TECHNICAL NOTES
Dec 1, 1992

Moisture Content and Reliability‐Based Design for Wood Members

Publication: Journal of Structural Engineering
Volume 118, Issue 12

Abstract

The effect of moisture content on the reliability of structural wood members is examined, and possible code provisions to account for such effects are presented. Specifically, the effect of assuming one moisture content for design and using the member at a different moisture content is considered. This is of particular interest since one set of design values for a single moisture content classification are likely to be available to the designer. Data from the in-grade test program are used to investigate the effects of different types of uncertainty. This study suggests whether empirical modifications to strength values such as those in current design specifications for wood construction are appropriate for use in a limit-states design format, or whether new adjustment factors based on probabilistic analyses are warranted. The implications for codified design are presented in the context of the ongoing development of load- and resistance-factor design specification for wood construction.

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References

1.
Fridley, K. J., Tang, R. C., Soltis, L. A., and Yoo, C. H. (1992). “Hygrothermal effects on load‐duration behavior of structural lumber.” J. Struct. Engrg., ASCE, 118(4), 1023–1038.
2.
Gerhards, C. C. (1988). “Effect of grade on load duration of Douglas‐fir lumber in bending.” Wood and Fiber Sci., 20(1), 146–161.
3.
Green, D. W., and Evans, J. W. (1987). Mechanical properties of visually graded lumber. Vols. 1–5, Forest Service, Forest Products Lab., U.S. Dept. of Agric, Madison, Wisc.
4.
Load and resistance factor design for engineered wood construction—A prestandard report. (1988). J. F. Murphy, ed., ASCE, New York, N.Y.
5.
Load and resistance factor design specifications for engineered wood construction. (1991). Draft, ASCE, New York, N.Y., Jul.
6.
“Minimum design loads for buildings and other structures.” (1990). ASCE 7‐88, ASCE, New York, N.Y.
7.
National design specification for wood construction. (1986). Nat. Forest Products Assoc., Washington, D.C.
8.
Rosowsky, D. V., and Ellingwood, B. R. (1990). “Stochastic damage accumulation and probabilistic codified design for wood.” Civil Engineering Report No. 1990‐2‐02, Johns Hopkins Univ., Baltimore, MD.

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Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 118Issue 12December 1992
Pages: 3466 - 3472

History

Published online: Dec 1, 1992
Published in print: Dec 1992

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Authors

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David V. Rosowsky
Asst. Prof., School of Civ. Engrg., Purdue Univ., 1284 Civ. Engrg. Bldg., West Lafayette, IN 47907
Kenneth J. Fridley, Associate Members, ASCE
Asst. Prof., School of Civ. Engrg. and Envir. Sci., Univ. of Oklahoma, Norman, OK 73019

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