Skip to Main Content
Wood density-moisture profiles in old-growth Douglas-fir and western hemlock.Author(s): W.Y. Pong; Dale R. Waddell; Lambert Michael B.
Source: Res. Pap. PNW-RP-346. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 36 p
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
Download Publication (1.71 MB)
DescriptionAccurate estimation of the weight of each load of logs is necessary for safe and efficient aerial logging operations. The prediction of green density (lb/ft3) as a function of height is a critical element in the accurate estimation of tree bole and log weights. Two sampling methods, disk and increment core (Bergstrom xylodensimeter), were used to measure the density-moisture complex in wood. The relationship between wood density and height was best described by either quadratic or cubic polynomial functions. Prediction functions for green and dry wood density are presented for old-growth western hemlock and Douglas-fir. Sapwood and heartwood functions were analyzed separately as were trees with and without heartrot.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationPong, W.Y.; Waddell, Dale R.; Lambert Michael B. 1986. Wood density-moisture profiles in old-growth Douglas-fir and western hemlock. Res. Pap. PNW-RP-347. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 36 p
Keywordswood density, moisture content (wood), old-growth stands, Douglas-fir, western hemlock
- Estimating the weight of crown segments for old-growth Douglas-fir and western hemlock.
- Moisture distributions in western hemlock lumber from trees harvested near Sitka, Alaska.
- Western hemlock as a veneer resource.
XML: View XML