Mäntytukkien sahauksen järeyden mukainen taloudellinen tulos ja siihen vaikuttavia tekijöitä. | Financial result of sawing pine logs as influenced by top diameter and other associated factors.
1992
Hakala, Herman | The Finnish Society of Forest Science | Suomen metsätieteellinen seura | Finlands Forstvetenskapliga Samfund
The influence was examined of log characteristics (diameter, length, taper, volume, density and quality), sawing pattern, yield, sawing efficacy, stoppages and consumption of electricity on the profitability of sawing pine [Pinus sylvestris] logs. The costs (raw material, capital, labour, energy and other) and revenues (sawn timber, chips, sawdust and bark) were also studied. The study was based on tests using conventional sawing patterns of 1606 logs at the Teuva sawmill (owned by Botnia Wood Oy), Finland, in 1985. A sawing simulator was used to (i) calculate the yield of by-products and (ii) examine the influence of other sawing patterns on yield and sawing result. Profitability increased as log diameter increased. The absolute price difference between the smallest diameter class (133-152 mm) and the largest diameter class was M 99.1/msuperscript 3 over bark. Revenue (mainly from sawn timber) accounted for M 66/msuperscript 3 and costs (mainly of raw materials) for M 33.1 msuperscript 3 of this difference. Diameter, yield and sawing efficacy had a greater influence on costs and revenues than did stoppages.
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