In 1939, William E. Urschel was already experimenting with automated construction behind a small warehouse in Valparaiso, Indiana. His invention, known as the

In 1939, William E. Urschel was already experimenting with automated construction behind a small warehouse in Valparaiso, Indiana. His invention, known as the “Wall Building” machine, used an approach that bears a striking resemblance to the principles behind today’s 3D-printed construction. [▻](h…