Publication Information
Title: Seasoning and surfacing degrade in kiln-drying Douglas-fir in eastern Washington.
Author: Knauss, A.C.; Clarke, E.H.
Date: 1961
Source: PNW Old Series Research Note No. 209, p. 1-10
Station ID: OSN-PNW-209
Description: This report presents the results of a study to determine the degrade (loss in volume and grade) of Douglas-fir lumber when kiln-dried and surfaced in accordance with commercial practice in eastern Washington. The study measured (1) loss in volume due to culling and trimming surfaced dry lumber because of sawing, seasoning, and surfacing defects; (2) reduction in grade due to seasoning and surfacing defects; and (3) reduction in grade due to incomplete manufacture or the development of manufacturing defects. Degrade is expressed
as a percentage of the rough green lumber volume and also as a loss in value per thousand board feet of lumber.
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Citation
Knauss, A.C.; Clarke, E.H. 1961. Seasoning and surfacing degrade in kiln-drying Douglas-fir in eastern Washington.. PNW Old Series Research Note No. 209, p. 1-10
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