Pir Bavaghar, M., Sobhani, H., Feghhi, J., Darvishsefat, A., Marvi- Mohajer, M. (2007). Investigation on production rate and cost of Timberjack-450C in two skidding direction in combined harvesting system. , 15(4), 385-374.
Mahtab Pir Bavaghar; Hooshang Sobhani; Jahangir Feghhi; Ali Asghar Darvishsefat; Mohammad Reza Marvi- Mohajer. "Investigation on production rate and cost of Timberjack-450C in two skidding direction in combined harvesting system". , 15, 4, 2007, 385-374.
Pir Bavaghar, M., Sobhani, H., Feghhi, J., Darvishsefat, A., Marvi- Mohajer, M. (2007). 'Investigation on production rate and cost of Timberjack-450C in two skidding direction in combined harvesting system', , 15(4), pp. 385-374.
Pir Bavaghar, M., Sobhani, H., Feghhi, J., Darvishsefat, A., Marvi- Mohajer, M. Investigation on production rate and cost of Timberjack-450C in two skidding direction in combined harvesting system. , 2007; 15(4): 385-374.

Investigation on production rate and cost of Timberjack-450C in two skidding direction in combined harvesting system

تحقیقات جنگل و صنوبر ایران
Article 8, Volume 15, Issue 4 - Serial Number 30, January 2008, Pages 385-374    PDF (273.58 K)
Document Type: Research article
Authors
Mahtab Pir Bavaghar* 1; Hooshang Sobhani2; Jahangir Feghhi3; Ali Asghar Darvishsefat2; Mohammad Reza Marvi- Mohajer4
1Ph. D. Student, faculty of Natural Resources, University of Tehran
2Associate Professor, Faculty of Natural Resources, University of Tehran
3Assistant Professor, Faculty of Natural Resources, University of Tehran
4Professor, Faculty of Natural Resources, University of Tehran
Abstract
 Managers of logging operation are faced with profit reduction due to rapid increases in equipment costs, rapid depreciation of equipment and changing logging systems from harvesting the large trees to the smaller ones. The simplest way to confront this problem is improving the efficiency of the logging operation. Using work study methods, the required information for this purpose can be obtained. The aim of this study was to develop skidding time estimation model, skidding unit cost and productivity estimation of Timberjack- 450C skidder in two skidding directions and under combined logging system (tree length, long wood and short wood systems depending on different situations). The results show that skidder productivity rate in uphill skidding is 16.31 m3/hr and greater than its productivity in downhill skidding (12.32 m3/hr). Changing of logging system (using combined system (with 14.31 m3/hr productivity rate) rather than short wood system (8.88 m3/hr) gives rise to the increase of productivity rate. The Timberjack- 450C production cost which was working under contract was 145000 rials/ m3.
 
Keywords
Productivity; Timberjack- 450C; skidding direction; harvesting combined system; time study; Cost
References

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