Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Shmulsky, Rubin

Committee Member

Seale, R. Dan

Committee Member

Kretschmann, David E.

Date of Degree

5-6-2016

Original embargo terms

MSU Only Indefinitely

Document Type

Graduate Thesis - Campus Access Only

Major

Sustainable Bioproducts

Degree Name

Master of Science

College

College of Forest Resources

Department

Department of Sustainable Bioproducts

Abstract

The processing of southern yellow pine (Pinus spp.) (SYP) trees into dimensional lumber is a multi-billion dollar industry in the Southeast United States. The finished product is subject to a classic strength assessment procedure known as visual grading. In this study, 484 specimens of No.2 2 inch by 8 inch (nominal) SYP dimensional lumber were visually assessed for strength reducing defects, visually graded by a certified lumber grader, and destructively tested. Destructive testing was performed in accordance with ASTM D4761-13 for modulus of rupture (MOR) and modulus of elasticity (MOE). These results were used to identify parameters which could be significant when developing a potential working stress-class system to improve the efficiency and yield of the specified grade. Six specific visual characteristics were identified that could predict a superior quality product when compared to the current strength and stiffness properties of No.2 2 by 8 lumber.

URI

https://hdl.handle.net/11668/17619

Comments

southern yellow pine||lumber||machine grading||visual grading

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