Study of Cost Production of Felling using Chainsaw in

Manual felling by chainsaw is one of the logging components which is directly related to human labor performance. It is important because it has to be carried out only in winter. To evaluate the current felling system in Asalem forest and possibility of finding better techniques and cutting team organization. To carry out the study, parcels 318, 319, 321, 322, 365 and 367 of Naav watershed were selected in order to collect the necessary information. The elemental factors of the cutting cycle were identified and 131cycles were recorded. Effective factors such as tree diameter at cutting stump height, travel distance between cut trees, longitudinal and side slope were recorded. Based on data analyzed and the statistical model developed the following results were obtained:
The best model of cutting time is a function of independent variables such as the tree diameter at cutting stump height, travel distance between cutting trees, and the longitudinal slope independent variables. The validity of the model was examined and was verified at 95%. The number of cut trees per hour (production rate) with and without delay time was 10 and 13 and the production cost 23,343 and 18,424 Rials respectively. The study of change in each variable on cutting times and respected costs displayed direct linear changes. The delay times had the highest rank after making under cut and back cut.