The operating hourly cost of the machine is a suitable factor to analyze the cost fluctuation certain machinery in a changing environment and to find of economically feasible work concepts for the studied machine system. This paper, which is based on studies carried out in northern forests of IR-Iran, analyzed and compared costs of four skidding and excavation machines used in timber harvesting...

Nacrtak This paper deals with accidents in the period 1998 – 2008 reported during harvesting operations in ÖBf AG, Austria’s largest forest enterprise, with a focus on cable yarding. In total 1888 accidents were recorded with 8.7% of these associated with cable yarding activities. The overall accident rate amounted to 36 incidents per million cubic meter extracted by cable yarder. There was a c...

ABSTRACT Pope & Talbot Ltd., Arrow Lakes Timber Division, Nakusp, B.C. having no alternative options constructed a forest road with adverse haul grades up to 16%, to access a harvesting area. The company did not know the exact limitations of the adverse haul grade, but it did plan to use highway sized loads on this off-highway haul, thus sacrificing some productivity. When the road was complete...

The optimum road spacing has been studied by many researches. It is an important step of forest road network planning. The goals of this study are determining the optimum road spacing in Kheiroudkenar forest of Nowshahr in Northern Iran and study of effect of kind of skidder on skidding cost and road spacing. Continues time study method was used to determine the production rate of TAF and Timbe...

information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of caspian forests. skidding and road construction costs are expensive forest operations. determining the optimum forest road network density is one of the most important factors in sustainable forest management. logging me...

This study represents the first attempt of integration, within a Forest Management Plan (FMP), Geographic Information System (GIS) and an Analytic Hierarchy Process (AHP) approach for selection most suitable logging method. It is important to underline that developed methodology applicable worldwide in each environmental context which there need planning intervention selecting from among severa...