Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Jones, Paul D.
Committee Member
Seale, R. Daniel
Committee Member
Shmulsky, Rubin
Date of Degree
12-15-2012
Document Type
Graduate Thesis - Open Access
Major
Forest Products
Degree Name
Master of Science
College
College of Forest Resources
Department
Department of Forest Products
Abstract
Over the last several years questions about the strength of structural lumber have been raised. The purpose of this study was to examine the relationship between physically measured wood properties using Near Infrared spectroscopy. Physical properties were determined from (2 x 4 x 2 in.) cut samples. Destructive mechanical testing was performed on 744; 8 feet long, No.2 grade 2x4’s. Diffuse reflectance NIR spectra was collected from the cross-sectional face of each block using FOSS NIR Systems Inc. Model 5000 scanning spectrometer. Calibrations were then created between measured properties and NIR estimates. Density, specific gravity, latewood percentage, MOE and MOR had coefficient of determinations of 0.78, 0.56, 0.02, 0.56, and 0.48 respectively. The low correlation is likely caused by the grade of lumber. Because No.2 lumber has considerable knots, they were the determining factor in strength and stiffness; these results would likely not be similar in a higher grade lumber.
URI
https://hdl.handle.net/11668/18971
Recommended Citation
Diaz, Ignacio, "Rapid Non-Destructive Assessment of Southern Yellow Pine Lumber Properties by Near Infrared Spectroscopy" (2012). Theses and Dissertations. 3718.
https://scholarsjunction.msstate.edu/td/3718
Comments
Visual Grading Near Infrared Spectroscopy