On the morning of November 12, 1992, an accidental fire destroyed most of the Dole Fresh Vegetables plant in Yuma, Arizona, and resulted in a loss estimated at $16 million. The building was a noncombustible structure with light-gauge metal exterior walls and roof components. Polyurethane foam insulation was sprayed over the interior surfaces of the exterior walls and roof. In addition, wood-frame walls were constructed throughout the building in front of the foam insulation to permit washing of interior surfaces. Automatic sprinklers were installed and provided protection in the occupiable spaces throughout the facility. On the day of the fire,...