Tilt-up concrete housing makes more sense today than ever before. Victor Greimann, a tilt-up pioneer from Kettering, Ohio, certainly thinks so. Greimann still remembers his first building endeavor with nostalgia. It was 1946, just after World War II. The homes were relatively small, like many so-called GI homes built in great numbers to ease the post-war shortage. "However, ... the market began to change in the 1950s and 1960s. People were becoming more affluent and desired more upscale homes."