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Skyline tension and dynamic loading for cable yarding comparing conventional single-hitch versus horizontal double-hitch suspension carriages5.79 MB
Published VersionCC BY-NC-ND V4.0, Open Access
Journal article
Skyline tension and dynamic loading for cable yarding comparing conventional single-hitch versus horizontal double-hitch suspension carriages
International journal of forest engineering, Vol.32(Supplement 1), pp.31-41
2021
Abstract
Wire rope used in cable logging, where a series of cables facilitate the extraction of timber on steep terrain, experiences high tensions that must be managed to ensure safety. Innovations change practices over time and double-hitch carriages, which allow trees to be extracted horizontally, are a recent example. This makes it feasible to harvest across terrain with limited deflection, increases the recovery of biomass, and potentially reduces high-dynamic load events associated with ground contact. In this study, a standard single-hitch carriage was compared against a new double-hitch carriage under controlled conditions. Tension was measured continuously and specific elements, such as tension when the carriage was at midspan, maximum tension at breakout and inhaul, and magnitude of cyclic tension during inhaul were identified, measured and compared against payload. While payload was similar in the treatments, the additional weight of the double-hitch carriage resulted in higher skyline tensions. In both treatments, payload and skyline tension when the carriage was at midspan were strongly correlated. Cyclic tension was reduced by the double-hitch carriage system. While a number of unique high-dynamic loads were identified that were not part of the normal extraction, they represented only 6% of the cycles and the maximum tension was similar to that experienced during break-out and inhaul. This study increased the understanding of skyline tension during logging operations and the effect of carriage type. It showed that, though tension often exceeds the safe working load of the cable, it does not exceed the endurance limit for a well-designed and operated system.
Details
- Title
- Skyline tension and dynamic loading for cable yarding comparing conventional single-hitch versus horizontal double-hitch suspension carriages
- Authors
- Raffaele Spinelli (Author) - University of the Sunshine Coast, Queensland, Forest Industries Research CentreNatascia Magagnotti (Author) - University of the Sunshine Coast, Queensland, Forest Industries Research CentreGiulio Cosola (Author) - CoNAIBo - Coordinamento Nazionale Delle Imprese BoschiveStefano Grigolato (Author) - Università Degli Studi di PadovaLuca Marchi (Author) - Università Degli Studi di PadovaAndrea Rosario Proto (Author) - Università Mediterranea di Reggio CalabriaEric R Labelle (Author) - Technical University of MunichRien Visser (Author) - University of CanterburyGernot Erber (Author) - University of Natural Resources and Life Sciences
- Publication details
- International journal of forest engineering, Vol.32(Supplement 1), pp.31-41
- Publisher
- Taylor & Francis Inc.
- Date published
- 2021
- DOI
- 10.1080/14942119.2021.1909322
- ISSN
- 1913-2220; 1494-2119
- Copyright note
- © 2021 The Author(s). Published with license by Taylor & Francis Group, LLC. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
- Organisation Unit
- University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
- Language
- English
- Record Identifier
- 99532508902621
- Output Type
- Journal article
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