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Effect of labour organisation on the level of energy expenditure and static loads of a worker in intermediate cutting

100%

Stempski W.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

2009

tom 08

nr 2

The aim of the performed experiments was to assess energy expenditure and static loads of the operator of a chain sawing machine harvesting timber in a pine stand intermediate cutting. The investigations included two technological variants. In variant I, all technological operations were carried out by one worker – operator of the chain saw, while in treatment II the operations were carried out by a team of three persons – two operators of chain sawing machines and a helper. The energy expenditure was determined on the basis of measurements of the ventilation of lungs, whereas the static load – using the OWAS method. The determined net unit energy expenditures of the chain saw operators in the experimental variants exceeded 20 kJ•min-1 and differed statistically significantly between one another. With regard to static loads, a greater proportion of positions negatively affecting the muscle-skeletal system of the operator were found in variant II.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

1 Stempski W.

1 2009

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Effect of labour organisation on the level of energy expenditure and static loads of a worker in intermediate cutting