Time studies on making of saw logs

Seppänen, Vilho

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Vilho Seppänen

Sahatukkien teosta aikatutkimuksen valossa

Seppänen V. (1942). Sahatukkien teosta aikatutkimuksen valossa. Acta Forestalia Fennica vol. 50 no. 19 article id 7372. https://doi.org/10.14214/aff.7372

English title: Time studies on making of saw logs

Abstract

A time study was conducted in saw log harvesting site in state forests of Evo in Southern Finland in 1934. Felling was performed in teams of two loggers. Two teams were observed. The work was divided into several stages of work: felling, branching, cross-cutting, barking and making of top log. On the site grew Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.).

The daily working hours not including breaks was in average 5 hours and 33 minutes. The most time-consuming stage of the work was barking of the stem (55% of working time for Scots pine and 47% for Norway spruce), followed by felling (22.5% for pine and 19.4% for spruce), branching (11.7% and 21.6%) and cross-cutting (11.3% and 11.8%). Temperature affects barking strongly. Scots pine is slower to bark than Norway spruce. Similarly, butt and middle logs are slower to bark than top logs. It took in average 79.02 min to process one solid m³ of timber with bark and 91.45 min without bark.

The PDF includes a summary in German.

Original keywords
aikatutkimus; karsinta; kaato; hakkuutyö; kuoriminen; pölkytys; katkonta

English keywords
saw logs; time study; felling; branching; felling work; barking; cross-cutting

Published in 1942

Available at https://doi.org/10.14214/aff.7372 | Download PDF

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