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Tuesday, 29 November 2016

Modelling and comparing timber winching performance in windthrow and uniform selective cuttings for two Romanian skidders

Published Date
Volume 19, Issue 6pp 473–482

Original Article
DOI: 10.1007/s10310-014-0439-0

Cite this article as: 
Borz, S.A., Ignea, G. & Popa, B. J For Res (2014) 19: 473. doi:10.1007/s10310-014-0439-0

  • Stelian Alexandru Borz
  • Gheorghe Ignea
  • Bogdan Popa

Cable skidders are one of the most used means for logging. In overall skidding operations, winching operations mark themselves out by consuming an important amount of time, which, depending on the work conditions can reach up to 43 % of the total skidding time. A better understanding of those conditions that may act as significant influence factors when estimating time consumption is needed as a prerequisite for better work organization. Based on an extensive time study, this paper demonstrates that along with influence factors that were already identified as being significant (especially winching distance), other influence factors, such as log volume, work pattern, felling area conditions and intervention type, slope, and winching direction, may prove significant in predicting time consumption for the main work elements of winching operations, as well as for a winching cycle. All the variables mentioned presented a great significance (p < 0.05) for a winching replication, and taken apart, they presented great significances for certain work elements. Distance was the most significant independent variable for all the realized time prediction models, slope and winching direction became relevant especially in the case of manual pulling of the cable, whereas intervention type and work patterns made the difference when performances were evaluated. The amount of data within data pools may have a great importance when trying to emphasize the relevance of different variables, as demonstrated by this paper.


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