MASS TIMBER: INVESTIGATIONS

The document highlights the environmental benefits of mass timber over steel and concrete, specifically noting significant reductions in CO2 emissions per square foot of floor assembly. It showcases various projects in Washington and Oregon, including residential, office, and school buildings, while calling for new building codes and national action to support the adoption of mass timber and sustainable forest practices like restorative thinning.

• Mass timber construction results in significantly lower CO2 emissions per square foot of floor assembly compared to steel and concrete composite constructions, with timber producing 7,467 tons of CO2 emissions while steel and concrete produce 13,179 and 14,444 tons respectively.
• The adoption of mass timber is linked to sustainable forest management practices, including the use of small-diameter timber and restorative thinning.
• The document advocates for systemic change and the implementation of new building codes, specifically mentioning protection types 4A and 4C, to facilitate the use of mass timber.
• Recent mass timber projects in the Pacific Northwest include the CLTHouse in Seattle, a CLT Church in Bellevue, CLT Schools in Wapato, an eight-story residential building in Portland, and a five-story 155,000 SF office building in Hillsboro.

APA

JONES, S. (2018). MASS TIMBER: INVESTIGATIONS. Environmental and Energy Study Institute. https://www.eesi.org/files/Susan_Jones_102318.pdf

Chicago

JONES, SUSAN. MASS TIMBER: INVESTIGATIONS. Environmental and Energy Study Institute, 2018. https://www.eesi.org/files/Susan_Jones_102318.pdf.

Wikipedia

{{cite report |last1=JONES |first1=SUSAN |title=MASS TIMBER: INVESTIGATIONS |publisher=Environmental and Energy Study Institute |date=23 October 2018 |url=https://www.eesi.org/files/Susan_Jones_102318.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{jones2018mass, author = {JONES, SUSAN}, title = {{MASS TIMBER: INVESTIGATIONS}}, institution = {Environmental and Energy Study Institute}, year = {2018}, month = oct, url = {https://www.eesi.org/files/Susan_Jones_102318.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }