Systematic Resource Characterization Through Veneering and Nondestructive Testing

Authors

  • Brad Jianhe Wang
  • Chunping Dai

Keywords:

Amabilis fir, hemlock, nondestructive testing, resource characterization, veneer, wood properties, utilization

Abstract

In 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.

References

Alteyrac J, Zhang SY, Cloutier A, Ruel J-C (2005) Influence of stand density on ring width and wood density at different sampling heights in black spruce (Picea mariana [Mill.] B. S. P.). Wood Fiber Sci 37(1):83-94.nAPA (2000) Performance standard for APA EWS laminated veneer lumber. APA EWS PRL-501. 6 pp.nBCMFR (2007) Coastal Forest Action Plan, BC Government. Victoria, BC, Canada. 12 pp.nBeaulieu J, Zhang SY, Yu Q, Rainville A (2006) Comparison between genetic and environmental influences on lumber bending properties in young white spruce. Wood Fiber Sci 38(3):553-564.nCSA (2009) Canadian softwood plywood. CSA O151-09. Canadian Standards Association. 25 pp.nDai C, Fu F, Wang BJ (2001) Veneer and LVL properties—Second growth hemlock. Special Publication SP-41, Forintek Canada Corp. Section 5. 16 pp.nDickens JR, Bender DA, Bray DE (1996) A critical-angle ultrasonic technique for the inspection of wood parallel-to-grain. Wood Fiber Sci 28(3):380-388.nFibre-gen Ltd (2011) http://www.fibre-gen.com/'>http://www.fibre-gen.com/nFPInnovations (2011) SilviScan—Cost-effective measurement of industrially important wood properties. FPInnovations, Vancouver, BC, Canada. 1 p.nGerhards CC (1982) Longitudinal stress waves for lumber stress grading: Factors affecting applications: State of the art. Forest Prod J 32(2):20-25.nHuang SY, Wang BJ, Lu JX, Lei YC (2011) Review of overall research on knots. China Forest Products Industry 38(5):3-7.nJung J (1979) Stress-wave grading techniques on veneer sheets. Gen Tech Rep FPL-GTR-27. USDA For Serv Forest Prod Lab, Madison, WI. 13 pp.nKang H, Booker RE (2002) Variation of stress wave velocity with MC and temperature. Wood Sci Technol 36:41-54.nKnudson RM, Wang BJ, Zhang SY (2006) Properties of veneer and veneer-based products from genetically improved white spruce plantations. Wood Fiber Sci 38(1):17-27.nKoubaa A, Isabel N, Zhang SY, Beaulieu J, Bousquet J (2005) Transition from juvenile to mature wood in black spruce (Picea Mariana [Mill.] B. S. P.). Wood Fiber Sci 37(3):445-455.nKretschmann DE, Moody RC, Pellerin RF, Bendtsen BA, Cahill JM, McAlister RH, Sharp DW (1993) Effect of various proportions of juvenile wood on laminated veneer lumber. Res Pap FPL-RP-521. USDA For Serv Forest Prod Lab, Madison, WI. 31 pp.nLei YC, Zhang SY, Jiang Z (2005) Models for predicting lumber bending MOR and MOE based on tree and stand characteristics in black spruce. Wood Sci Technol 39:37-47.nLiu C, Zhang SY (2005) Equations for predicting tree height, total volume, and product recovery for black spruce (Picea mariana) plantations in northeastern Quebec. For Chron 81(6):808-814.nMetriguard (2011a) Metriguard model 239 stress wave timer. http://www.metriguard.com/'>http://www.metriguard.com/nMetriguard (2011b) Metriguard model 2850 DME veneer tester. http://www.metriguard.com/'>http://www.metriguard.com/nMiddleton GR, Munro BD (2001). Second-growth western hemlock product yields and attributes related to stand density. Special publication SP-41. Forintek Canada Corp. 128 pp.nNLGA (2003) Standard grading rules for Canadian lumber. New Westminster, BC, Canada. 273 pp.nRidoutt BG, Wealleans KR, Booker RE, Mcconchie DL, Ball RD (1999) Comparison of log segregation methods for structural lumber yield improvement. Forest Prod J 49(11/12):63-66.nRippy RC, Wagner FG, Gorman TM, Layton HD, Bodenheimer T (2000) Stress-wave analysis of Douglas-fir logs for veneer properties. Forest Prod J 50(4):49-52.nRoss RJ, Willits SW, Segen WV, Black T, Brashaw BK, Pellerin RF (1999) A stress wave based approach to NDE of logs for assessing potential veneer quality. Part 1. Small-diameter Ponderosa pine. Forest Prod J 49(11/12):60-62.nSAS Institute (2011) JMP 9 statistical discovery software. SAS Institute, Inc., Cary, NC.nThomas RE (2008) Predicting initial yellow-poplar log defect features using surfacing indicators. Wood Fiber Sci 40(1):14-22.nTong QJ, Tanguay F, Zhang SY (2011) Impact of commercial thinning on annual radial growth and wood density in plantation-grown black spruce. Wood Fiber Sci 43(3):311-325.nTong QJ, Zhang SY (2006) Modelling jack pine lumber value recovery in relation to tree characteristics using Optitek simulation. Forest Prod J 56(1):66-72.nWang BJ (2006) Characterizing distribution of green veneer moisture content. Forest Prod J 56(9):84-89.nWang BJ, Dai C (2006) Veneer grading strategies for LVL production. Pages 263-275 in Proc 2nd International Symposium on Veneer Processing and Products, Vancouver, BC, Canada.nWang BJ, Dai C (2008) Present utilization and outlook of BC hem-fir for composite products. Report for BC Coastal Forest Sector Development Program, FPInnovations, Vancouver, BC, Canada. 15 pp.nWang BJ, Dai C, Groves K (2011) Improved green veneer clipping and sorting for plywood and LVL manufacturing. Report-201002975, FPInnovations, Vancouver, BC. 23 pp.nWang BJ, Dai C, Middleton G, Munro D (2010a) Characterizing short rotation coastal hemlock and amabilis fir veneer properties: Preliminary results. Report for BC Coastal Forest Sector Hem-fir Initiative, FPInnovations, Vancouver, BC, Canada. 23 pp.nWang BJ, Dai C, Middleton G (2010b) Manufacturing and performance evaluation of LVL made from stress graded hem-fir veneer. Report for BC Coastal Forest Sector Hem-fir Initiative, FPInnovations, Vancouver, BC, Canada. 11 pp.nWang X, Ross RJ, Green DW, Brashaw B, Englund K, Wolcott M (2004) Stress wave sorting of red maple logs for structural quality. Wood Sci Technol 37:531-537.nWilcox WW (1988) Detection of early stages of wood decay with ultrasonic pulse velocity. Forest Prod J 38(5):68-73.nYeh TF, Braun JL, Goldfarb B, Chang HM, Kadla JF (2006) Morphological and chemical variations between juvenile wood, mature wood, and compression wood of loblolly pine (Pinus taeda L.). Holzforschung 60:1-8.nZhang SY, Chauret G, Ren HQ, Desjardins R (2002) Impact of initial spacing on plantation black spruce lumber grade yield, bending properties, and MSR yield. Wood Fiber Sci 34(3):460-475.nZhang SY, Lei YC, Jiang ZH (2006) Modelling the relationship of tree-level product value with tree characteristics in black spruce. For Chron 82(5):690-699.n

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Published

2013-04-15

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Research Contributions