müller-Donges, and the long-standing managing director, Dr. Volker Adam. They also took the opportunity to present the newly formed Donges Group. Representatives of the partner companies Kalzip and FDT had travelled from Koblenz and Mannheim to the celebration and could inform themselves locally about the new parent company.

It was a carefree and very talk intensive afternoon. And certainly, the family celebration also brought the Donges company family a little closer together.

A45 – New bridges of the B54 arrived at their location

Darmstadt/Haiger, 22.07.2019.
3000 tons of steel construction roll on 384 wheels on the motorway A45 near Haiger.

The two new truss bridges of the B54 near Haiger, each weighing around 3000 tonnes, were successfully driven over the existing A45 motorway during a 50-hour closure on the weekend of Friday, 19 July to Sunday, 21 July and lowered in their final position.

The 96 m and 120 m long steel structures with a weight of 800 tons and 1200 tons, which were manufactured as large components at the Donges SteelTec GmbH plant in Darmstadt, were completely pre-assembled next to the motorway for months, welded and subsequently fitted with a concrete roadway slab.

The superstructures were then stacked up to 9.00 meters and brought to their respective end positions by self-propelled platform module transporters (SPMT).

The manufacturing process and the running-in process are regarded as a unique project in Germany, especially due to the almost complete completion in lateral position.


Donges SteelTec is investing in two new gantry cranes at its Darmstadt site.

Dr. Peter Schäfer, Production Manager of Donges SteelTec GmbH, calls the acquisition of the two new double-girder gantry cranes, which were commissioned on schedule on June 26, “An important investment in the future of our bridge and building construction production”.

The lifting capacity in the former lightweight hall will be increased by the two cranes from 2 * 10 to 4 x 20 tons, so that components with unit weights of up to 80 tons can be produced. The company thus has expanded production capacities for heavy bridge and steel building constructions at its disposal.

The cranes have already successfully passed the first test in the production of the “Stokkumer Straße Emmerich” bridge. The next application will be for the components for the bridge structure “A1 left bank of the Rhine”.


The first bridge section was achieved

Darmstadt/Linz 24.06.2019.
On Friday, 21.06.2019 the middle section of the bypass bridges in Linz was successfully erected. The 950 t heavy and over 90 m long bridge section was moved into position by ship and pulled into end position by steel cables. Thus, the first bridge section of approx. 3500 t across the Danube was achieved. Next week a further bridge section will be erected in Urfahr in the bank area and the preparatory work for the second bypass bridge has also begun with the first deliveries to the pre-assembly site.