Evaluation of Lumber from Deconstructed Portland Residential Buildings
Open accessAbstract
Portland, Oregon was the first U.S. city to implement a deconstruction ordinance in 2016. Although salvaged lumber from deconstructed dwellings can have high demand, the market for small-sized lumber is near saturation. New applications for this material are required for market development, industry diversification and the possible expansion of the deconstruction ordinance. Its use in mass timber is an option, but presently no wood property information exists for lumber from deconstructed dwellings inhibiting its use for structural purposes. Density and dynamic MOE (E) of 265, 38 mm x 89 mm (2 x 4) pieces of salvaged Douglas fir (Pseudotsuga menziesii) lumber were determined using a Metriguard Model 340 E-Computer. Additional data collected included sample dimensions, weight, and visual appearance. Over 50% of samples had a calculated stiffness comparable to the highest structural design grade for Coastal Douglas fir lumber. The presence of knots and damage, present in 66% and 59% of boards respectively, would likely downgrade boards, despite acceptable stiffness. Results show that 96% of samples were sufficiently stiff to meet minimum requirements for the manufacture of E3 grade cross laminated timber (CLT) panels and considering defects, this material is suitable for manufacturing CLT. Provision of wood property information for salvaged lumber is critical for market expansion and this work represents the first characterization of lumber from deconstructed Portland, OR dwellings.
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A large amount of material waste is generated by the demolition sector, including timber that can be reused or recycled for structural purposes.
“A large amount of material waste is generated by the demolition sector, including timber that can be reused or recycled for structural purposes [1 -4].”
From Grading of recovered Norway spruce (Picea abies) timber for structural purposes (2023) · cites this paper as [2]
The Abstract reports that salvaged lumber from deconstructed Portland dwellings is suitable for manufacturing structural cross-laminated timber. It does not establish that the demolition sector generates a large amount of material waste; searches for demolition waste quantities found no supporting passage in our copy. (LLM, conf=0.83)
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- Authors
- Arbelaez, R., Schimleck, L., Dahllen, J., & Wood, S.
- Affiliations
- Oregon State University (US)
- City of Portland (US)
- ORCID
- Schimleck, L.
- Venue
- Wood and Fiber Science
- Published
- 2019-10-31
- Volume
- 51
- Issue
- 4
- Pages
- 432-440
- ISSN
- 0735-6161 (ISSN-L)
- OpenAlex
- W2982217269
- Cited by
- 10
- References
- 9
- Citations by year
- 2026: 4 · 2024: 3 · 2023: 1 · 2022: 1 · 2020: 1
- FWCI
- 0.34
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- Wood and Fiber Science (publishedVersion)
- Wood and Fiber Science (Society of Wood Science and Technology) (submittedVersion)
- Topics
- Physical Sciences › Engineering › Building and Construction › Wood Treatment and Properties
- Life Sciences › Agricultural and Biological Sciences › Forestry › Agricultural and Food Sciences
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Bamboo properties and applications
- Keywords
- deconstruction, Pseudotsuga menziesii, cross-laminated timber, dynamic modulus of elasticity, wood density, mass timber, Portland, Oregon
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