MASSTIMBERLATERALFRAMINGSYSTEMSDESIGNANDDETAILINGOPTIONS

IlanaDanzigP.Eng,PE(WA)M.Eng

Disclaimer:ThispresentationwasdevelopedbyathirdpartyandisnotfundedbyWoodWorks ortheSoftwoodLumberBoard

“TheWoodProductsCouncil” isa

RegisteredProviderwithTheAmerican

InstituteofArchitectsContinuing

EducationSystems(AIA/CES),Provider

#G516.

Credit(s)earnedoncompletionofthis

coursewillbereportedtoAIACES for

AIAmembers.CertificatesofCompletion

forbothAIAmembersandnon-AIA

membersareavailableuponrequest.

ThiscourseisregisteredwithAIACES

forcontinuingprofessionaleducation.

Assuch,itdoesnotincludecontent

thatmaybedeemedorconstruedto

beanapprovalorendorsementbythe

AIAofanymaterialofconstructionor

anymethodormannerofhandling,

using,distributing,ordealinginany

materialorproduct.

______________________________

Questionsrelatedtospecificmaterials,methods,

andserviceswillbeaddressedattheconclusionof

thispresentation.

Masstimberbuildingsarebecomingmorecommonin

theUS,howeverthemasstimbercomponentsinthese

buildingsareoftenlimitedtogravityloadresistance

whilelateralloadsareresistedbyotherstructural

materials.Thispresentationwillhighlightoptionsfor

masstimberlateralframingsystemssubjecttoeither

seismicorwindloadssuchasheavytimberbraced

frames,cross-laminatedtimbershearwalls,andmass

timberpaneldiaphragms.Designprocesses,code

applications,andexampleprojectswillbeincluded.

Detailingbestpracticesfortheselateralsystemswillalso

bediscussed,withanemphasisonresilience,

constructabilityandcostefficiency.

COURSEDESCRIPTION

1. ReviewtheuseofmasstimberframinginmodernUS

projects.

2. Highlightoptionsforincorporatingmasstimber

componentsinlateralload-resistingsystems.

3. Discussdesignprocessesandcurrenttestingand

researchrelatedtocross-laminatedtimbershear

walls,includingpost-tensionedandrockingwall

options.

4. Inthecontextofcostefficiencyandconstruction

speed,exploredetailingbestpracticesformasstimber

lateralframingsystems.

LEARNINGOBJECTIVES

WHYMASSTIMBER?

WHATISMASSTIMBER?

FUNDAMENTALS

WOODE1 gradeCLT

CONCRETE4000psi,0.4%reinf

STIFFNESS(E)

1.7x106 PSI 3.6x106 PSI

STRENGTH(FV)

135PSI 360 PSI

SYSTEMS

MASSTIMBERSHEARWALLS• “CONVENTIONAL”

• HIGHERDUCTILITY

• ROCKING

“CONVENTIONAL”

R=2.0

LIGHTGUAGEMETALCONNECTORS

HIGHERDUCTILITY

POST-

TENSIONING

YIELDING

ENERGY

DISSIPATORS

DAMPERS/

YIELDING

DISSIPATORS

ROCKING

MASSTIMBERMOMENTFRAMES

DuctileMomentFrames

MASSTIMBERBRACES

MASSTIMBERDIAPHRAGMS• PLYWOODOVERLAY

• PLYWOODSPLINE

• HALF-LAPWITHSCREWS

• BUTTJOINTWITHSCREWS

CODES

IBC104.11

ASCE7-101.3.1.3PERFORMANCE-BASEDPROCEDURES

CASESTUDIES

DesignBuilding

LeersWeinzapfel Associates

UniversityofMassachusetts,Amherst

AM&M:140PAGEREPORT:

• STRUCTURALDESIGN• REFERENCETOCANADIANCODES• REFRENCESTOCOMPLETEDPROJECTS

• RESEARCHPUBLICATIONSANDTESTRESULTS• EUROPEANTECHNICALAPPROVALS

OSUForestScienceComplexMichaelGreenArchitects

OregonStateUniversity,Corvallis

OTHERELEMENTS

SPECIALDIAPHRAGMCONNECTORS LVLROOFDIAPHRAGM

SPECIALBEAMHANGERS

CONCRETEFLOORDIAPHRAGM

AM&M:EVERYTHINGSUBMITTEDFORIDBPLUS

• ADDITIONALRESESARCH•MULTIPLEMEETINGSANDPHONECALLSWITHAHJ

• NONLINEARTIMEHISTORYANALYSIS(WITHPTL)

• PEERREVIEWWITH2SEPARATEREVIEWERS

HIGHERMODE

TAKEAWAYSüMOREAVAILABLETHANWHATISINTHECODE

üCOLLABORATIVEAPPROACHWITHAHJ

üNOTALL-OR-NOTHING

üTHISISONLYTHEBEGINNING

üNEEDTOBEABLETOANSWER“WHYMASSTIMBER”

ü NDS2015

ü SOMEICCAPPROVALS

ü USCLTGUIDE

üWHITEPAPERSFROMSUPPLIERS

üWOODWORKS

RESOURCES

THANK YOU

ThisconcludesTheAmericanInstitute

ofArchitectsContinuingEducation

SystemsCourse

QUESTIONS?

IlanaDanzig

EquilibriumConsulting

idanzig@eqcanada.com