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Salvaged lumber for Structural Mass Timber Panels: Manufacturing and Testing

R. Arbelaez, L. Schimleck, A. Sinha

Abstract


Portland, OR, was the first US city to implement a deconstruction ordinance in 2016. Although salvaged lumber can have a high demand, the market for small-sized lumber from deconstructed dwellings is near saturation. New applications for this material are required for market development, industry diversification, and increasing deconstruction practices. Mass timber products such as cross-laminated timber (CLT) could be a new market for this material, but presently there is minimal information qualifying the performance of mass timber panels made with salvaged lumber. Three, full-sized 3-ply experimental layups, with varying amounts of salvaged/recycled wood content, were manufactured and tested to characterize panel properties. Manufacturing processes and testing methods followed ANSI/APA PRG 320-2018; Standard for Performance Rated Cross-Laminated Timber. Each panel layup had three replicates for nine panels in total. Panels measured 1.1 m by 2.3 m by 3 plys, and test results were used to calculate the effective flatwise bending moment resistance ((FbS)eff), effective flatwise bending stiffness ((EI)eff) effective shear stiffness in flatwise bending ((GA)eff), flatwise shear resistance (Vs), percent wood failure (WF%), and percent delamination (Delamination %). Results were compared with E3 grade 3-ply CLT panels made in the United States and indicated that salvaged lumber could be used as feedstock for mass timber panels in core layers or all layers. All panel layups passed benchmarks for (FbS)eff and (EI)eff  benchmarks with values greater than PRG320. Panels having salvaged lumber in core layer also met Vs benchmarks. Furthermore, all panels passed examination for WF% but struggled to meet delamination requirements. Possibilities exist for better performance if panels were made in a commercial setting. This research shows salvaged lumber has promise for manufacturing structural CLT, but more research and a larger samples size is needed to verify findings.


Keywords


Deconstruction; Salvaged lumber; Cross-laminated timber; Structural performance; Recycling; Engineered wood products; Wood composites

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References


AITC (2007) Test methods for structural glued laminated timber. American Institute of Timber Construction, Portland, OR.

ANSI/AF&PA (2005) National design specification for wood construction (NDS). American National Standards Institute/American Forest and Paper Association NDS. American Wood Council, Washington, D.C.

ANSI/APA (2018) Standard for performance-rated cross laminated timber. ANSI/APA-PRG320. American National Standards Institute, Tacoma, WA.

Arbelaez R, Schimleck L, Dahlen J, Wood S (2019) Evaluation of lumber from deconstructed Portland residential buildings. Wood Fiber Sci 51(4):1-9.

Bowyer J (2016) The irresponsible pursuit of paradise. Levins Publishing, Minneapolis, MN.

Diyamandoglu V, Fortuna L (2015) Deconstruction of wood framed houses: Material recovery and environmental impact. Resour Conserv Recycl 100:21-30.

Falk R, Cramer S, Evans J (2012) Framing lumber from building removal: How do we best utilize this untapped structural resource? Forest Prod J 62:492-499.

Falk R, DeVisser D, Cook S, Stansbury D (1999) Effect of damage on the grade yield of recycled lumber. Forest Prod J 49:71-79.

Falk R, Maul D, Cramer S, Evans J, Herian V (2008) Engineering properties of Douglas-fir lumber reclaimed from deconstructed buildings. Research Paper FPL-RP-650. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI. 47 pp.

Falk R, McKeever D (2012) Generation and recovery of solid wood waste in the U.S. Biocycle 53:30-32.

Green D, Evans J (1988) Mechanical properties of visually graded dimension lumber, Vol. 4. Southern pine. Pub. PB-88-159-413. National Technical Information Service, Springfield, VA.

Howe J, Bratkovich S, Bowyer J, Frank M, Fernholz K (2013) The current state of wood reuse and recycling in North America and recommendations for improvements, wood reuse and recycling in North America. Dovetail Partners, Minneapolis, MN.

Karacabeyli E, Douglas B (2013) CLT handbook, U.S. edition. FP Innovations and Binational Softwood Lumber Council, Point-Claire, Quebec.

Kramer A, Barbosa A, Sinha A (2013) Viability of hybrid poplar in ANSI approved cross-laminated timber applications. J Mater Civil Eng 26(7):06014009.

Lawrence C (2017) Utilization of low-value lumber from small-diameter timber harvested in Pacific northwest forest restoration programs in hybrid cross laminated timber (CLT) core layers: Technical feasibility. MS thesis, Oregon State University, Corvallis, OR. 112 pp.

Larkin B (2017) Effective bonding parameters for hybrid cross-laminated timber (CLT). MS thesis, Oregon State University, Corvallis, OR. 120 pp.

Rose C, Bergsagel D, Dufresne T, Unubreme E, Lyu T, Duffour P, Stegemann J (2018) Cross-laminated secondary timber: Experimental testing and modelling the effect of defects and reduced feedstock properties. Sustainability 10:4118.

Ross R (2010) Wood handbook: Wood as an engineering material. General Technical Report FPL-GTR-190. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI. 509 pp.

Wood S (2016) City of Portland ordinance no.187876, Portland, OR. https://www.portlandoregon.gov/bps/article/586234 (6 July 2016).

Wood S (2015) City of Portland resolution no. 37190, Portland, OR. https://www.portlandoregon.gov/bps/article/569831 (17 February 2016).

Wood S (2018) Deconstruction program (May 2018), U.S. Environmental Protection Agency. https://www.epa.gov/sites/production/files/2018-05/documents/epa_webinar_

april_2018.pdf (20 August 2019).


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