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- 2009416089 abstract "Log moisture content has an important impact on many aspects of log home construction, including log processing, transportation costs, and dimensional stability in use. Air-drying times for house logs from freshly harvested trees can depend on numerous factors including initial moisture content, log diameter, bark condition, and environmental conditions during drying. In this study, we evaluated air-drying properties of young-growth Sitka spruce (Picea sitchensis (Bong.) Carr) and of western hemlock (Tsuga heterophylla (Raf.) Sarg.) from logs harvested in southeast Alaska. For each species, we considered inside storage in a warehouse vs. outside storage, as well as debarked logs vs. logs with bark remaining, resulting in four experimental treatments. We considered moisture losses after 8 and 12 months of air drying. There was considerable moisture loss for Sitka spruce logs, and much of the drying occurred during the first 8 months. Fastest drying rates for both species were for peeled logs with inside storage. Western hemlock logs showed higher moisture content and greater moisture content variation (vs. Sitka spruce), and in most cases would require additional drying beyond the 12-month study period to produce satisfactory house logs. Results of this study are significant because they can help entrepreneurs determine appropriate levels of capital investment (e.g., land, covered storage, debarking equipment), as well as whether to dry and process logs in southeast Alaska vs. some other location. This study found that a leading option for local producers would be to peel Sitka spruce logs, then air dry indoors for between 8 and 12 months. Another effective strategy would be to peel western hemlock logs, then air dry indoors for 12 months.".
- 2009416089 contributor B11586746.
- 2009416089 contributor B11586747.
- 2009416089 contributor B11586748.
- 2009416089 created "[2009]".
- 2009416089 date "2009".
- 2009416089 date "[2009]".
- 2009416089 dateCopyrighted "[2009]".
- 2009416089 description "Includes bibliographical references (p. 14-16).".
- 2009416089 description "Log moisture content has an important impact on many aspects of log home construction, including log processing, transportation costs, and dimensional stability in use. Air-drying times for house logs from freshly harvested trees can depend on numerous factors including initial moisture content, log diameter, bark condition, and environmental conditions during drying. In this study, we evaluated air-drying properties of young-growth Sitka spruce (Picea sitchensis (Bong.) Carr) and of western hemlock (Tsuga heterophylla (Raf.) Sarg.) from logs harvested in southeast Alaska. For each species, we considered inside storage in a warehouse vs. outside storage, as well as debarked logs vs. logs with bark remaining, resulting in four experimental treatments. We considered moisture losses after 8 and 12 months of air drying. There was considerable moisture loss for Sitka spruce logs, and much of the drying occurred during the first 8 months. Fastest drying rates for both species were for peeled logs with inside storage. Western hemlock logs showed higher moisture content and greater moisture content variation (vs. Sitka spruce), and in most cases would require additional drying beyond the 12-month study period to produce satisfactory house logs. Results of this study are significant because they can help entrepreneurs determine appropriate levels of capital investment (e.g., land, covered storage, debarking equipment), as well as whether to dry and process logs in southeast Alaska vs. some other location. This study found that a leading option for local producers would be to peel Sitka spruce logs, then air dry indoors for between 8 and 12 months. Another effective strategy would be to peel western hemlock logs, then air dry indoors for 12 months.".
- 2009416089 extent "18 p. :".
- 2009416089 hasFormat "Also available on the World Wide Web.".
- 2009416089 identifier pnw_gtr782.pdf.
- 2009416089 isFormatOf "Also available on the World Wide Web.".
- 2009416089 isPartOf "General technical report PNW ; 782.".
- 2009416089 isPartOf "General technical report PNW ; GTR-782".
- 2009416089 issued "2009".
- 2009416089 issued "[2009]".
- 2009416089 language "eng".
- 2009416089 publisher "Portland, OR : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station,".
- 2009416089 relation "Also available on the World Wide Web.".
- 2009416089 spatial "Alaska, Southeast.".
- 2009416089 subject "691/.1 22".
- 2009416089 subject "Log cabins Materials Drying Alaska, Southeast.".
- 2009416089 subject "Sitka spruce Drying Alaska, Southeast.".
- 2009416089 subject "Softwood Drying Alaska, Southeast.".
- 2009416089 subject "TS837 .N485 2009".
- 2009416089 subject "Western hemlock Drying Alaska, Southeast.".
- 2009416089 title "House log drying rates in southeast Alaska for covered and uncovered softwood logs / David Nicholls and Allen Brackley.".
- 2009416089 type "text".