The KOOP+ Award is presented to the best collaborative and sustainably delivered public construction projects. The jury of the Austrian Society for Construction Technology (ÖBV) selected DC Tower 2 as the most collaborative project of 2025–2026. The 175-metre office tower, built by PORR on behalf of S+B, was recognised at the Construction Congress in Vienna.

PORR CEO Karl-Heinz Strauss welcomed the news: “Collaboration is a fundamental principle at PORR. Time and again, it becomes clear that effective cooperation within the team, with our partner companies and, of course, with our clients, leads to shorter construction times, innovative solutions and outstanding results overall. We are delighted to receive the KOOP+ Award and this recognition”.

Reacting swiftly to the unexpected

The ÖBV jury singled out the exceptional flexibility with which the entire team responded quickly to unforeseen delays and deviations. “The timely decisions, made together, resulted in no disadvantages with regard to the agreed completion date. On the contrary, a significant acceleration in the completion of the structural works was achieved. Overall, the contribution to the project framework conditions was of a very high standard”.

In this way, PORR developed an alternative design for the base slab using a sandwich construction method, which allowed greater control over the maximum component temperature. The loading and unloading of the mobile transport platform was also adjusted. Instead of using a mobile jib crane – which would have been of limited use and, due to the open transport platform, would not have sufficiently ensured occupational safety – a high-capacity construction hoist with a closed cabin was deployed. This can be used safely up to the top floor of the building and even during the finishing phase.

Pilot project for vibration monitoring

One particularly innovative element was a pilot project for vibration monitoring, in which the oscillation behaviour of the office tower was predicted using 3D real-time monitoring and a digital twin model. This made it possible to determine that the building does not require a tuned mass damper. The research findings generated are also significant for future high-rise projects of a similar type and are therefore relevant for the industry as a whole. “In terms of sustainability, solutions not originally planned were developed during the construction process. On the one hand this improved occupational safety and on the other, it contributed to resource savings”, said the jury.

The KOOP+ Award is presented to the best collaborative and sustainably delivered public construction projects in the categories “Infrastructure” and “Building Construction”. The contract volume here needs to exceed EUR 5 million, and the project had to be at least 90% complete by September 2025. Submissions are based on best-practice examples in the areas of collaborative project delivery and sustainability.