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Memorias de investigación
Artículos en revistas:
Visual grading of large structural coniferous sawn timber according to Spanish Standard UNE 56544
Año:2007
Áreas de investigación
  • Materiales de construccion,
  • Ingeniería de construcción
Datos
Descripción
Visual grades of large section structural sawn timber from Spanish coniferous species are studied in-depth in this study. Timber pieces had a cross section from 150 x 200 mm to 200 x 250 mm and were visually graded according to the visual Spanish standard in force, UNE 56544 (2003). The efficacy of this test was analysed. The results according to this visual standard give very low output with an excessive percentage of rejected pieces. Furthermore, visual grading standard does not make it possible to clearly separate the mechanical properties of the different visual grades and rejected pieces. Due to this, modifications are proposed to some of its specifications with the aim of reducing the percentage of rejections and even to stimulate discussion in the Spanish standardization Committee about the creation of a special group of visual grades for timber pieces with thicknesses larger than 70 mm. The physical and mechanical properties (density, bending strength and stiffness) of 395 sawn pieces of radiata pine (Pinus radiata D. Don), redwood pine (Pinus sylvestris L.) and laricio pine (Pinus nigra Arn. ssp. salzmannii) from Spain were estimated using the EN 408 (2003) test standard. Statistical analyses of those properties, demonstrate that special treatment for visually graded large sections is justified and investigations of visual standards from other countries corroborate it. A new visual grade is suggested, MEG (Large Structural Timber), and its mechanical properties and visual specifications are defined.
Internacional
Si
JCR del ISI
Si
Título de la revista
FOREST PROD J
ISSN
0015-7473
Factor de impacto JCR
0,351
Información de impacto
Volumen
57
DOI
Número de revista
10
Desde la página
45
Hasta la página
50
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Participante: David Barrett (British Columbia University)
  • Autor: Guillermo Iñiguez Gonzalez (UPM)
  • Autor: Francisco Arriaga Martitegui (UPM)
  • Autor: Miguel Esteban Herrero (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Construcción con Madera
  • Departamento: Construcción y Vías Rurales
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