Matti Kärkkäinen 
Havaintoja koivutukkien epäpyöreydestä ja pituusmittaeroista.
Kärkkäinen M. (1980). Havaintoja koivutukkien epäpyöreydestä ja pituusmittaeroista. Silva Fennica vol. 14 no. 3 article id 5083. https://doi.org/10.14214/sf.a15024
English title: Observations on the out-of-roundness and deviations from nominal lengths of birch logsAbstract
A material of 478 birch logs were measured. The horizontal diameter was on average larger than the vertical one, the difference increasing with the increasing diameter. The reason was supposed to be the effect of sweep and out-of-roundness of logs. The difference between the actual and nominal length increased with the increasing lengths, but decreased with increasing diameter.
The PDF includes a summary in English.
Original keywords
puutavaranmittaus;
koivu;
sahaus;
läpimitta;
koivutukki;
epäpyöreys
English keywords
birch;
Betula;
logs;
diameter;
roundness
Published in 1980
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Available at https://doi.org/10.14214/sf.a15024 | Download PDF
