%0 Article
%T Studies on Tanzanian forest work.
%A Saarilahti, M.
%A Bakena, E.
%A Mboya, G.
%A Minja, T.
%A Ngerageze, T.
%A Ntahompagaze, J.
%D 1987
%J Silva Fennica
%V 21
%N 2
%R doi:10.14214/sf.a15471
%U https://silvafennica.fi/article/5314
%X <p>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 m<sup>3</sup>/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 m<sup>3</sup>/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”.</p>
<p>The PDF includes an abstract in Finnish.</p>