Product Recovery From Hemlock "Pulpwood" From Alaska.

Thomas D. Fahey

doi:10.2737/PNW-RP-303

Treesearch

Product Recovery From Hemlock "Pulpwood" From Alaska.

Informally Refereed

Authors:

Thomas D. Fahey

Year:

1983

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-303

Source:

Res. Pap. PNW-RP-303. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 28 p

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Download (PDF 1.94 MB): https://research.fs.usda.gov/download/treesearch/25186.pdf

Abstract

A total of 363 western hemlock (Tsuga heterophylla (Raf.) Sarg.) logs from Alaska were sawn to compare recovery at a stud mill and at a dimension mill. Recovery at both mills varied by log diameters and by log scaling system. Lumber grade recovery was primarily in Stud grade at the stud mill and in Standard and Construction grade at the dimension mill. Lumber volume recovery is based on long log Scribner scale and on cubic scale. Lumber recovery was 2.23 times the Scribner volume at the stud mill and 2.05 times the Scribner volume at the dimension mill. The lumber recovery factor was 9.0 at the stud mill and 7.5 at the dimension mill.

Keywords

Lumber yield, lumber recovery, lumber volume, log scaling, western hem-lock, Tsuga heterophylla, pulpwood logs, dimension lumber, Alaska

Citation

Fahey, Thomas D. 1983. Product Recovery From Hemlock "Pulpwood" From Alaska. Res. Pap. PNW-RP-303. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 28 p