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• W1599957247 abstract "Este trabalho teve por objetivo realizar a avaliacao tecnica de um carregador florestal na operacao de carregamento com diferentes sortimentos de madeira. Os dados foram coletados em areas de colheita de madeira de uma empresa florestal na regiao Sul do Brasil, no carregamento de toras de Pinus taeda e Eucalyptus grandis . A analise tecnica abordou o estudo de tempos e movimentos, onde a operacao de carregamento foi dividida em fases do ciclo de trabalho, analisadas individualmente. Para analise dos dados consideraram-se como tratamentos os diferentes tipos e comprimentos de toras e, como repeticao, o numero de veiculos. Os dados foram submetidos ao Teste de Bartllet para verificacao da homogeneidade das variâncias dos tratamentos e (submetidos) a Analise de Variância. Os resultados mostraram que os elementos arrumacao de pilha e arrumacao de carga contribuiram juntos com mais de 70% do tempo total do ciclo operacional; estes foram influenciados pela baixa qualidade das pilhas de madeira localizadas nas margens das estradas. O tempo total medio da operacao de carregamento foi de dezoito minutos, equivalente a uma produtividade media de 140,7 toneladas por hora efetiva de trabalho e eficiencia media 31,8%. A eficiencia no carregamento das toras de comprimento de 5,30 m foi superior ao carregamento de toras de menor comprimento. Abstract The research objective was to technically assess a forestry loader in the operation of loading different assortments of wood. The data were collected at wood harvest areas of a forest company in the South Region of Brazil, during the log loading of Pinus taeda and Eucalyptus grandis. The technical analysis included a motion and time study. The log loading operation was divided into phases of the job cycle, which were analyzed individually. For the purposes of data analyses, the different log types and lengths were considered as treatments, and the amount of vehicles as repetitions. The data were submitted to the Bartllet Test in order to verify the variance homogeneity of the treatments that were the object of Variance Analysis. The results showed that the treatments of log pile arrangement and load arrangement contributed together in more than 70% of the total operational cycle, and were both influenced by the poor quality of wood piles at the road sides. The average total time of the log loading operation was 18 minutes, equivalent to an average productivity of 140,7 tons per effective work hour and average efficiency of 31,8%. The loading efficiency of logs with a length of 5,30 m was superior to the loading of logs with a shorter length." @default.
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• W1599957247 date "2009-04-01" @default.
• W1599957247 modified "2023-09-23" @default.
• W1599957247 title "Avaliação técnica de um carregador florestal com diferentes sortimentos de madeira / Technical assessment of a forest loader with different assortments of wood" @default.
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