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M. Saarilahti (email), E. Bakena, G. Mboya, T. Minja, T. Ngerageze, J. Ntahompagaze

Studies on Tanzanian forest work.

Saarilahti M., Bakena E., Mboya G., Minja T., Ngerageze T., Ntahompagaze J. (1987). Studies on Tanzanian forest work. Silva Fennica vol. 21 no. 2 article id 5314. https://doi.org/10.14214/sf.a15471

Abstract

Four teams of two workers were time-studied in clearcutting of a cypress plantation and three teams in sulky skidding. The heart rate was recorded every 30 s. The average heartrate in timber cutting was 117.5 ± 13.4 P/min, and it was mainly dependent on worker’s working capacity. Average work load index was 41 ± 3% when working at 97% performance. The production rate was then 2.5 m3/h (crew). In sulky skidding the heart rate was lower, 106 ± 1.1 P/min, as well as the work load (WLI 30 ± 1%) and performance rating (87%). The low production rate (1.1 m3/h) (crew)) over 45 m distance is mainly due to under-dimensioned load size. The energy expenditure in timber cutting was 21.4 kJ/min and in sulky skidding 16.3 kJ/min. Daily energy expenditure was 15.0 MJ/d, and most of the timber cutters belonged to the class ”exceptionally active”.

The PDF includes an abstract in Finnish.

Keywords
logging; time study; heart rate; work load; forest work; production rate; Africa; performance rating; manual timber cutting; sulky skidding; energy expenditure

Published in 1987

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Available at https://doi.org/10.14214/sf.a15471 | Download PDF

Creative Commons License CC BY-SA 4.0

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Saarilahti M., Bakena E. et al. (1987) Studies on Tanzanian forest work. Silva Fennica vol. 21 no. 2 article id 5314