Seasoning and surfacing degrade in kiln-drying Douglas-fir in eastern Washington.

A.C. Knauss; E.H. Clarke

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Seasoning and surfacing degrade in kiln-drying Douglas-fir in eastern Washington.

Informally Refereed

Authors:

A.C. Knauss, E.H. Clarke

Year:

1961

Type:

Scientific Journal

Station:

Pacific Northwest Research Station

Source:

PNW Old Series Research Note No. 209, p. 1-10

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Abstract

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.

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