Steve Marshall, Mass Timber Strategies Yale School of the ...
Transcript of Steve Marshall, Mass Timber Strategies Yale School of the ...
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Why does Mass Timber matter?
Yale School of the Environment, September 9, 2021
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Steve Marshall, Mass Timber Strategies
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“The best time to plant a tree was 20 years ago. The second best time is now.” -Chinese
proverb
MassTimberStrategies.comMassTimberStrategy.com
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The big choice:
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Renewable Buildings vs.
Fossil Buildings.
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TimberDecades
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LimestoneMillions of years
Replenishment rates
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Close to 40% of carbon emissions
are due to buildings.
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Floor area in buildings is
expected to rise by 75% between
2020 and 2050.MassTimberStrategy.com
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Focus onoperational and
embodied carbon
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Mass Timber can help us zero out
embodied carbon.
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New tools to evaluate the
embodied carbon of buildings.
Such as the Athena Impact Estimator, 1-Click LCA, Tally,
EC3, WoodWorks Carbon Calculator
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It is a solar-powered construction
material.MassTimberStrategy.com
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So what is Mass Timber?
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Mass Timber is made by fastening other
wood products together.
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Cross Laminated
Timber
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CLTMurray Grove
9 storiesLondon
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GLT
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NLTT3 BuildingMinneapolis
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DLTPublic Library
Washington, D.C.
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MPP
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ETCFor example,
interlocking glueless CLT
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CLT originated in the early 1990s in
Austria and Germany.
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1923 U.S. Patent
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As recently as 2013, there was almost no use of
CLT in the United States.
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2010 North Carolina belltower
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Mass Timber projects in design and constructed in the US (June 2021)
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545 projects built or started so far
624 in design
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Production is expanding with more than a dozen Mass Timber production
facilities in North America
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This rapid expansion in Mass Timber is largely
due to its sustainability.
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MassTimberStrategy.com
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Embodied carbon is being recognized.
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● Where are we at with Mass Timber?
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2021 IBC covers Mass Timber up to 18 stories
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● Ascent in Milwaukee
But you don’t have to stop at 18 stories.Ascent, which is under construction, will be 25 stories.
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Doing Mass Timberbuildings of 10 stories
just got easier in the U.S.
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● Successes so far● Carbon and sustainability● Building code changes● More product available● More types of products available● More experience● More tools● Federal, state, and local support
Mass Timber momentum is increasing due to:
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What’s next?
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What’s next: Infills and overbuilds
Taking Mass Timber to where people live, work, and play
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Taking advantage of an existing foundation
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We often think about this as a construction advantage but it is also a community benefit
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● 30% faster● 50% less crew● 60% less truck traffic● Quieter● Can use existing structures
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We can get construction and community benefits from:
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Mass Timber connects Sustainable buildings and sustainable forests.
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Biophilic Design
Initial data indicates health and wellbeing
benefits from building with wood.
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Expanding use of CLT in school
buildings
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We will see more:● Tall buildings● Modular construction● Pre-designed buildings● Hybrid technologies● Multiple building projects● Timber districts● Affordable housing projects
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We will continue to see rural and urban communities come together
Sustainable forests and sustainable communities supported by:● Forest Practice Acts● Forest Certification● Life Cycle Analysis● Environmental Product Declarations
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Introducing the Mass Timber Marketplace:
www.masstimberstrategy.com/key-resources
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Mass Timber Technical Guides
www.masstimberstrategy.com/key-resources
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American Wood Council
summary
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We canbuild
Renewable Buildingsnow
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