Grading options for Western hemlock pulpwood logs from southeastern Alaska Download PDF EPUB FB2
Obtained from lower quality western hemlock “pulpwood” logs. A total of logs were selected at random from inventory at a southeastern Alaska mill. The Puget Sound Log Scaling and Grading Bureau graded 89% of these logs as No. 3 or No.
4, 4% as No. 2, and 7% as “culls.” The culls could not be processed in a commercial sawmill. The information shows that significant amounts of higher grade structural lumber can be produced from these lower grade logs. Citation: Green, David W.; McDonald, Kent A.; Dramm, John.; Kilborn, Kenneth.
Grading options for western hemlock "pulpwood" logs from southeastern Alaska. (Research paper FPL ; RP) p. ; 28 cm. Grading options for Western hemlock "pulpwood" logs from Southeastern Alaska (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: David W Green; Forest Products Laboratory (U.S.).
Grading options for western hemlock "pulpwood" logs from southeastern Alaska. Properties and grade yield are estimated for structural lumber produced from No. 3, No. 4, and low-end No. 2 grade western hemlock (Tsuga heterophylla) logs of the type previously used primarily for the production of pulp by: 2.
Four hundred and nine logs were selected at random from inventory at a mill in Southeast Alaska. Eighty nine percent of the logs graded as either No. 3 or No.
4 by the Puget Sound Log Scaling and Grading Bureau. Four percent of the logs graded as No. 2 and 7% as “cull” logs. The culls could not be processed in a commercial sawmill.
The Possibility of Using New Silvicultural Systems in Hemlock-Spruce Stands in Southeast Alaska: A Retrospective Perspective. 27 Robert L. Deal Timber Merchandising Systems and Timber Sale Implications: Grading Options for Western Hemlock Pulp Logs. 73 David Green, Kent A.
McDonald, John Dramm, Kenneth Kilborn Alaskan Forest. Book. Jan ; James W Evans. Richard Arnold Johnson Grading Options for Western Hemlock "Pulpwood" Logs From Southeastern Alaska.
Article. Grading Options for Western Hemlock "Pulpwood. The sample included trees from commercially thinned and unthinned stands and fluted western hemlock logs obtained from a sort yard. Mean cubic recovery of lumber volume from all sawn logs was Logs are sent to the sawmill where the outer layer is ground away.
Larger logs are slabbed and sawn to create 2x4s and other small dimension lumber. Smaller logs in the load are chipped for fuel or paper pulp. Although CNS products don’t fetch as high a value as poles, ply, or sawtimber, they tend to be valued higher than pulpwood.
Pulpwood. western hemlock logs is lower for any small-end log diameter beach logs in southeast Alaska: Suitability for lumber, pulp, and energy. Portland, OR. 25 p. F AHEY, T.D. Product. Nine western hemlock logs were sampled from three trees that had been harvested near Sitka, Alaska, in November The logs were stored outside until being sawn into lumber in June Log diameter ranged from approximately 10 to 18 inches (small end, inside bark).
southeast can be the basis for economic development. Efforts to establish pulp mills occupied much of the 20 th century (Durbin and Smith provide useful overviews of the development of the timber industry in southeast Alaska). The closure of the last remaining pulp mill in Alaska in has focused attention on softwood logs and soft.
Alaska Timber Industry History Southeast Alaska Summary From the purchase of Alaska until after the proclamation establishing the Tongass National Forest, only small amounts of the timber resources in Southeast Alaska were harvested for local use. Subsequent to. Recently dead and older dead logs from 5 beaches and live logs of Picea sitchensis and Tsuga heterophylla were sawn at a cant mill in SE Alaska and a dimension mill in northern Washington.
Vol. recovery was similar for the live and recently dead samples, but less vol. was recovered from the older dead logs. lumber value was the same for all samples for each species at the cant mill.
conditions found in southeast Alaska (Harris and Farr, ). The thin bark and poor decay resistance of western hemlock (Tsuga heterophylla) and-Sitka spruce (Picea sitchensis) make them susceptible to logging damage and subsequent wound infection by decay fungi, greatly increasing the risk associated with.
desired for western hemlock and 90 percent for Sitka spruce. The higher confidence was desired for Sitka spruce because it is used in a greater number of bridges. The required sample sizes for these two species were 15 western hemlock logs and 22 Sitka spruce. However, extra Sitka spruce logs were delivered to the site, and 25 were actually tested.
Hemlock woolly adelgid is mainly present in the range of eastern hemlock extending from northern Georgia to southern Maine and from northern California to southeast Alaska.
However, it has been discovered along Lake Michigan in the western lower peninsula of Michigan. In Asia. The purpose of this research was to quantify what value could be gained from cutting solid wood products from old-growth western hemlock (Tsuga heterophylla (Raf.) Sarg.) logs that are used to produce pulp in British Columbia.
These logs represent a significant portion of the resource and increasing their value recovery would be beneficial to the forest industry. One hundred and sixteen logs.
Alaska Hemlock (only within southeast Alaska) has a dense, even growth ring pattern that averages 26 growth rings per inch with about 25% summer wood. The finished wood is odorless, tasteless, and non-resinous when dried.
The mature Alaska Hemlock trees within southeast Alaska grow between 2 to 5 feet in diameter and up to feet in height. Lumber sawn from young-growth Sitka spruce and western hemlock in southeast Alaska appears to be best suited for structural light framing or molding and millwork based on visual grading rules and mechanical properties observed.
In this study, which applied export standards, more than 90 percent of the lumber was graded as No. 2 or better. The Possibility of Using New Silvicultural Systems in Hemlock-Spruce Stands in Southeast Alaska: A Retrospective Perspective.
27 Robert L. Deal Timber Merchandising Systems and Timber Sale Implications: Grading Options for Western Hemlock Pulp Logs. 73 David Green, Kent A. McDonald, John Dramm, Kenneth Kilborn Alaskan Forest. Efforts by government and the private sector to establish a pulp industry in southeast Alaska began shortly after World War I but did not succeed until the early s.
provided a mix of high-quality saw logs and lower-grade saw and utility logs. Before the closure of the two southeast Alaskan pulp mills, a local market existed for all. USDA Forest Service, Paciﬁc Northwest Research Sta*on, Alaska Wood U*liza*on and Research Sta*on, Siginaka Way, Sitka, AK Bannister, J.; Cur*s, K.
Determina*on of the NGR grade lumber design values for Alaska hemlock (Tsuga species) by in‐grade. Sitka spruce and Western hemlock beach logs in southeast Alaska: suitability for lumber, pulp, and energy Item Preview remove-circle Share or Embed This Item.
DOWNLOAD OPTIONS download 1 file. ABBYY GZ download. download 1 file. ber. That is why high-grade logs have a higher value. An example is given in the table below. Log Grading Methods Unlike lumber grading, there is no one system that is widely accepted for grading logs.
The United States Forest Service has de-veloped a log grading system based on the yield of “clear cuttings” from faces of the log. The maximum knot size for a Special Mill grade log is 1 ½” (2 larger knots are Pulp 19 Hemlock - Long (26 - 40') Diameter Sort 8 - 11" 31 12" Plus 26 - 30' 34 12" Plus 32 - 40' 35 Just because these logs are called “PULP” does not mean that they are culls.
The supply of western hemlock in the United States and Alaska, as shown by Figure 3, is exceeded only by the supplies of two other species, namel}^, Douglas fir and western yellow pine.^ The stand of Douglas fir is estimated to be about two and three-fifths times as large as that of western hemlock; that of western yellow pine is.
The Future of the Timber Industry in Southeast Alaska: A Conference Held at University of Alaska Southeast, Ketchikan, Janu University of Alaska Southeast - pages 0 Reviews. hemlock beach logs in southeast Alaska: being assigned under that grading system.
Value loss increased with log diameter. in south central Alaska showed no difference in pulp yield between. Get this from a library. Stand-density study of spruce-hemlock stands in southeastern Alaska. [Donald J DeMars; Pacific Northwest Research Station (Portland, Or.)]. Most of the Sitka spruce harvested was saw log quality or better (70%), whereas much of the hemlock harvest was classified as low-grade saw logs or utility logs (%).
Southeast Alaska is the major supplier of Sitka spruce (70% of North American production in ), but only a minor supplier of hemlock (17% of total western hemlock production.Alaska Specialty Woods has one primary source for all material acquisitions.
Whether the wood comes from old log floats, old log bridges or from a wind-fell tree in the forest, all of it is from the beautiful and ancient Tongass National Forest (TNF). The Tongass is often referred to as the “crown jewel of the National Forest System”.When I counted the growth rings of the Sitka spruce and Western hemlock in Alaska, I was disappointed to find out that they were a mere years old, plus or minus 15 years.
This was an even-aged stand of timber that regenerated after a large die off of the original timber.