A dramatic change in the construction of new apartment housing for low and medium income families may well result from bringing the technology of the factory assembly line to the construction field. A six-story, 24 unit apartment building constructed in Richmond, California, is one of the first structures to employ this concept. The key to this new technology is a chemically prestressed concrete which permits three dimensional casting of exterior and interior walls, and ceiling planes, in a single monolithic unit. There are no joints between walls and ceiling and the technology allows at least a 50 percent weight reduction from conventional techniques. The new technique creates greater than conventional strength and allows bearing walls of only 2 inch thickness in a six story structure. Each apartment is a three bedroom unit, carpeted, and heated by radiant ceiling mounted panels. The building was financed through an FHA mortgage, and constructed under FHA's experimental housing program.