**5. Conclusions**

This study investigated the use of WAAM steel components in construction. The fundamentals of both architectural and structural design were introduced. The experimental investigations made use of steel bars as the geometrically simplest geometry to demonstrate component and material behavior typical for WAAM structures. The WAAM process was linked to the build-up geometry, surface topography, and material properties. The key findings are:


**Author Contributions:** Conceptualization, J.H. and J.U.; methodology, J.H., J.U., and J.M.; investigation, J.M. and M.G.; resources, K.D. and K.T.; writing—original draft preparation, J.M., M.G., and C.M.; writing—review and editing, J.H.; visualization, J.M., M.G., and C.M.; supervision, K.D., K.T., and H.K.; project administration, J.H., K.T., and H.K.

**Funding:** This research received partial funding from Deutsche Forschungsgemeinschaft, Major Research Instrumentation, Optical Strain Measurement System, No. 221277291.

**Acknowledgments:** We acknowledge support by the Open Access Publication Funds of the Technische Universität Braunschweig.

**Conflicts of Interest:** The authors declare no conflict of interest.
