This research was developed with data collected in areas of wood harvesting by three companies of the State of Minas Gerais, Brazil. The general objective was to evaluate the level of noise, light and heat of forest harvesting machines. The work stations of the following machines were evaluated: Feller-Buncher, Skidder, Bucking Tongs, Mechanical Bucking and Forest Loader. The noise levels were measured with the use of a dosimeter, the light with a digital luximeter and the heat exposure with the IBUTG. At company 1, the two evaluated forest tractors, while stopped, presented the same level of noise, both had internal lighting and good thermal conditions. At company 2, for the three evaluated machines, the level of noise was below the limits recommended by the NR 15. The cabins had internal light and thermal regulation. At company 3, all the machines showed noise levels above those allowed by the Brazilian legislation. The forest loader and the mini-skidder showed poor lighting and the indexes of effective temperature were outside the thermal comfort zone for all machines. It is concluded that all the machines used by company 3 are ergonomically non-complient.
work conditions; ergonomy; environmental risks