Qatar turns desert sand into the world’s largest 3D printed structure

Qatar has embarked on constructing the world’s largest 3D-printed buildings—two public schools each covering 20,000 square meters—using massive custom-built printers from Denmark’s COBOD. This project, part of a larger plan to build 14 schools totaling 40,000 square meters, represents a 40-fold increase in scale compared to the previous largest 3D-printed structure, a 10,000-square-foot equestrian facility in Florida. The printers, each the size of a Boeing 737 hangar, extrude specialized concrete layer by layer to create walls with flowing, dune-like curves inspired by Qatar’s desert landscape. Over the past eight months, a multidisciplinary team in Doha has conducted more than 100 full-scale test prints, optimizing concrete mixes and printer technology to withstand Qatar’s harsh climate. Printing primarily occurs at night to enhance material performance and reduce environmental impacts such as dust, noise, and energy use. The project not only pushes the boundaries of large-scale additive