PENILAIAN BEBAN KERJA FISIK DAN WAKTU ISTIRAHAT PEKERJA TUNGKU KAYU INDUSTRI DOLOMIT DENGAN METODE CVL DAN KONSUMSI ENERGI
DOI:
https://doi.org/10.61105/jieti.v4i2.611Keywords:
beban kerja fisik, beban kardiovaskular, konsumsi energi, waktu istirahatAbstract
Manual handling in the dolomite processing industry can impose physical workload and fatigue, particularly in hot working environments. This study aimed to measure the physical workload of wood-fuel furnace workers at PT Magnesium Gosari Internasional, determine their rest time requirements, and propose work system improvements. This quantitative descriptive study screened 36 furnace and bagging workers with the Industrial Fatigue Research Committee (IFRC) questionnaire; six furnace workers were purposively selected. Physical workload was assessed using Cardiovascular Load (%CVL) based on heart rate recorded with a smartwatch, while rest time requirements were calculated from energy consumption. %CVL values ranged from 34.2% to 64.9%: four workers were in the improvement required category and two in the allowed to work for a short time category. Mean energy consumption was 7.9 kcal/min, requiring about 129 minutes of rest per shift, versus an actual full rest of about 60 minutes. All measured workers had moderate IFRC fatigue, yet two exceeded 60% CVL, so subjective and physiological assessments should be combined. Proposed improvements include using production waiting time for breaks with light physical demands, plus hierarchy of control measures: cutting wood into smaller pieces, material-handling aids, a recovery area with drinking water, job rotation, manual handling training, and personal protective equipment.
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