Mechanical Properties of Red Maple Structural Lumber
Keywords:
Red maple, mechanical properties, bending, tension parallel to grain, compression parallel to grain, mechanical gradingAbstract
Efficient utilization of hardwood structural lumber depends on developing better procedures of grading and property assignment. In this study, we evaluated the properties of red maple 2- by 4-in. (standard 38- by 89-mm) lumber tested in bending and in tension and compression parallel to the grain and compared the results to published values derived by ASTM D 245 clear wood procedures. The results indicate that significant increases in allowable properties could be obtained using procedures based on tests of full-size lumber. The results also demonstrate that the relationships between lumber strength in compression parallel to grain and bending strength and between tension parallel to grain and bending strength are similar to those for softwood species. Thus, procedures used to assign properties to mechanically graded softwood species should be applicable to red maple.References
ASTM. 1991. Annual book of standards, vol. 04.08, Wood. Philadelphia, PA.nASTM. 1991a. Standard test methods of static tests of timbers in structural sizes. ASTM D 198.nASTM. 1991b. Standard methods for establishing structural grades and related allowable properties for visually graded lumber. ASTM D 245.nASTM. 1991c. Standard methods for establishing clear wood strength values. ASTM D 2555.nASTM. 1991b. Standard test methods for mechanical properties of lumber and wood based structural material. ASTM D 4761.nASTM. 1991e. Standard practice for establishing allowable properties for visually graded dimension lumber from in-grade tests of full size specimens. ASTM D 1990.nAppiah, S. K. 1984. A case for machine grading of lesser-known timber species in Ghana. Technical Bulletin of the Forest Products Research Institute, vol. 4.nBendtsen, A., and W. L. Galligan. 1978. Deriving allowable properties of lumber (a practical guide for interpretation of ASTM Standards). General Technical Report GTR-20. USDA Forest Service, Forest Products Laboratory, Madison, WI.nCollins, M. J., and A. Amin. 1990. Investigation of machine grading of Malaysian tropical hardwoods. Pages 827-833 in Proceedings of the 1990 International Timber Conference, 1990 October 23-25, Toyko, Japan.nDebonis, A. L., and B. Alan Bendtsen. 1988. Design stresses for hardwood structural grades create new opportunities. Pages 48-50 in Executive Summaries; 43rd Annual Meeting, Forest Products Research Society. Reno, NV. Forest Products Research Society, Madison, WI.nDoyle, D. V., and L. J. Markwardt. 1966. Properties of southern pine in relation to strength grading of dimension lumber. Research Paper FPL-64. USDA Forest Service, Forest Products Laboratory, Madison, WI.nDoyle, D. V., and L. J. Markwardt. 1967. Tension parallel-to-grain properties of southern pine dimension lumber. Research Paper FPL-84. USDA Forest Service, Forest Products Laboratory, Madison, WI.nFaust, T. D., R. H. McAlister, and S. J. Zarnoch. 1991. Strength and stiffness properties of sweetgum and yellow-poplar structural lumber. Forest Prod. J. 40(10): 58-64.nGalligan, W. L., D. Snodgrass, and G. Crow. 1978. Machine stress rated lumber: Practical concerns and theoretical restraints. General Technical Report FPL-7. USDA, Forest Service, Forest Products Laboratory, Madison, WI.nGibbons, J. D. 1976. Nonparametric methods of quantitative analysis. Holt, Rinehart and Winston, New York, NY. 463 pp.nGreen, D. W., and J. W. Evans. 1987. Mechanical properties of visually graded lumber, vol. 1: A summary. Publication PB-88-159-389. National Technical Information Service, USDA, Springfield, VA.nGreen, D. W., and D. E. Kretschmann. 1991. Lumber property relationships for use in engineering design codes. Wood Fiber Sci. 23(3):436-456.nGreen, D. W., and K. A. McDonald. 1993. Investigation of the mechanical properties of red oak 2 by 4's. Wood Fiber Sci. 25(1):35-45.nGreen, D. W., B. E. Shelley, and H. P. Vokey. 1989. Proceedings: In-grade testing of structural lumber. Forest Products Laboratory, Madison, WI. April 1988. Proceedings 47363. Forest Products Research Society, Madison, WI.nMcDonald, K. A., J. Dwyer, J. Whipple, and D. Green. In process. Red maple stress-graded 2 by 4 dimension lumber from factory-graded logs. Submitted to Forest Prod. J.nNFPA. 1991. Design values for wood construction: A supplement to the national design specifications. National Forest Products Association.nNELMA. 1991. Standard grading rules for northeastern lumber. Northeastern Lumber Manufacturer's Association.nRoos, K. D., J. E. Shottafer, and R. K. Shepard. 1990. The relationship between selected mechanical properties and age in quaking aspen. Forest Prod. J. 40(7/8):54-56.nSenft, J., and R. M. D. Lucia. 1979. Increased utilization of tropical hardwoods through species-independent structural grading. Forest Prod. J. 29(6):22-28.n
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