Systematic Resource Characterization Through Veneering and Nondestructive Testing
Keywords:Amabilis fir, hemlock, nondestructive testing, resource characterization, veneer, wood properties, utilization
AbstractIn this study, a systematic approach was established for resource characterization via veneering and nondestructive testing. A recent study with short-rotation western hemlock (Tsuga heterophylla [Raf.] Sarg) and amabilis fir (Abies amabilis [Dougl.] Forbes) in British Columbia, Canada, was showcased to demonstrate the effectiveness of this approach. By proper tree sampling, veneer processing, and nondestructive testing on a sheet basis, the proposed approach helps rapidly address several critical issues on resource characterization and utilization, such as 1) the impact of stand characteristics on wood properties including density and modulus of elasticity (MOE) or attributes such as wood moisture content and color; 2) the within-tree and between-tree variations of these wood properties or attributes; 3) the spatial distribution of log defects, such as knots and decay; 4) the effect of tree growth rate, stem position, juvenile and mature wood, sapwood, and heartwood on key veneer properties such as thickness, surface roughness, density and MOE; and 5) veneer yield, visual grade, stress grade, and high-value product potentials. To maximize the value return from the available resource, this approach involves an assessment for product options with predicted grade outturns.
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