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Investigating Mechanical Properties of Structural Lumber from Thinned Japanese Cedar in Taiwan

This study explores the mechanical properties and grading of structural lumber from thinned logs of Japanese cedar grown in Taiwan. Utilizing visual grading and mechanical stress grading techniques, the research assesses the stiffness and modulus of rupture (MOR) using edgewise transversal vibration and bending test methods. The findings indicate that the vibration technique is effective for on-line mechanical stress grading, and establish allowable bending stress values, promoting efficient use of timber resources to meet structural requirements in construction.

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Investigating Mechanical Properties of Structural Lumber from Thinned Japanese Cedar in Taiwan

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  1. Forest Product and Environment: A Productive Symbiosis Department of Natural Resources National I-Lan University 2007 IUFRO Division 5 Conference Taipei5.02.00 Physiomechanical properties of wood and wood-based materials and their application Chih-LungCho

  2. Forest Product and Environment: A Productive Symbiosis Department of Natural Resources National I-Lan University Mechanic Properties of Structural Lumber Produced from Thinned Wood of Japanese Cedar Grown in Taiwan Chih-Lung Cho*, Li Chwen Lin, Jiunn Haur Chen, Huey Lan Wang National I-Lan University Department of Natural Resources No. 1, Sec. 1, Shen-Lung Rd. 260, I-Lan Taiwan, R.O.C

  3. Aim of study and methods In order to understand the mechanic properties and lumber grade of structural lumber produced from thinned log of Japanese cedar grown in Taiwan by using: • Visual grading and mechanical stress grading • Edgewise transversal vibration and bending test methods for measuring stiffness and MOR of lumber Department of Natural Resources National I-Lan University

  4. Results Mechanical properties of visual and mechanical stress grade lumber Department of Natural Resources National I-Lan University

  5. Conclusions • Vibration technique is suitable used for on-line mechanical stress grading operation system. • Establishment of allowable bending stress of Japanese cedar could make more efficient use of the available timber resource in meeting timber structure requirements. Department of Natural Resources National I-Lan University

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