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Since the health hazard of asbestos fibers has been widely recognized, the number of asbestos abatement projects in schools has increased rapidly. Most of these projects were planned during summer vacation from school. However, in Japan, it is hot and humid in summer. Moreover, the workers have to wear impermeable protective clothing because of the asbestos exposure risk. The purpose of this survey is to study the workload of asbestos abatement work by measuring physiological reactions. Physiological strains of 12 male workers and working conditions during asbestos abatements work in two schools were measured in August in 1988 and in 1989. Body weight loss by the work of all workers was measured, and heart rate, rectal temperature and skin temperatures at five sites of some of them were measured every minute. In both workplaces, the workers wore disposable coveralls with hoods and shoes covers and protective masks. Air temperature in the workplaces was between 24.6 degrees C and 28.8 degrees C, and air humidity was between 85% and 96%. The high humidity was result of covering the floor, ceiling and wall of the workplaces were covered with vinyl seats, and sprinkling the asbestos fibers with water to lower the amount of asbestos in the air. Working hours of asbestos abatement were between 46 minutes and 95 minutes. Sweat rates were between 217 g/h and 605 g/h. These values were greater compared to the estimate values when work was done wearing commonly used light clothing. Heart rates during asbestos abatement work did not exceed 150 beats/min in one school where the temperature was 25 degrees C-27 degrees C.(ABSTRACT TRUNCATED AT 250 WORDS)

A Survey on Physiological Strains of Asbestos Abatement Work Wearing Protective Clothing in Summer.