ASSESSMENT OF HEAT STRESS AMONG FOUNDRY WORKERS AND JUSTIFICATION OF WORK–REST REGIMENS
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This study aims to link heat stress assessment in foundry production to the operations performed and conditions in rest areas, and to establish a quantitative basis for selecting work–rest regimens. The methods included a targeted literature review, comparison of published aggregate data, and deterministic scenario calculations for 36 combinations. Published mean wet-bulb globe temperature (WBGT) values were plotted with their standard deviations, while the outcomes of measures to reduce heat exposure were compared separately. The calculations assumed work-area WBGT values of 32, 34, and 36 °C, rest-area values of 24, 27, and 29 °C, and rest periods of 10, 20, 30, and 40 minutes per hour. The calculated mean WBGT values ranged from 26.67 to 34.83 °C. With 30 minutes per hour allocated to rest, reducing rest-area WBGT from 29 to 24 °C lowered the mean index by 2.50 °C. The results demonstrate the need to consider both the duration and conditions of rest. The article is based on secondary analysis of published data and scenario calculations; no new workplace measurement results are presented.
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