The free-standing unit was the first where complex, high-technology installations of security, sprinkler, and electronic systems were factory-installed and shipped complete to the construction site. Although AIDS patients were initially treated in the existing infirmary, the New York City Department of Corrections approved the modular construction in order to separate the patients from the rest of the prison population. A totally noncombustible building with an all-steel frame and concrete subflooring was used that is equipped with two independent electrical distribution systems, special security measures, a complete nurse call system, and a medication and nutrition center. A medium security modular facility is scheduled for occupancy in Hudson County, New Jersey, in 1990; it will be the first two-story, totally noncombustible facility where cells, concrete floors, and the security and operating systems will be installed at the factory.