Skip to Main Content
Structural lumber from dense stands of small-diameter Douglas-fir trees.Author(s): David W. Green; Eini C. Lowell; Roland Hernandez
Source: Forest products journal. 55, nos. 7/8 (July/Aug. 2005): Pages 42-50.
Publication Series: Miscellaneous Publication
PDF: View PDF (238 KB)
DescriptionSmall-diameter trees growing in overstocked dense stands are often targeted for thinning to reduce fire hazard and improve forest health and ecosystem diversity. In the Pacific Northwest and Intermountain regions, Douglas-fir can be a predominant species in such stands. In this study, mechanical properties and grade yield of structural products were estimated for 2 by 4 lumber cut from logs of small-diameter Douglas-fir trees from a stand in northern California. The results indicate that 70- to 90-year-old suppressed Douglas-fir has excellent potential for the production of all structural lumber products. Grade recovery was determined using five grading systems. When graded as Structural Light Framing, 68 percent of the lumber made Select Structural as Light Framing, 74 percent made Construction grade, 89 percent made STUD grade, 90 percent made 2400Fb-2.0E under machine stress rating rules, and 46 percent would qualify as stock for glue laminated beams. Care must be taken in kiln-drying to avoid the commonly observed problem of twist.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGreen, David W.; Lowell, Eini C.; Hernandez, Roland. 2005. Structural lumber from dense stands of small-diameter Douglas-fir trees. Forest products journal. 55, nos. 7/8 (July/Aug. 2005): Pages 42-50.
KeywordsDouglas-fir, small-diameter, structural lumber, stand density
- Effect of rotation age and thinning regime on visual and structural lumber grades of Douglas-fir logs
- Structural lumber from suppressed-growth ponderosa pine from northern Arizona.
- Volume recovery, grade yield, and properties of lumber from young-growth sitka spruce and western hemlock in southeast Alaska.
XML: View XML