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Title: An Evaluation of a Proposed Revision of the ASTM D 1990 Grouping Procedure

Author: Verrill, Steve P; Evans, James W.; Kretschmann, David E.; Hatfield, Cherilyn A.;

Date: 2013

Source: USDA Forest Service, Forest Products Laboratory, Research Paper, FPL-RP-671, 2013. 36 p.

Publication Series: Research Paper (RP)

Description: Lum, Taylor, and Zidek have proposed a revised procedure for wood species grouping in ASTM standard D 1990. We applaud the authors’ recognition of the importance of considering a strength distribution’s variability as well as its fifth percentile. However, we have concerns about their proposed method of incorporating this information into a standard. We detail these concerns in this paper. We also provide both theoretical and empirical arguments that suggest that revisions of the standard should not be based on a two-parameter Weibull assumption.

Keywords: Reliability, modulus of rupture, modulus of elasticity, bivariate Gaussian−, Weibull, pseudo-truncated Weibull, Weibull

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Verrill, Steve P; Evans, James W.; Kretschmann, David E.; Hatfield, Cherilyn A. 2013. An evaluation of a proposed revision of the ASTM D 1990 grouping procedure. Res. Pap. FPL-RP-671. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 36 p.


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