Timber structures and buildings made from sustainable forestry might be the solution to today’s ecological challenges when their renewable materials are locally processed with low energy consumption in production. The current market shows a dominance of rectangular cross-sections in engineered timber solutions. Roundwood, a traditional material in the past, is no longer common due to a lack of applications in modern structures, lost knowledge in handcraft skills and the high costs of digital manufacturing. To overcome restrictions in joint technologies and to increase the usability of roundwood in modern constructions, a new joining technology for modular trusses has been developed and adapted to the preferences of structural roundwood.