WIEHAG GmbH is an Austrian timber construction company based in Altheim, Upper Austria, not in Frankfurt am Main, though it delivers projects internationally, including significant works in Germany. Founded in 1849 by master carpenter Josef Wiesner, WIEHAG has remained a family-run business for five generations. As of 2024, it employs over 380 people across its headquarters in Altheim and offices in Eningen, Bilbao, London, and Melbourne.
WIEHAG specializes in engineered timber structures for large-scale architectural and infrastructure projects. The company’s expertise spans engineering, design, advanced manufacturing, and the logistical coordination of complex timber buildings. In recent decades, WIEHAG has built a reputation for pushing technical boundaries, developing prefabrication methods, and delivering high-performance glued laminated timber components up to 50 meters in length. Its factory integrates cutting-edge CNC technology for both production efficiency and precision.
Recent reference projects include the Timber Pioneer office building in Frankfurt, which is among Germany’s first timber-hybrid office structures. Other high-profile projects are the World of Volvo exhibition building and the forthcoming Atlassian Tower in Sydney, set to be the world’s tallest timber-hybrid skyscraper. WIEHAG was also responsible for the long-span timber roof at Messe Frankfurt Hall 11.
WIEHAG positions itself as both a technology leader and an advocate of sustainable construction, investing in renewable energy for its operations and emphasizing timber’s climate benefits. Its current focus includes large public and commercial buildings as well as custom architectural solutions for environmentally ambitious clients.