The Japanese principle of origami- paper-folding- is the basis of a new concrete construction process that offers economy, freedom of design, and flexibility. The building process is called "Foldcrete" by its originators. It is being applied for the first time in the construction of an 11 floor apartment complex that will become the Printing Specialties Union Retirement Center in Oakland, California. The Foldcrete process permits on-site precasting of entire building units that are lifted by crane and placed, in building block manner, to a height of 16 floors. The patented process was developed by Delp W. Johnson of the San Francisco architectural firm of Johnson, Poole and Storm, in collaboration with William C. Harr. Briefly, here is how the process works: reinforced precasting forms for wall, floor and ceiling components are laid out flat at the construction site in the design pattern specified by the architect. Concrete is placed in the forms and allowed to harden. The units are cast with hinged elements between the components. When lifted by the crane, the force of gravity pulls the units into shape as a closed, or completed, structure. Because all of the precasting is done in a flat position, various kinds of tile and aggregate finishes can be cast right into the facades. The process eliminates the costs involved in shoring and forming, and it also offers the cost advantages or prefabrication without the additional expense of transporting precast units from the factory to the jobsite.