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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