Avaliação biomecânica do arraste de madeira com a utilização de máquinas adaptadas

Abstract

The aim of this study was to perform a biomechanical assessment of wood skidding using adapted machines in order to identify the ergonomic hazards to which workers are exposed. Data were collected from a forestry company in Santa Maria das Barreiras, Pará, which used an agricultural tractor coupled with a mini skidder to skidding wood. Biomechanical conditions of work were assessed by applying a checklist for simplified assessment of biomechanical conditions of the workplace. For biomechanical evaluation, the Three-Dimensional Static Strength Prediction ProgramTM (3DSSPPTM) from the University of Michigan was used. The results showed no risk of injury to the workers' spin The results showed that the machine evaluated presented a bad ergonomic pattern, but did not show risk of injury to the workers' spine, although there is a high probability of injury to the lower limbs (knees and ankles) and upper (shoulders), this is greater in the phase of activity that consists in the coupling of trees and their extraction, due to forced, inadequate postures and for long periods of time. Thus, it is concluded that the use of machines adapted for wood dragging presents a high biomechanical risk of RSI/WRMD development in workers and that this risk is mainly associated with repetitive flexion movements associated with trunk rotation and static and asymmetrical working postures.