Rendimiento volumétrico e importancia del control de calidad de madera aserrada de Pinus spp.
Volumetric timber production and importance of sawn lumber quality control of Pinus spp.
DOI:
https://doi.org/10.54167/tch.v12i1.132Keywords:
green target size, lumber size control, lumber thickness variation, sawn woodAbstract
Most sawmills in the state of Michoacán classify their wood by visual evaluation (number of defects) which has caused a low quality in wood from the sawmills. A complete evaluation of this wood is carried out by the variation of the lumber cut thickness (St). Therefore, the objective of this work was to evaluate the quality of sawn wood and to estimate the economic impact of the sawn wood quality in a sawmill in the state of Michoacan. The St and the yield were determined in a sawmill in boards with 19 mm as nominal thickness. The sample consisted of 100 boards in five widths and in each board eight points of thickness were measured. The St was 0.99 mm with an average thickness of 25.4 mm and an optimum thickness of 26.2 mm. Thirty nine boards had one or more points with a thickness smaller than the minimum required and accounted for 43.2 % of rejection and represent an economic loss of 3.66 %. This loss is not due to problems in the carriage or in the saw head according to the within-board (Sw) and between-board variation (Sb). The data shows a low quality of sawn wood and an economic loss that it can rise up to 25% in the sawmill of this study.
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