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The Quantitative Description of Cable Yarder Settings--Parameters for the Triangular Setting with Apical Landing

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The design and operation of an economically efficient timber harvesting system requires the effective characterization of the individual setting. Two contributions are made toward this objective. First, closed-form solutions for several well-established parameters of turn location, including average yarding distance and average yarding slope, are derived for triangular settings on uniform slope with an apical landing. These derivations are greatly facilitated by a new expected value formulation. Second, the new concept of an effective external boundary is presented with one possible definition of its measure for any setting. Closed-form solutions are then obtained for the effective external boundary and the average external yarding distance on any triangular setting with an apical landing. For. Sci. 33(3):603-616.

Keywords: Logging; forest engineering; production analysis; timber harvesting

Document Type: Journal Article

Affiliations: Associate Professor, Logging Engineering, Department of Forest Products and Engineering, AR-10, University of Washington, Seattle, WA 98195

Publication date: September 1, 1987

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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