The study objective was to determine if differences in the quality of Douglas-fir in the B.C. Interior could be assessed on the basis of characteristics visible in standing trees so as to provide site-specific measures of stand value. Six sawmill studies, with a final sample of 1,862 trees are described. Sample trees were selected and their quality characteristics recorded. These trees were felled and their logs processed into finished lumber from which individual tree values were calculated. An index shows the effect of tree quality and tree size on average lumber value per unit volume. A description of each mill study allows comparison of average sound lumber recovery factors.
This volume is a useful reference tool which covers conversion factors for the Western industry. Topics include log volume, wood density, bark, sawmilling, veneer and plywood, boards, pulp, shingles and shakes and energy. In many cases the factors presented are average values or rough estimates, but often this level of accuracy is sufficient for mill calculation purposes.