History of lumber submissions under ASTM D 1990 since the North American In-Grade testing program
The North American In-Grade Testing Program, begun in the mid-1970s, tested more than 70,000 full-size specimens of North American production lumber representative of the total specimen population throughout the geographic range of production. Methods for developing allowable properties from this type of program are incorporated in two ASTM International standards, D 4761 and D 1990 (adopted in 1988 and 1991, respectively). These standards have become the template by which allow-able properties for visually graded dimension lumber are developed. Some areas in the standard were intentionally left vague at the time of adoption, and other sections did not anticipate future varied uses of this standard. As a result, a number of interpretations of D1990 have been required over the past 19 years of use, for both domestic and foreign species-based allowable property submissions. Forest Product Laboratory scientists have conducted a technical review of the majority of these submissions and suggested methods allowing for calculation of allowable properties for circumstances not fully covered by D 1990.
The American Lumber Standard Committee Board of Review (ALSC BOR) contracted with U.S. Department of Agriculture Forest Service, Forest Products Laboratory (FPL), to compose a General Technical Report that chroni�cles the history of submissions to the ALSC BOR reviewed by the FPL since the adoption of D 1990. These submissions have produced additional design values, beyond those produced in the In-Grade Program, for 28 country species combinations in Europe, 1 from Africa, 2 from South America and 4 from North America.
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