SCOTT MILLER, PHD CANDIDATELAKEHEAD UNIVERSITY WOOD SCIENCE TESTING FACILITY
Goal The broad goal: is to identify new market opportunities for the region’s forest sector using wood characteristics mapping. The purpose: is to assess whether wood characteristics mapping provides an opportunity to optimize the value chain. There is no change in wood properties with changes in radial, axial, and geographic positions (site).
The wood characteristics mapping of eastern larch involvedmapping the radial and axial changes in physical andmechanical proprieties of twelve eastern larch trees from foursites grown within the Thunder Bay District.
H0 : No change in relative density with changes in radial, axial, andgeographic positions (site). Change in radial position: H0: rejected. Change in axial position: H0: rejected. Change in geographic position (site): H0: rejected.
H0 : No change in MOE (stiffness) with changes in radial, axial, andgeographic positions (site). Change in radial position: H0: rejected. Change in axial position: H0: rejected. Change in geographic position (site): H0: rejected.
A set of wood characteristics = design criteria (sector specific)National Lumber Grades Authority (NLGA) Machine Stress Rated for LumberMSR grades based on a series of mechanical properties at a given relativedensity and visual defects especially knots..Australian standard grading for seasonal structural timber Minimum values for Strength Groups Modulus of Maximum Strength Modulus of Elasticity Crushing Group Rupture (Mpa) (Mpa) Strength (Mpa) SD1 10500 150 80 SD2 10500 130 70 SD3 10500 110 61 SD4 10500 94 54 SD5 10500 78 47 SD6 10500 65 41 SD7 9100 55 36 SD8 7900 45 30
H0 : No change in Strength Class with changes in radial, longitudinal, andgeographic positions (site). Change in radial position: H0: accepted. Change in axial position: H0: accepted. Change in geographic position (site): H0: rejected. Wood Properties Strength Classes Subset 1 Subset 1 Slope Subset 2 Slope Subset 2 Subset 3 Moisture Moisture
Stand factors – site conditions, growth response, age.
• In all cases of statistical analysis, variance between sites was significant.• Axial and radial variance were significant for all the selected wood properties tested.• Wood characteristics mapping of eastern larch was found to be possible.• Using eastern larch wood characteristic map in optimization software increased the overall value of eastern larch by as much as 31%.
THIS RESEARCH WAS COMPLETED IN PARTNERSHIP WITH LAKEHEAD UNIVERSITY WOOD SCIENCETESTING FACILITY, FP INNOVATIONS AND ONTARIO MINISTRY OF NATURAL RESOURCES. Addidtional support was received from AbitibiBowater, FedNor, and Northern Ontario Heritage Fund Corporation.WE WOULD ESPECIALLY LIKE TO THANK LAKEHEAD UNIVERSITY, FACULTY OF NATURAL RESOURCES MANAGEMENT DR. MATT LIETCH DR. CHANDER SHAHI DR. Dr. Reino Pulkki PROOF READER CINDY DAWN RETGUM