SEISMIC CEILING SUSPENSION - Suppliers -...

SEISMIC CEILING SUSPENSION

Better.

Faster.

Easier.

Reliable.

Efficient.

Compliant.

Fast. Easy. Customer Focused.®

p2 I 800.323.7164 I chicagometallic.com

Seismic Codes: Development and Adoption

Purpose of Installation Requirements for Suspended Ceilings• Suspensionsystemsstrongenoughtoresistlateral forceimposeduponitwithoutfailing.

• Preventborderpanelsfromfallingfromtheceiling plane.

Federal Emergency Management Agency (FEMA)Seismic performance during recent large Californiaearthquakes prompted FEMA to address several concernsincluding suspended ceiling performance during a seismicevent.Researchand testsdemonstrated that current industryseismic standards (UBC Standard 25-2) were not adequate.FEMA determined that the key to good seismic performancewassupportof individualpanelsatwallsandexpansionjointsandinteractionwithsprinklersystems.Source:FEMA368NEHRPRecommendedProvisionsforSeismicRegulationsforNewBuildingsandOtherStructures

The Code Official is the Only Authority to Enforce Code ComplianceThebuildingcodewasestablishedtosetminimumrequirementsforlifesafetyandpreservationofproperty.Itisimportanttoknowthatwhilethebuildingcodeestablishestherequirements, it isthecodeofficialthathasthepowertoenforceitsprovisions.

The code official also has the latitude to allow materials andmethodsofconstructionthatarenotaddressedinthecode.Inthiscase,anofficialcanperformtheirownanalysisofevidencepresentedorcanrelyonindependent,qualifiedsourcessuchasICC-EStodotheanalysisandprovidetheirfindings.

Theresultingreportisspecific,technicalevidenceonwhichthecodeofficial canbaseapproval of aparticulardesignwithoutdelayingconstruction.

New Seismic CategoriesAccordingtotheInternationalBuildingCode,aSeismicDesignCategory must be established for each construction projectbasedon:

1. Anticipatedgroundmotion

2. Typeofsoilinaspecificgeographicarea

3. Occupancycategory

All50statesandtheVirginIslandsusetheInternationalBuildingCode(IBC)atalocalorstatewidelevel.

EarthquakesAre Coming!

• California — 62% probability of at least one magnitude 6.7 or greater quake in the San Francisco Bay region before 2032.

• East Coast & Midwest — 90% probability of a magnitude 6 to 7 event occuring within the next 50 years.

chicagometallic.com I 800.323.7164 I p3

Industry Standard Construction

ASCE 7-05 Section 13.5.6.2.1 Seismic Design Category CReference CISCA Recommendations for Seismic Zones 0 - 2

• Theceilingmustbeafree-floatingsystem,notattachedatanywalls.

• MainandCrossTeesneedaminimumof3/8)clearancefromthewalls.

• AllperimetergridcomponentsmustbetiedtogethertopreventspreadingusingSpacerBars,orothermeans.

• MustuseSafetyWiresonlightfixtures.

• PerimeterSupportWiresrequiredifWallAnglesupportledgeislessthan7/8).

• IntermediateDutysystem,60lb.minimumconnectionstrength.UseofhookCross Teeconnectionisacceptable.

• RefertoIBC2006,ASCE7-05andCISCASeismicZones0&2forcompletedetails.

ASCE 7-05 Section 13.5.6.2.2 Seismic Design Categories D thru FReference CISCA Recommendations for Seismic Zones 3 & 4

• Ceilingareaslessthan144ft2areexemptofstandardconstructionrequirements.

• HeavyDutysuspensionsystemmustbeused.

• Allsystemconnectionsneedtowithstandaminimumconnectionstrengthof180lbs.

• AWallAnglewitha2)ledgesupportmustbeusedattheperimeter.

• Ceilingmustbeattachedontwoadjacentwalls.

• Theopposingwallsmustbeunattached,witha3/4)clearancefromthewallfortheMainorCrossTees.

• SpacerBars,orothermeans,mustbeusedtotieperimetercomponentstogetheronunattachedwallstopreventspreading.

• PerimeterWiresmustbeusedwithin8)fromthewallonallfourwalls.

• SafetyWiresmustbeattachedtothelightfixtures.

• LightFixturesmustbepositivelyattachedtothegridsystem.

• Ceilingpenetrations,likesprinklers,mustprovideclearanceformovement.

• Ceilingareaslargerthan1,000ft2requirehorizontalrestraintevery144ft2consistingoffourdiagonalSplayWiresorrigidbracesincombinationwithaCompressionPost.

• Ceilingareaslargerthan2,500ft2requireaSeismicSeparationJoint.

• CeilingssubjecttospecialinspectionperASCE7-05Section13.5.6.2.2(h).

• RefertoIBC2006,ASCE7-05andCISCASeismicZones3&4forcompletedetails.


Becauseceilingpanelperformanceandnon-teebarsuspensionsystemsarenotwelldefinedintheIBCrequirements,CMCisworkingwithanindependent,internationallyrenownedstructuralengineeringfirmtotestbothstandardandnon-standardceilingsystemsforseismicperformance.Theresultsofourfull-scaleseismictestsofferprovensafetyandperformancesupportforstandardandnon-standardceilings,flexibledesignoptions,andmoreefficientinstallationdesigns.

ThefollowingCMCgridsystemsareacceptableforuseinInternationalBuildingCodeSeismicDesignCategories:200 Snap-Grid / 640, 650, 660 & 670 Drywall / 660 Wide Face / 730 All Stainless Steel / 830 All Aluminum / 1200 Seismic / 1260 Aluminum Cap / 4500 & 4600 Bolt Slot / 4000 Tempra™

ContactChicagoMetallicforspecificcomponentsandcorrespondingSeismicDesignCategories.Note:Checklocalcodeforinstallationrequirements.

Youwillfirstneedtoverifytheseismicdesigncategoryforthebuildinginwhichyouwillbeinstallingyourceiling.Thisinformationwillbedeterminedbythearchitectordesigneronrecord,andcanbefoundinthegeneralinformationsectionofthespecificationsorinthegeneralnotesonthestructuraldrawings.Youwillthenwanttorefertothebuildingcodeandinstallationstandardsthatarecurrentlybeingusedoracceptedinyourjurisdiction,andareavailablefromyourlocalcodeofficial.

ASeismicDesignCategory(SDC)isaclassificationassignedtoastructurebasedonitsoccupancyoruse(OccupancyCategory)andonthelevelofexpectedsoilmodifiedseismicgroundmotion.Thiscanbeexpressedschematicallyasfollows:[Occupancy Category] + [Soil modified seismic ground motion] SDC

GenerallyacceptedinstallationstandardsarebasedoncurrentversionsoftheIBC,ASCE-7,theCISCASeismicdocuments,andtheASTME580,andarestraightforward.Ifyouneedadditionalassistance,pleasefeelfreetocontactourTechnicalServicesteamat800-323-7164,option3.

Eachlocalorstategovernmentofficehasadepartmentthatmanagesbuildingpermitsandconstructionrequirements.Youshouldcontactthemtoseewhatinstallationstandardstheywillrequire.

Can I use any CMC grid in seismic applications?

Where can I find the information I need to install ceilings to meet seismic requirements?

Where can I find instructions detailing each step needed to install ceilings that meet seismic design categories?

How can I verify what codes my local or state officials require us to follow?

Seismic Ceiling Installation: FAQ

What is a seismic design category?

Seismic DesignCategory (SDC)

What does it mean?

A Very small seismic vulnerabilityB Low to moderate seismic vulnerabilityC Moderate seismic vulnerabilityD High seismic vulnerability

E and F Very high seismic vulnerability and near a major fault


ChicagoMetallichasdesignedaseismicperimeterclip,item#1496.00,whichprovidesfortheuseofa15/16)wallanglewhileeliminatingtheneedforperimeterspacerbars.ThiscliphasbeenrecognizedbyICC-ESasanalternativeinstallationthatiscompliantwiththeIBC.OfficialapprovalofthisalternativeremainsthepurviewoftheAuthorityHavingJurisdiction(AHJ).SeeICC-ESESR-2282atwww.icc-es.org.

ChicagoMetallic’sseismicgridsystem,includingthe1496.00perimeterclip,wasrigorouslytestedattheStructuralEngineeringEarthquakeSimulationLaboratory(SEESL)attheStateUniversityofNewYorkatBuffalo.Theevaluationprocess,includingroomsizetestingonshaketablesattheUniversityweremonitoredbyengineersfromChicagoMetallicandtheStateUniversityofNewYorkatBuffalo,aswellasbyengineersfromanindependentstructuralengineeringgroup,toinsureaccuratedatawasproperlycollectedandsummarized.ThisreportwasthensubmittedtoICC-ES,whereoursuspendedceilinggridandperimetercliphasbeenrecognizedbyICC-EStoperformasrequiredbythecurrentIBC.

Ourevaluationreport(ICC-ESR2282)fromICC-EScanbefoundontheirwebsiteatwww.icc-es.org.Theevaluationreportcanbefoundunderthesearchfunctiononthewebsite,byenteringeitherourmanufacturers’name(ChicagoMetallic),orourICC-ESreportnumber(2282).Thereportwillprovideindetailtheevaluationofourproductandproperinstallationrequirements.ThereisalsoalinktothereportdirectlyfromtheChicagoMetallicwebsite.

ChicagoMetallichasdesignedwhatwebelieveistheonlyseismicseparationjointalternativethathasbeenbothtestedattheStateUniversityofNewYorkatBuffaloandevaluatedbyanindependent,internationally-renownedstructuralengineeringgroup.TheSeismicSeparationTee(SST)fromChicagoMetallichasbeendesignedtoprovidemovementduetoseismicactivityalongtheseparationjoint.SeismicactivitycausestheSSTteestomovelinearly,thuseliminatingtheneedforaconventionalseparationjoint.

Otherbenefitsovercompetitiveproductsorstandardrecommendedinstallationsinclude:aone-stepinstallationprocess–Justinserttheteesandinstallpushrivetstocreatetheexpansionjoint,andyouaredone.Thereisnogoingbacktocutmainorcrossteesortoaddadditionalchannels,anglesorclips.

OurindependentstructuralengineeringgrouphaswrittenasummaryreportthatshowsthatourSSTperformsinsuchawaythatmeetstherequirementsoutlinedbytheIBC.ThisreportcanbedelivereddirectlytothecodeofficialbycontactingChicagoMetallicandprovidinguswiththecodeofficialscontactinformation(name,address)alongwiththeprojectnameandlocation.

My building owner does not like the 2) wall molding that is required in IBC seismic design categories D, E and F. Is there an alternative?

How can local code officials be sure that the use of the Chicago Metallic perimeter clip 1496.00 is compliant with the IBC?

Where can the local code officials or I find verification of the testing, or recognition byICC-ES?

Seismic Ceiling Installation: FAQ

Has an alternative method for seismic separation joints been developed yet?

Is there written documentation for the SST too?


Seismic Ceiling System Details

1496 Seismic Perimeter Clip

Thoughsuspendedceilingsareconsiderednon-structural,recommendationsforseismicstabilizationdoexist.However,traditionalseismicceilingconstructioniscostly.Additionaljointclips,wires,stabilizerbars,andseismicseparationjointsincreasethecostofmaterials,whileattachingseparatorclipsandfieldcuttingcrossteessignificantlyimpactlaborcosts.InadditiontoitsSeismic1200IntermediateandHeavyDutygrid,ChicagoMetallicnowintroducestheSeismicSeparationCrossTee(SST™)andPerimeterClip,bothofwhichcansaveupto75%inmaterialandlaborcostscomparedtotraditionalinstallationmethods.

Eachseismicdesigncategoryhasspecificrequirementsregardingperimetercomponents,andour1496SeismicPerimeterCliphasbeenengineeredtomeetthem.Currentcoderequirementsincludea2)wideperimeterwallmolding,andstabilizerbarstoprovidesupport,andpreventtheceilinggridfromspreadingapartalongthemolding.ChicagoMetallic’sSeismicPerimeterClipmeetsseismiccriteriasetforthbytheInternationalBuildingCode(IBC)tostabilizemainandcrossteesattheceiling’sperimeter,asdetailedinICC-ESReport#2282.Thiscliptiestogetherperimetercomponentsandhasbeentestedandrecognizedasanalternatemethodofstabilizingteesattheperimeter.Itsrobustconstructionallowscontractorstouseasleek15/16)angleinlieuofthelessdesirable2)angleandeliminatescostlystabilizerbars.ThePerimeterClipiseasytoinstall.Clearlyvisibledimensionmarkersontheclipshowtherequired3/8)or3/4)clearanceofthegridtothewall.Anintegralbackplateaccommodatestheadditionalattachmentofthecliptothewalland/orwallangleifdesired,andscrewholesprovideeasyattachmenttotheteewhennecessary.Theclipisabrightbrasscolor,makingiteasilyidentifiableduringon-siteinspections.Thecommercialqualitysteelclipfitscommongridcomponentsandcanbeusedwithlay-inpanelceilings.

ChicagoMetallic’sExposedTeegridincludesseismicandfire-ratedseismicconstructions.The1200SystemisofferedforIntermediateDutyandHeavyDutyperformanceperASTMC635tosatisfytherequirementsofallSeismiccodeconstructions.Theexposedteeconstructionpermitsdirectupwardaccesstomechanicalsystemsandisacost-effectivesolutiontoseismicrequirements.Stab-incrossteescantileverduringinstallationandwillnotfallout,makingforaneasierinstallationandprotectingagainstlateralpull-out.WhenusedwiththeSeismicSeparationTee,the15/16)widefacecreatesasleekceilingdesigninallseismicinstallations.

Seismic 1200 Exposed Grid

ThefollowingCMCsystemsgridareacceptableforuseinInternationalBuildingCodeSeismicDesignCategories:

1200Seismic 1260AluminumCap 660WideFace 4000Tempra™

4500Ultraline™

4600Ultraline™

ContactChicagoMetallicforspecificcomponentsandcorrespondingSeismicDesignCategories.

Note:Checklocalcodeforinstallationrequirements.

3/8)and3/4)dimensionmarkersBackPlate

TeeAttachmentScrewHoles

• Stab-incrossteeswithQuickClick™endclips.

• SST™CrossTeeeliminatesthethree-stepprocessofcompetitivealternatives.

• The1496SeismicPerimeterClipexceedstheIBCrequirementfor2)ledgesupport.

1496SeismicPerimeterClip

SST™CrossTees

15/16)WallAngle


> > > > PUSH TOWARDS < < < < < < < < PULL AWAY > > > >

Seismic Ceiling System Details

SST™ (Seismic Separation Tee)

ChicagoMetallic’sSST™SeismicSeparationTeeoffersaONE-stepprocesstomeetingIBCrequirements.Eachteehasonestaked-onstab-inendtabandanopposingelongatedintegralend.TheelongatedendsoftwoSSTsareinstalledonbothsidesoftheMainTeethathasbeendesignatedastheSeismicJoint,thenlockedinplacewithtwo(2)pushrivets.Inaseismicevent,seismicforcescausetheteestomovelinearly,thuseliminatingtheneedforaconventionalseparationjoint(seephotosbelow).

InadditiontothelaborsavedbygoingfromtheTHREE-stepprocessofreturningtotheassembledgrid,cuttingoffteeclips,andinstallingtwo-piecebrackets,theONE-stepSSTprocesseliminatestheneedformorechannels,wallangles,andadditionalhangerwires;doesnotinterferewithstruts,wires,orceilingpanels;helpskeepthegridsystemsquare,andpreservestheappearanceofthegridwork.

TheextendedintegraltaboftheSSTallowsittopushtowardsandpullawayfromthedesignatedseismicjointmainteeandmaintainastrongconnection.Thepushrivetsenablethejointtowithstandapulloutforceinexcessof180pounds.Theinternalfrictioninthejointalsoprovidesameasureofdamping.

elongatedintegralendtab staked-onstab-inendtab

designatedseismicjointmaintee

pushrivetslockeachSSTinplace

Toinstallsuspendedceilingsthatexceed2,500sq.ft.inseismiczones,theIBCrequiresseparationjointsthatallowcrossteestomovelaterallyduringaseismicevent.Traditionally,contractorscreatetheirownseismicsolutionsbyassemblingthegridandthenrevisitingtheassemblytocutthegridandbuildupconventionalseparationjointswithtees,channels,andangles.Thegridisthenstabilizedwithadditionalhangerwires.Inadditiontoincreasedmaterialcostsandtimeonthejob,thismulti-stepprocessrisksincurringdelayswhiletheconstructionmethodisinspectedandapproved.

Competitivealternativestothismethodincludeinstallingatwo-piecebracketatmain/crossteeintersections.Thissolutionrequiresthecontractortoinstallthegrid,thenreturntothegrid,cutoffthecrossteetabs,andattachthebracketwithscrews.WhilethesystemmaymeetIBCrequirements,itisaTHREE-stepcomponentandlaborintensiveprocess.

TheChicagoMetallicSST™istheonlyproductavailableinthemarkettodaythathasbeenbothtestedattheStateUniversityofBuffaloandreviewedbyanindependent,internationally renowned structural engineering group to be a viable solution forcreating seismic separation joints in IBC seismic design categories D, E and Finstallations.

Conventional Seismic Separation Joint


IBC Seismic Catagory C

A-1> <A-2 B-1> <B-2

UNATTACHEDWALL

UN

ATTA

CH

EDW

ALL

UN

ATTA

CH

EDW

ALL U

NATTAC

HED

WALL

UN

ATTACH

EDW

ALL

UNATTACHEDWALL

UNATTACHEDWALL UNATTACHEDWALL

Conventional IBC Installation CMC 1496 Clip Installation (ESR-2282)

3/8)

3/8)

SpacerBar7/8)Min.

SpacerBar 7/8)Min.

3/8)Min.

3/8)Min.

15/16)Angle1496Clip

1496Clip15/16)Angle

A-1

A-2

B-1

B-2

* LEGEND

• –12ga.hangerwire

–HorizontalRestraint(Refertoillustrationonpage11)

–SpacerBar


IBC Seismic Catagories D, E and F

C-1> <C-2 <D-3

D-1or

D-2>

(usethisoptionorD-2below)

(usethisoptionorD-1above)

ATTACHEDWALL ATTACHEDWALL

ATTA

CH

EDW

ALL

ATTA

CH

EDW

ALL

UN

ATTACH

EDW

ALL

UN

ATTACH

EDW

ALL

ATTACHEDWALL

UNATTACHEDWALL UNATTACHEDWALL

Conventional IBC Installation CMC 1496 Clip Installation (ESR-2282)

8)Max.

8)Max.3/4)

SpacerBar 2)Min.

8)Max.

15/16)Angle

PopRivet

15/16)AngleScrew

1496Clip

15/16)Angle

1496Clip

3/4)fromgridtoinsideofangle

2)Min.

PerimeterWire±10°fromvertical PerimeterWire

±10°fromvertical

PerimeterWire±10°fromvertical


PopRivet

Screw

C-1

C-2

D-1

D-3

D-2

12(O.C. 6(max.

12(O.C.

6(max.

12(O.C. 6(max.

12(O.C.

6(max.

* LEGEND



–SpacerBar

PopRivet


8)Max.

8)Max.


Seismic Separation Joint

IBC Seismic Catagories D, E and F

Conventional IBC Installation CMC SST™ Installation

1-1/2)

1448Channel 1448Channel

1428Angle DesignatedSeismicSeparation

SST™ElongatedIntegralEnds

SeismicJoint SSTrowstoeithersideofdesignatedseismicjoint

PushRivets

12(O.C.

12(O.C.

12(O.C.

12(O.C.

12(O.C.

12(O.C.6(O.C.max

6(O.C.max

* LEGEND



–SST

IMPORTANT! Do not place horizontal restraint over separation joint.

E> <F

E F

12(O.C.

12(O.C.

12(O.C. 12(O.C.


Seismic Horizontal Restraint

Thesehorizontalrestraintpointsshallbeplaced12(O.C. inbothdirectionswith thefirstpointwithin6(ofeachwall.BraceWiresshallbeattachedtoMainTeeswithin2)ofCrossTeeintersection,atamaximumangleof45°relativetoceilingplane.Wiresshallbetiedwithaminimumofthreetightwraps(seeASTMC636forexamples).

Forcompletedetails,pleaserefertothecurrentversionofASCE7.

Vertical Struts — Allowable LengthsMaximum Recommended Length for Vertical Struts1

EMT Conduit

1/2)EMT..........................................upto5(10)

3/4)EMT............................................upto7(8)

1)EMT...............................................upto9(9)

Metal Studs

Single1-5/8)metalstud(20gauge).................. upto12(0)

Single2-1/2)metalstud(20gauge).................. upto13(6)

Back-to-back1-5/8)metalstud(20gauge)....... upto15(0)

Back-to-back2-1/2)metalstud(25gauge)....... upto15(0)

Note:Plenumareasgreaterthan15(0)willrequireengineeringcalculations.

1Source: Northwest Wall & Ceiling Bureau Rev. 4/07

12ga.hangerwiretypical4(O.C.

VerticalPost

12ga.bracewiresconnectedtoMainTee

45°max

45°max

45°max

45°max

Literature Disclaimer: Presentations in this brochure or any other Chicago Metallic Corporation publication are correct to the best of our knowledge at time of preparation. We provide this information in an advisory capacity only. Any advisory recommendations given in our publications must be modified to conform with local codes, conditions and specifications. We reserve all rights to amend any information published in our literature without additional notice. Chicago Metallic can not be held responsible or liable for the selection nor application of our products.

Ceiling Systems and Specialty Products - USA and Canada: 800.323.7164 / Fax: 800.222.3744 / chicagometallic.combelgium / denmark / uk / germany / france / hong kong / prc / malaysia / united arab emirates / mexico

Chicago Metallic and its logo are Registered Trademarks of Chicago Metallic Corporation. Ultraline, Tempra, QuickClick and SST are trademarks of Chicago Metallic Corporation.© 2011 Chicago Metallic Corporation All Rights Reserved Printed in USA SNL0027A1411

Metal Perimeter Trim/ Curvilinear / Flat Metal Panel / Embossed Metal Panel / Linear / Open Plenum / Security

Chicago Metallic Ceiling Products

Panel Premium / Utility / Controlled Environment

Grid General Applications / Special Applications / Drywall Applications

SEISMIC CEILING SUSPENSION - Suppliers -...

Documents

Transcript of SEISMIC CEILING SUSPENSION - Suppliers -...