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      LIFE CYCLE ENERGY AND ENVIRONMENTAL IMPACTS OF CROSS LAMINATED TIMBER MADE WITH COASTAL DOUGLAS-FIR

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          ABSTRACT

          In this study, a cradle-to-gate life-cycle assessment (LCA) of Oregon-made cross-laminated timber (CLT) was conducted as per the ISO guidelines. Primary data pertaining to CLT manufacturing was collected from a production facility in Oregon and modeled with existing LCA data of Pacific Northwest softwood lumber production and harvesting operations. Primary energy is reported and encompasses all processes within the system boundary. Carbon emissions are reported and include fossil-based emissions from transportation and all production processes and carbon storage in CLT. LCA results are presented for five impact categories, primary energy consumption, and net carbon impact of CLT. Results show the environmental advantage of CLT due to storing of large amounts of biogenic carbon in a building structure for a lifetime. The amount of carbon stored in CLT offsets the emissions released from all production processes; this indicates that CLT is a net negative carbon emitter, as more carbon is stored in the product than is emitted to produce the product. This study shows the importance of using the LCA methodology for showing the net amount and type of energy used for production and the potential climatic impacts of using wood products. This LCA study makes no comparative assertions.

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          Author and article information

          Contributors
          Role: Associate Professor
          Role: Assistant Professor
          Journal
          jgrb
          Journal of Green Building
          College Publishing
          1552-6100
          1943-4618
          1943-4618
          Fall 2019
          : 14
          : 4
          : 17-33
          Author notes

          1. WoodLife Environmental Consultants, Corvallis, OR. maureen.puettmann@ 123456woodlifeconsulting.com

          2. Dept. of Wood Science and Engineering, Oregon State University, Corvallis, OR. arijit.sinha@ 123456oregonstate.edu

          3. Center for International Trade in Forest Products, School of Environmental and Forest Sciences, University of Washington, Seattle, WA. indro@ 123456uw.edu

          Article
          jgb.14.4.17
          10.3992/1943-4618.14.4.17
          285affa8-1c1e-40ae-b346-648ce4d52484
          History
          Page count
          Pages: 17
          Categories
          RESEARCH ARTICLES

          Urban design & Planning,Civil engineering,Environmental management, Policy & Planning,Architecture,Environmental engineering
          cradle-to-gate,CLT,energy,life-cycle assessment,carbon impacts

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