Productivity of timber extraction by Urus MIII cable crane from selective spruce forests

Abstract

The purpose of this study is to investigate the productivity of the Urus Mill cable crane during yarding of spruce timber from spruce stands in North Eastern Turkey. Cable crane productivity is determined by using the methods of work and time study. The research concludes that some working characteristics of the Urus Mill cable crane such as transportation speed of the carriage (loaded and unloaded), load volume, time consumptions of felling area, fuel consumptions, productivity of the cable crane and transport distance have an absolute impact on the productivity of the cable crane. In this study, for average 210 meters transporting distance, productivity of Urus Mill cable crane was found 10.08 m(3)/hr on two different corridors. The average fuel consumption was 3.5 - 4.0 liters per operating hour of the Urus Mill cable crane. Costs of Urus Mill cable crane are calculated to 4.6 $/m(3).