Photos: Four robotic arms construct earthquake-resistant building walls in two days

The Itaca project in Northern Italy has successfully demonstrated the use of four synchronized robotic arms to 3D-print earthquake-resistant building walls, completing the structural shell of a self-sufficient farm within just a few days. Utilizing a Crane WASP system arranged on a hexagonal frame, the robotic arms simultaneously printed four separate wall sections, each about 380 cm high and covering a total area of 164.9 m². This innovative approach meets stringent Italian and European seismic safety standards, marking the first certified 3D-printed construction of its kind in a regulated, seismically active region. The walls were constructed using a lime-based mixture instead of traditional concrete to reduce carbon emissions, while also incorporating breathable properties that regulate internal temperatures and prevent mold. Internal cavities within the thick (60-70 cm) walls are filled with rice husks and natural lime powder for insulation, creating a passive energy-efficient structure. Reinforcement columns placed inside these cavities provide the necessary support for earthquake resistance and a green