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UMass Design Building: Timber TalkDr. Peggi Clouston, Ph.D., P. Eng.Associate Professor

Building and Construction Technology Program, UMassclouston@umass.edu

UMass Design Building, Amherst MA

Image credit : Leers Weinzapfel Associates

UMass Design Building

Thursday 1/21/16

First structure of its kind in the US! 86,000 sq. ft. institutional building Glulam. CLT, wood-concrete composites,

hybrid trusses Go UMass!

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What is timber engineering? “high-tech”

Prince George Airport, British ColumbiaPhoto credit: McFarlane Green Biggar (MBG) Architects

“bold and beautiful”

“revolutionary”

“eco-friendly”

“new”

Tallest mass timber building in North America at 27m high

Tall Timber is ‘in’

Wood Innovation and Design Center (WIDC) British Columbia, CAPhoto credit: McFarlane Green Biggar (MBG) Architects

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World wide competition

Forte Building Melbourne, Australia

Tallest in the world at 32m high Soon to open at 49m high

Treet BuildingBergen, Norway

TIMBER TOWER PROJECT by SOM

42 storiesproposed!

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Primary drivers:

Sustainability&Innovation

“Wood can help to earn points in categories typically found in green building rating systems— including certified wood, recycled/reused/salvaged materials, local sourcing of materials, waste minimization,

indoor air quality, advanced building techniques and skills and life cycle impacts” …

Quote source: ReTHINK Wood

WRNS Studio, San Francisco

Green Building Awards

Office Building for GlaxoSmithKline Inc., QuebecNordic CLT. Photo credit © Stéphane Groleau

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Sustainability and wood

• Wood is the only major renewable building material

• Wood is recyclable and triggered biodegradable

• Wood products store carbon

• Life Cycle Assessment (LCA) studies show wood to have a comparatively small environmental footprint

• Wood creates a healthy indoor environment

Carbon sequestration and storage

• Wood and wood products store carbon until they burn or biodegrade

Photo credit: Neuweiser (creative commons)

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Image courtesy of Joseph Mayo of Mahlum | Architects Inc.

Wood products capture carbon

Life Cycle Assessment (LCA) Study

Image source: ReTHINK WOOD® - Building Green with Wood (Module 2)

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Image source: Prof. DDI Michael Flach

Healthy Indoor Environment

• Humidity control

• Stress reducing effects:

http://woodworks.org/wp-content/uploads/Wood-Human-Health11.pdf

• Advanced adhesives w/ minimal to no off-gasing

UMass Design Building

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Primary drivers:

Sustainability&Innovation

High-tech wood

Glulam

Cross Laminated Timber

Parallel Strand Lumber (a type of SCL)Wood Concrete Composites

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Art Gallery of Ontario, TorontoPhoto credit: Thomas Mayer

• Used for over 100 years• Covered in IBC• Manufacturing and design info. by AITC • Minimum X-sections ~6”x8” (columns), ~5”x10” (beams)• Spans up to 60’

Glulam

L1 - Dense

L2

L2

L3

compressionside

tensionside

The secret behind Glulam strength

• Defects are dispersed• Layup is engineered

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Design Building Glulam Column Installation 1/26/16

Earth Sciences Building at the University of British Columbia, Vancouver. Source: Structurlam Products, LP

Cross-laminated timber (CLT)

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• 3/5/7 layers• ≥ 4in thick as floors and ≥ 3in as roofs• panels up to 12ft by 60ft• Adhesives in accordance with

ANSI/APA PRG 320

Image source: KLH LTD

• Built in 10 weeks by five workers!

Forte, Melbourne -10 story CLT structure

Image source: KLH LTD

Video:https://www.youtube.com/watch?v=cqXygHyU5ws

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Bertsche connector

HBV system

SFS Intec VB Screws

Photo credit : SFS Intec

Image: Bertsche System, GmbH

Wood-concrete composites

Design Building floors

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UMass WCC research

Failure line

Steel failure

Benefit of composite action

Publications

❖ Clouston P, Schreyer A. 2012.“Experimental Evaluation of ConnectorSystems for Wood Concrete CompositeFloor systems in Mill BuildingRenovations.” International Journal of theConstructed Environment, Volume 2,Issue 1, pp.131-144.

❖ Clouston P, Schreyer A. 2008. “Designand Use of Wood-Concrete Composites”.ASCE Practice Periodical on StructuralDesign and Construction, 13(4), pp. 167-175

❖ Clouston P, Bathon L, Schreyer A. 2005.“Shear and Bending Performance of aNovel Wood-Concrete CompositeSystem”. ASCE Journal of StructuralEngineering. 131(9), pp.1404-1412

❖ Clouston P, Civjan S, Bathon L. 2004.“Experimental Behavior of a ContinuousMetal Connector for a Wood-ConcreteComposite System”. Forest ProductsJournal. 54(6) pp. 76-84

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Passive Fire Protection

Durability

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View from North Pleasant Street

Image credit : Leers Weinzapfel Associates

View of atrium and exhibit space

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Image credit : Leers Weinzapfel Associates

The south wing in a day…