M. Saarilahti 
,
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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