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Drywall Suspension System

Set Your Design Apart



Drywall ceilings take a dramatic new shape with the USG drywall suspension system. This advanced system is pre-engineered to simplify planning and construction, ensuring that your design looks as good in real life as in your original concept.

Offices

Lobbies

Conference Rooms

Schools

Retail

Hospitality

Entertainment

One System, Endless PossibilitiesOne System, Endless Possibilities

56 USGDrywallSuspensionSystem

C. Attachgypsumpanelstothesuspensionsystemmainrunners,crossteesandcrosschannelswithconventionalgypsumpanelfasteners(No.6TypeSHiLobuglehead,self-drilling,self-tappingsteelscrews)spaced8o.c.atperipheryofgypsumpanelsandlocated3/8infrompaneledgesandspaced12o.c.inthefield.Drivefastenersinfieldofpanelsfirst,workingtowardendsandedges.Holdpanelsinfirmcontactwithframingwhiledrivingfasteners.Drivefastenerheadsslightlybelowsurfaceofgypsumpanelsinauniformdimplewithoutbreakingfacepaper.(SeeGypsumPanelandAccessoriesSpecificationSA92709250).

D. Installtrimatallinternalandexternalanglesformedbytheintersectionofpanelsurfacesorotherdissimilarmaterials.Applycornerbeadtoallverticalorhorizontalexternalcornersinaccordancewithmanufacturer’sdirections.Ceilingsnote:SeeDrywall/SteelFramedSystemsSpecificationsSA92309250USG-3.Spacingofdrywallgridisdesignedtosupportonlythedeadload.Heavyconcentratedloadsshouldbeindependentlysupported.Lightingfixturesortroffers,airventsandotherequipmentshouldbeseparatelysupportedfromthestructure;gypsumpanelswillnotsupporttheseitems.Topreventobjectionablesaginnewgypsumpanelceilings,theweightofoverlaidunsupportedinsulationshouldnotexceed1.3psffor1/2thickgypsumpanelswithspacingof24o.c.;2.2psffor1/2thickgypsumpanels16o.c.framing,1/2Sheetrockinteriorgypsumceilingpanelson24o.c.framing,and5/8panels24o.c.;3/8gypsumpanelsmustnotbeoverlaidwithunsupportedinsulation.Avaporretardershouldbeinstalledinexteriorceilings,andplenumoratticspacesshouldbeproperlyvented.Duringperiodsofcoldordampweatherwhenapolyethylenevaporretarderisinstalledonceilingsbehindthegypsumpanelsitisimportanttoinstalltheceilinginsulationbeforeorimmediatelyafterinstallingthegypsumpanels.Failuretofollowthisproceduremayresultinmoisturecondensationinthebackofthegypsumpanelscausingsag.

E. Spray-texturedceilings:Wherewater-basedtexturingmaterialsoranyslow-dryingsurfacetreatmentareusedoversingle-layerpanels,maximumframespacingis16o.c.for1/2panelsappliedperpendiculartoframing.

3.05 A. ProvideaseparationinthesuspensionsystematexpansionjointsasshownonthedrawingsandcarrytheExpansionJoints jointthroughthegypsumpanels.Expansionjointsareinstalledbetweentwomainteestoseparatethesuspension

systemandallowformovementinlargeceilingareas.

3.06 A. ProvidecontroljointNo..093whichhasa3/32groundfordrywallandveneerplaster.CeilingareasshouldControlJoints notexceed2,500sq.ft.withperimeterrelief900sq.ft.withoutperimeterrelief.

Application Guide SpecificationsCurved Drywall Ceilings

The USG drywall suspension system allows you to create unique curved, domed, and conventional flat drywall ceilings. The system assembles quickly and easily for faster installation, reducing labor costs. System accessories and integrated straight and curved components offer easy transitions to vertical, horizontal, or curved surfaces. Plus, the USG drywall suspension system has a lifetime limited warranty when used with Sheetrock® brand gypsum panels.

User’s Guide

Pages

UnderstandYourSystem 2 Overview

Components

Accessories

DesignYourSystem 8 SystemApplications

SpecifyYourSystem 44 ApplicationGuideSpecifications

ForMoreInformation TechnicalService 800USG.4YOU

WebSite www.usg.com

� USGDrywallSuspensionSystem

Simplicity TheUSGdrywallsuspensionsystemisapre-engineereddrywallceilingsystemspecificallycreatedto

simplifythedesignandconstructionofflatandcurveddrywallceilings.Customcurvedmainteescombine

withourfamilyofstraightteestogiveyoutheabilitytodesignbreathtakingdrywallceilingssimply.

Savings Thisunique,pre-engineeredsystemcanreduceinstalledcostsupto40%versusconventionalcold-rolled

channelorsteelstuddrywallceilinginstallations.And,thesystemrequires12-gaugehangerwireinsteadof

9-gauge,allowingfasterinstallation.

Flexibility Usingstandardparts,drywallbarrelvaults,archways,valleys,waves,serpentines,anddomeseasily

transitiontoflatceilings,soffits,andacousticalceilingsuspensionsystems.Allmaintees(straightand

curved)canbefieldcuttospecificlengths.ThesystemisfullycompatiblewithmostUSGDonn®Brand

acousticalsuspensionsystems.Morethan30ULfire-rateddesignsareavailableforflatceilings.Thesystem

acceptsTypeFlightfixturesandTypeGlay-infixtures.

Quality USGdrywallsuspensionsystemcomponentscomewitha10-yearwarrantyandalifetimelimitedwarranty

whenyouuseSheetrock gypsumpanels.

Innovation TheUSGdrywallsuspensionsystemEstimatorisavailabletohelpyoudesigndomes,vaults,andother

curvedsurfaceselectronically.Thisintuitive,on-linetoolcaninstantlygenerateacompletebillofmaterials

anddetailedinstallationinstructionsbasedonthedimensionsyouinput.Formoreinformation,goto

www.usg.comandselectResources>OnlineTools.

AdditionalResources ForinformationaboutsystemsandmaterialscomplementarytotheUSGdrywallsuspensionsystem,seethefollowingUSGliterature:

Wall-to-Walldrywallsuspensionsystemforcorridorsandsmallrooms(AC3236)

TheGypsumConstructionHandbook(H17)

USGproductselectionguide(SA927)

Sheetrockgypsumpanelssubmittal(WB1473)

Interiorfinishingproductscatalog(J1424)

GuidetoachievingaLevel5finish(J1829)

Sheetrock®brandtuff-hiDe™primer-surfacersubmittal(J1613)

DrywallSuspension System


System Benefits

TheUSGdrywallsuspensionsystemgivesyoudistinctadvantagesoverconventionaldrywallceilinginstallationbyprovidingintegralsystemcomponentsthatallowyoutodesignuniquedrywallceilings.

Maintees Heavy-duty,fire-ratedsystemsforallflatceilingapplicationsincreaseflexibility;availablein1-1/2and15/16facewidthforflatceilings,and1-1/2facewidthforcurvedceilings.

Main-teesplices Integralreversibleenddetailforflatceilingswithfast,locked-in connections.

Crosstees Quick-releaSe™clipforfasterinstallation;eliminateswiretying;removeswithouttools;speedsrework.

Knurled-facecomponents Easierscrewpenetrationonallcomponents.

Galvanizedsteel Suitableforinteriorandexteriorapplications.

Systemflexibility Easilytransitionsfromsoffits,flatandcurvedsurfaces;alsotransitionstoacousticalceilings.

ULdesigns Morethan30UL-listedfire-resistantdesigns(themostdesignsintheindustry)areavailable.

Lifetimelimitedwarranty Lifetimelimitedwarranty(30year;seeSC2102)onsuspensionsystemwhenusedwithSheetrockgypsumpanels.

Standard�0-yearwarranty 10-yearonsuspensionsystem.

AcceptsTypeForGfixtures Lower-costTypeGfixturescanbeusedinadrywallinstallation. �2-gaugewire Easiertoworkwiththanthe9-gaugewirecommonlyprovidedwithsys-

temsbyothermanufacturers.

DesignTools TheUSGdrywallsuspensionsystemisthefirstpre-engineered,patentedsystemdesignedforcreatingdomedceilings.Nowvaultsanddomesareeasiertospecifyandbuild—andinstallationtimeiscutalmostinhalf.Thenewon-lineUSGdrywallsuspensionsystemEstimatorhelpsyoucreateperfectdomedandvaultedceilingsofalmostanysize.

Estimator Becausewe’veeliminatedtheguessworkoffieldbending,youareassuredapreciselycurvedfinishedproductthatmeetsyourexactdesignrequirements.WiththeUSGdrywallsuspensionsystemEstimator,allcurvedpartsaretoyourspecificationstocutandfastentogetherquicklyandeasily.

Howitworks:GotoResources>OnlineToolsatwww.usg.comandclick“USGDrywallSuspensionSystemEstimator.”Simplyentertheinformationrequired—typeofceiling,dimensions,andotherconstructiondetails.TheEstimatorquicklygeneratesacompletebillofmaterialsneededforthejob,plusstep-by-step,illustratedinstallationinstructions.Seepage24ofthisbrochureformoreinformationonhowtocreatedomedceilings.


11/2"

11/2"


System Components

RatedLoad

System ASTMClass Length Height ItemNo. Class 4HangerSpacingComponents

Straight DGLW HeavyDuty 12 1.617 DGLW26 16.0lbs./LF

Main

Tees

HeavyDuty 6to14 1.617 DGLW26s 16.0lbs./LF

DGL HeavyDuty 12 1-1/2 DGL26 16.0lbs./LF

HeavyDuty 7to14 1-1/2 DGL26s 16.0lbs./LF

Wall- DGW HeavyDuty 6to14,Custom 1.617 DGW26s ClassA 24.0lbs/LF

to-Wall

System

Straight

Tee

Cross DGLW — 2 1-1/2 DGLW224 —

Tees

— 26 1-1/2 DGLW2624 —

— 4 1-1/2 DGLW424 —

— 50 1-1/2 DGLW50 —

DGL — 2 1-1/2 DGL224 —

— 4 1-1/2 DGL424 —

— 8 1-1/2 DG824 ClassA —

CrossChannel — 4 7/8 DGCL4 7.4lbs./LF

Moldings — 12 1 DGWM24 — —

— 12 1-5/8 DGCM27� — —

1TheDGCM27moldingisforusewithDGLWteesonly.

11/2"

15/8"nom.

11/2"

15/16"

11/2"

15/16"

17/16"

7/8"

11/2"

1"

1"

15/8"

11/2"

15/8"nom.


RatedLoadSystem Radius Arc Height ItemNo. Class 2Hanger 4HangerComponents Length Spacing Spacing Curved Vault 31-44 6 1-1/2 DGW6VTxxx ClassA — 16.0lbs./LF

Main 45-60 8 1-1/2 DGW8VTxxx ClassA — 16.0lbs./LF

Tees

61-239 10 1-1/2 DGW�0VTxxx ClassA — 16.0lbs./LF

240+ 12 1-1/2 DGW�2VTxxx ClassA — 16.0lbs./LF

Valley2 31-44 6 1-1/2 DGW6VYxxx ClassA 16.0lbs./LF —

45-60” 8 1-1/2 DGW8VYxxx ClassA 16.0lbs./LF —

61-239 10 1-1/2 DGW�0VYxxx ClassA 16.0lbs./LF —

2Astestedperindependenttestingagency,valleysrequirehangerwirespacingof2oncenter.

11/2"

11/2"

15/8"

11/2"

Accessories DGSC-�80—SpliceClip DGTC-90—TransitionClip DGC4,DGC6,DGC8—Compässo™DrywallClip

DGWC—WallAttachmentClip DGSP-�80—SplicePlate DGHUB—DomeHub

CustomCurves Allcurvedmainteesarecustom-madetomeetdesignrequirementsandtodramaticallysimplifytheprocessofbuildingcurveddrywallceilings.Whetherdesigningbarrelvaults,domes,archways,valleys,wavesorserpentines,thecurvedgridallowsforsmoothtransitionstoflatceilings,soffitsoracousticalceilingsuspensionsystems.Below,intheitemnumbernomenclature,“xxx”isaplaceholderforacustomradiusininches.Forexample,DGW6VT360hasaradiusof360inches.


System Accessories

SplicePlate ThespliceplateconnectsfactorycutendsofallDGSP-�80 curvedmaintees,bothvaultsandvalleys. Whenbuildingadome,itconnectsprimarymain teetothedomehub.

TransitionClip ApplicationA ThetransitionclipsecurelyjoinstwointersectinggridDGTC-90 components,regardlessoffacewidth,ata90°angle. Benddowntabssecurethecliptothegrid.Screws arerequiredtoprovideastructuralconnection.

ApplicationB Thetransitioncliphasaslottedbendlineto FieldModified facilitateconnectinggridmembersthatare notinaline.

DomeHub ThedomehubservesasabasefromwhichprimaryDGHUB spokesareconnectedwithspliceplates.

SpliceClip ApplicationA TheprimarypurposeofthespliceclipistojointwoDGSC-�80 in-linemainteesfield-cuttolength,eitherstraight orcurved.

ThesearetheaccessoriesfortheUSGdrywallsuspensionsystem.Manyoftheaccessoriesaremulti-functional.Transitionsfromsoffits,curved,orflatsurfacescanbeeasierwiththeuseoftheseaccessories.


SpliceClip ApplicationB AnothercommonuseofthespliceclipisjoiningDGSC-�80 twogridteesthatareintersectingoffmodule,such

asautilityopening.Thelinkjoiningthebenddowntabsontheclipiscutallowingittobefoldedontheslottedbendline.

ApplicationC Thespliceclipalsoisusedtoconnecttwomain FieldModified teesthatareinlinebutintersectingatanangle, suchasaflatceilingtransitioningtoavault.This applicationrequiresnotonlycuttingtheconnecting

linkbutalsoseparatingtheclipattheslottedbendline.Thetwohalvesarethenrejoinedwithapop-rivetorscrewthroughtheholesontheclipends.Usetopholeinclipforstraighttovaults.Usebottomholeinclipforstraighttovalleys.

Wall ThewallattachmentclipactsasaspacerbetweenAttachment thewallsurfaceandthewebofthegridwhencurvedClip mainteesneedtobesecuredtothewallatawallDGWC stud.Thispreventstwistingofthegridandinsures asoundinstallation.

Compässo™Clips compäSSo suspensiontrimclipsareavailabletomatchDGC4 DCC�0 4, 6, 8, 10 and12compäSSo trim.TheseclipsDGC6 DGC�2 areadjustableforboth1/2and5/8drywall.TheDGC8

twoportionsofthecliparepivotedtoaccommodatecompäSSo trimatanyangleinrelationtothegrid.


A

9

B

9

A-�

75%

drywallmaintees

drywallcrosstees

channelmolding

12ga.hangerwires

SHEETROCKgypsumpanel

Flat Drywall Ceilings

– Main-teeandcross-teespacingisprovidedinthetableonpage30. – Seepages32-35forspecialrequirementsforfireratedassemblies.

Note:Theserenderingsanddetailsareprovidedforillustrativepurposesonlyandarenotasubstituteforcertifiedarchitecturalandengineeringdrawings,nordotheynecessarilyreflectnationalandlocalbuildingcoderequirements.Foradditionalinformation,seespecificationsonpage40orcallTechnicalServiceat1-800-USG-4YOU.

DrywallceilinginstallationusingtheUSGdrywallsuspensionsystemisupto50%fasterthancold-rolledchannelandhat-channelinstallation.Pre-engineeredcomponentsaredesignedformaximuminstallationspeed.Pre-indexedmain-teeholesmakemeasuring,aligning,andsquaringthesystemmucheasier.


9

A

crosstee

main-teesplice

maintee

fireexpansionnotch

12ga.hangerwire


Crosstee/mainteeintersection Cross-channeldetail

Perimeterdetail—channelmolding Perimeterdetail—anglemolding

crossteeorcrosschannel

screwintomoldingatperimeter

anglemolding


Balt

9

fireexpansionnotch

12ga.hangerwire


main-teesplice

maintee

crosschannel

9

Aalt

maintee


channelmolding

screwintomoldingatperimeter

B

9

�0 USGDrywallSuspensionSystem

drywallmaintee

knurledchannelmolding

12ga.hangerwire

acousticalmaintee

acousticalcrosstees

acousticallay-inpanel

drywallcrosstees

acousticalmaintee


C

��

D

��B

9

A-2

Transitions

ThenewUSGdrywallsuspensionsystemisfullycompatiblewithourDonn®brandDX®/DXL™,DXSS,DXW,andcentricitee™ acousticalsuspensionsystems,makingiteasytotransitionbetweenflatdrywallandacousticalceilings.Flushoroffsettransitionsarepossible.Additionalcrossteesarenecessaryatdrywalledgetoprovideadequatesupport(asshownonnextpage).

Note:Theserenderingsanddetailsareprovidedforillustrativepurposesonlyandarenotasubstituteforcertifiedarchitectural

andengineeringdrawings,nordotheynecessarilyreflectnationalandlocalbuildingcoderequirements.Foradditionalinformation,seespecificationsonpage40orcallTechnicalServiceat1-800-USG-4YOU.

Drywall to Acoustical Ceilings

�� USGDrywallSuspensionSystem

acousticalmaintee

drywallmaintee

drywallcrosstee

crosstee

acousticalcrosstee

spliceclip


drywallbead

C

��

11/2"9/16"

or15/16"

4" 3"


acousticalpanel

crosstee

drywallmaintee

acousticalmaintee

Calt

��

drywallbead

drywallmaintee

drywallcrosstee

additionaldrywallcrosstee

2"to4"

acousticalmaintee

acousticalmaintee

acousticalceiling

drywallbead

drywallceiling

acousticalcrosstee

drywallcrosstee

acousticalcrosstee

SHEETROCK

gypsumpanel

acousticalpanel

D

��

maintee


acousticalpanel

channelmolding

Dalt-�

��

Drywall-to-acousticaltransition—field-cutconnection Drywall-to-acousticaltransition

Planview

Drywall-to-acousticaltransition—factory-endconnection Flushtransition Standardoffset

tee


acousticalpanel

channelmolding

Dalt-2

��

attachcrossteeswithmechanicalfasteners

additional2'drywallcrosstee(offmodule)attachwithmechanicalfasteners

acousticalmaintees 4'-0"acousticalcrosstees

2'-0"acousticalcrosstees

acousticalceiling

drywallceiling

lineofdrywall

extradrywallcrossteesgypsumpanelsupport-offmodule;attachtoadjacentslotsinmaintee

hangerwires

4'-0"drywallcrosstees

drywallmaintees

crosstee

crosstees


E

�3

F

�3

F

�3

B

9

G

�3

H

�3

C-�

75%


Boxed Soffits


TheUSGdrywallsuspensionsystemisthebestchoicefordesigningandbuildingsoffits.Soffitscannowbebuiltwithamuchlowercostthanwithmetalstudconstruction.

Soffitsuspensionsystemcomponentsareidenticaltothecomponentsusedinflatsurfaceareas. – Insomeinstances,hangerwires,bracing,andgridcomponentshavebeenomittedortruncatedforclarity.

Foradditionalinformation,pleasecontactTechnicalService. – Whenconstructingsoffits,bracingofthedrywallsuspensionand/oradditionalhangerwiresmaybe

necessarytoensurestabilityandstructuralperformanceduringandafterdrywallattachment. – Themaximumverticalsoffitheightis48withcrossteesspaced24oncenter.(Maximumunsupported drywallarea48x24).Intermediatecrossteesarenotnecessarywhensoffitdimensionsdonotexceed24. – Whenusedinsoffitconstruction,allTransitionClipsaretohaveaminimumof4screwsforattachment.



anglemolding

transitionclip

mainteeorcrosstee

mainteeorcrosstee


E

�3

90˚outsidecornerusingtransitionclip 90˚outsidecornerwithfield-cuttee

channelmolding

tee

maintee

crossteeSHEETROCKgypsumpanel

H

�3

90˚insidecorner 90˚outsidecornerwithmainteeatbottomedge

90˚insidecornerwithchannelmoldingattopedge

anglemolding

mainteeorcrosstee


Ealt

�3

transitionclip

maintee

anglemolding

tee


G

�3

bendtransitionclip

transitioncliptee11/2"x1"anglemolding


maintee

F

�3


maintee

12ga.hangerwire

crosstees

curvedmaintee

mainteesplice

transitionclip

SHEETROCK

gypsumpanelknurledchannelmolding

anglemolding

acousticalmaintee

acousticalcrosstees

acousticallay-inpanel

brace

J

�5

I

�5

K

�5

F-�

Curved Soffits

Designandbuildsoffitseasier,quickerandmoreeconomicallyusingtheUSGdrywallsuspensionsystem.

Constructcurvedsoffitswithcurvedmaintees.Createvaults,valleys,andcombinations,andshiftfromhorizontalorverticalstraightareaswithease.Foraddedflexibility,gridmemberscanbefield-cutandjoined.

– Insomeinstances,hangerwiresandbracinghavebeenomittedandcomponentstruncatedforclarity.Foradditionalinformation,pleasecontactTechnicalService.

– Whenconstructingcurvedsoffits,bracingofthedrywallsuspensionand/oradditionalhangerwiresmaybenecessarytoensurestabilityandstructuralperformanceduringandafterdrywallattachment.Seepage19forhangerwirespacingrequirements.

– Themaximumverticalsoffitis48withcrossteesspaced24oncenter.(Maximumunsupporteddrywallarea48x24).Intermediatecrossteesarenotnecessarywhensoffitdimensionsdonotexceed24.

– AllTransitionorSpliceClipsaretohaveaminimumof4screwsforattachment.


Curved Drywall Ceilings


crosstee

maintee


modifiedtransitionclip

valleymaintee

angle(byothers)

J

�5

crosstee

maintee


spliceclip

valleymaintee

I

�5

8"max.

48"max.


transitionclip

acousticalpanel

bracingasrequired

channelmolding

K

�5

Curvedsoffittoboxedsoffit—valleytoflat Sectionthroughsoffitandacousticaltransition

Curvedsoffit—flattovalley

modifiedtransitionclip

main tees

angle molding

SHEETROCK gypsum panel

Corridors

TheUSGwall-to-walldrywallsuspensionsystemisdesignedtocreateconventionalflatdrywallceilingsincorridorsandsimilarspaceswithspansoflessthan14ft.Thisframingsolutioniseasiertoworkwiththanblackironandfurringchannelsordrywallstuds,andithelpstoreducelaborcosts.

Thesystemassemblesquicklyandeasily,framingnarrowerspacesefficientlyandwithaminimumofcomponents.Systemaccessoriesandintegratedstraightcomponentsoffereasytransitionstovertical,horizontal,orcurvedsurfaces.

Thewall-to-walldrywallsuspensionsystemincludes6,8,10,12and14double-web,rotarystitchedknurledtees,and12knurledanglemolding.TeesaretestedinaccordancewiththeuniformloadtestproceduresoutlinedinASTMStandardC635,andcertifiedbyanICBOlistedtestingagency.LoadsarelimitedtoL/240ofeachspan,perASTMC645.

Wall-to-Wall System


SupportRequirements Shortspansrequirenoverticalsupports;spansexceedingsixfeetcanbesupportedwithhangerwireorvariousfield-assembledoptions.Verticalsupportscanbeattachedtoeachteeortoafield-assembledperpen-dicularsupport,4’o.c.

SupportOptions HangerWire ScrapWallAngle3

ScrapSteelStuds

3.Splicedteescanbesupportedwithscrapwallangleorsteelstuds.

Main-TeeSpliceOptions4

4.Fieldassembledperpenticularsupport:spliceclipsorteescraps.

16" or 24"

angle molding

DGW26s wall-to-wallmain tee

scrap-tee splice for main-tee option

DGSC180 splice-clip option



L

�7

D-�

maintee

curvedmaintee

SHEETROCKGypsumPanel

Fascias

CurveddrywallfasciascanbeeasilydesignedandbuiltwiththeUSGdrywallsuspensionsystem.

– Main-teeandcross-teespacingisprovidedinthetableonpage30. – Hangerwiresmustbeplacedwithin12ofthefasciawheremainteesandcrossteesintersectthefascia. – Extrahangerwiresmayberequiredattheperimeteroffasciaapplicationstoensureadequatesupport

andstability,suchascrossteeslessthan12inlength.




Curveddrywallfascia(upto8max.)forflatceilings

L

�7

attachwithscrewortransclip

4"max.

12"max.

L-bead

curvedmainteetee

flexibledrywalltrim

Lalt

�7

attachwithscrewortransclip

attachwithscrew

supportbrace

8"max.

L-beadcurvedmaintees

teeflexibledrywalltrim

12"max.


N

�9

Malt

�9

M

�9

C-�

78%

crossteesSHEETROCKgypsumpanel

12-ga.hangerwire

COMPÄSSOdrywallclip

COMPÄSSOtrim

UseUSG’scompäSSo suspensiontrimtofinishUSGdrywallsuspensionsystemceilings.

– Main-teeandcross-teespacingisprovidedinthetableonpage30. – Hangerwiresmustbeplacedwithin12ofthefasciawheremainteesandcrossteesintersectthefascia. – Extrahangerwiresmayberequiredattheperimetertoensureadequatesupportforcrossteeslessthan

12inlength.


Fascias


2� USGDrywallSuspensionSystem

CompässoTrimperpendiculartomainteeorcrosstee CompässoTrimparalleltomainteeorcrosstee

Viewfromabove Viewfromabove


COMPÄSSOtrim

tee

SHEETROCK

gypsumpanel

N

�9


COMPÄSSOtrim

tee

12"orless


M

�9

Malt-�

�9

COMPÄSSOtrim

COMPÄSSOclip

tee

screw-attached

Malt-2

�9

COMPÄSSOtrim

COMPÄSSOcliptee

screw-attached


maintee


12ga.hangerwire

splayedhangerwires

crosstees

curvedmaintee

main-teespliceplate

SHEETROCKgypsumpanels

P

2�

O

2�

B-�

Vaults

Createbarrelvaults,archways,valleys,andwaveswitheaseusingtheUSGdrywallsuspensionsystem.Integralclipsallowforasmoothtransitiontoflatceilings,soffits,oracousticalsuspensionsystems.

– Hangerwiresshallbespacedamaximumof48alongthearcofVaultsmaintees. – Additionalhangerwiresorbracingmaybenecessarytostabilizecurvedceilingsduringandafter

drywallattachment. – Atleast1hangerwireisrequiredwithin8ofacurvedmainteesplice. – Hangerwiresarerequiredwithin8onbothsidesofamodifiedspliceclipattachedtothenearest

hangerholes. – Atleast1hangerwireisrequiredwithin8ofatransitionclip. – Alldrywalljointsmustbeaminimumof12fromallmainteesplices. – Insomeinstances,hangerwires,bracingandgridcomponentshavebeenomittedortruncatedforclarity.

Foradditionalinformation,pleasecontactTechnicalService.




Vaulttovault—factory-endconnection Vaulttovault—field-cut

Flattovaultwithanglegreaterthan90º Flattovaultwith90ºangle(notshowninprecedingperspective)

modifiedspliceclip

crosstee

curvedmaintee

spliceplate

SHEETROCKgypsumpanel O

2�

crosstee

crossteemaintee


modifiedspliceclip

anglemolding

P

2�

crosstee

anglemolding

maintee


transitionclip

curvedmaintee

crosstee

Q

2�

crosstee

curvedmaintee

spliceclip

SHEETROCKgypsumpanel Oalt

2�


R

23

T

23

S

23

U

23

E-2

maintee

12ga.hangerwire

splayedhangerwires

crosstees

curvedmaintee

spliceclip

SHEETROCKgypsumpanels

Vaults and Valleys


TheUSGdrywallsuspensionsystemsimplifiescurveddrywallceilingdesign.Itmakescreatingvaultsandvalleyseasier.

– Hangerwiresshallbespacedamaximumof48alongthearcVaultsmaintees. – Hangerwiresshallbespacedamaximumof24alongthearcofValleymaintees. – Additionalhangerwiresorbracingmaybenecessarytostabilizecurvedceilingsduringandafter

drywallattachment. – Atleast1hangerwireisrequiredwithin8ofastandardcurvedmainteesplice. – Hangerwiresarerequiredwithin8onbothsidesofamodifiedspliceclipattachedtothenearest

hangerholes. – Atleast1hangerwireisrequiredwithin8ofatransitionclip. – Alldrywalljointsmustbeaminimumof12fromallmainteesplices. – Insomeinstances,hangerwires,bracingandgridcomponentshavebeenomittedortruncatedforclarity.

Foradditionalinformation,pleasecontactTechnicalService.



cross tee

vault main tee

valleymain tee

splice clip

SHEETROCK gypsum panel

T

23

curvedmaintee

wall

wallattachmentclip

shimasrequired

S

23

spliceclip

vaultmaintee


crosstee

shimasrequired

spliceclip

wall

vaultmaintee


crosstee

wall

U

23

crosstee

vaultmaintee


spliceclip

R

23

spliceplate


crosstee

vaultmaintee

valleymaintee

Talt

23

Vaulttovalley—field-cutconnection Vaulttovalley—factory-endconnection

Curvedmainteeperpendiculartowallconnection(sectionandisometricview) Acuteintersectionvaulttee

vaultmaintee

SHEETROCKgypsumpanelanglemolding

wall

valleymaintee

SHEETROCKgypsumpanelanglemolding

wallvalleymaintee


anglemolding

wall

vaultmaintee


anglemolding

wall

Ualt

236alt2

E-2

6alt3

E-2

6alt4

E-2

Vaulttoflat—field-cutconnection Curvedmainteetoparallelwallconnection

bendspliceclip90°


W

25

X

25

V

25

L

�7

primaryspoke

secondaryspoke

crosstee

Domes

TheUSGdrywallsuspensionsystemofferspre-engineeredsolutionsfordomeceilings.Itprovidesalow-costalternativetolabor-intensivesystemssuchasconventionalfield-benthat-channelsteelandblack-ironsuspensions.Usingthepre-fabricatedhubandpre-formedcurvedtees,constructingdomeshasneverbeeneasier.TheUSGdrywallsuspensionsystemEstimatormakesitsimplertobuildthedomewithfinishingoptionsrangingfromplasteranddrywalltopre-engineeredGRGpanels.

– Hangerwiresshallbespacedamaximumof32alongeachspoke. – Additionalsecondaryspokesarerequiredwhenspacingbetweenprimaryspokesexceeds48. – Hangerwiresarerequiredatbothendsofallsecondaryspokes. – Crossteesarerequired16o.c.maximum.



Hubandprimaryspokes Firstheaderandsecondaryspokes Secondheaderandsecondaryspokes

Crosstees Lathandplasterfinish

Detail�:Top-connectorspokehub Detail2:Header-to-spokeconnection

Detail3:Secondaryspokeconnection

W

25

primaryspoke

topview

removeinfield

header

V

25

curvedprimaryspoke

domehub

spliceplate

X

25

secondaryspoke

header


drywallmaintees

drywallcrosstees


12-ga.hangerwires


E-�

Z

27

Zalt

27

Y

26

Utility Interfaces

TheUSGdrywallsuspensionsystemeasilyaccommodatesconventionallightfixtures,accessdoors,orHVACceilingdiffusers.


Accessdoor Accessdoor

crosstees

accessdoor

off-modulecrosstee

maintee

16"

16" 24"

24"

16"

16"

16"

1"x19/16"x1"knurledchannelmolding

SHEETROCK

gypsumpanel accessdoor(byothers)

spliceclip

Y

26



ATypeGfixture,commonlyusedinsuspendedacousticalsuspensionceilings,requires15/16-facemainorcrossteestobelocatedoneither24or48centers.DrywalliscutevenwiththegridflangesandtrimmedwithJ-orL-bead.Thefixtureispassedthroughtheopeningandloweredtorestonthegridflanges.

ATypeFlightfixturehaslowerflangesthatcapthecutedgesofthedrywall.Thisfixturetypicallyrequiresafull24or48opening,andmanysystemsrequiregridmemberstobeinstalled“off-module”toaccommodatethelight.AllUSGdrywallsuspensionsystemmainteesarefactory-punchedwithathree-slotcrossteeholepatternevery8soTypeFlightfixturescanbepositionedinavarietyoflocationswithinagridopeningwith-outfield-modifyingsupporttees.TypeFlightfixturesareraisedintotheopeninguntiltheflangescontacttheceiling.Securingdevicesonthefixtureareadjustedtosuspendthefixturefromthegridandpullittighttotheceilingsurface.

TypeGlightfixture

TypeFlightfixture

48" cross tee

24" cross tee

main

tee

main

tee

hanger wire

Type Glight fixture 15/16"tee

TypeGlightingfixture

SHEETROCK

gypsumpanelJ-orL-bead

24"

Z

27

tee

flange

swingarmjack

mountingscrew

TypeFlightingfixture


241/4"253/4"

Zalt

27

Type Flight fixture

48" cross tee

48" cross tee

48" cross tee

48" cross tee

48" cross tee

48" cross tee

50" c

ross

tee

main

tee

main

tee

hanger wire

Type F light fixture

48" cross tee

48" cross tee

48" cross tee

48" cross tee

48" cross tee

hanger wire

48" cross tee

50" c

ross

tee

50" c

ross

tee

main

tee

main

tee

Type Flight fixture

48" cross tee

48" cross tee

48" cross tee

48" cross tee

48" cross tee

48" cross tee

50” c

ross

tee

main

tee

main

tee

hanger wire

3/4"widefillerpiece

taperededgeofboard


AA

29

BB

29

G-�

60%

Utility Interfaces

Curveddrywallceilingscreateexcitinglightingdesignopportunities.Theinterfaceoflightfixtureswithcurvedceilingsurfacesrequirescarefuldesignconsideration.Stem-andcable-styleindirectanddirectlightchoicesarepossiblesolutions.Recessedflatsectionscanbebuiltintocurvedsectionstoaccommodatelightfixtures.Sconcesarealsoveryeffectivewithavaultedceiling.

Wheninstallingdownlightsinconcaveorconvexceilings,theapplicationofaflattrimringwillcauseagap.Thisgapwillvarydependingontheceilingradius,trimringdiameterandinstallationtolerances.Formoreinformation,consultTechnicalService.




AA

29

crosstee

light-fixturemountingbracket

lightfixture


BB

29

crossteelight-fixturemountingbracket

lightfixture


Pendantfixture—vault Incandescentfixture—recessedflatceiling


Applying Sheetrock Gypsum Panels

PanelSelector BoardThickness Maximum Maximum MaximumforFlatCeilings Main-Tee Cross-Tee/Channel �2-Ga.Wire On-CenterSpacing On-CenterSpacing On-CenterSpacing

1/4doublelayer,Sheetrock gypsumpanels 48 16 48


1/2doublelayer,Sheetrockgypsumpanels 48 16 42


3/4Sheetrock gypsumpanels 48 24 48

1/2Sheetrock interiorgypsumceilingpanels 48 24 48

1/2Sheetrock firecoDe® andfirecoDe Cpanels 48 16 48

5/8Sheetrock firecoDe andfirecoDe CPanels 48 24 48

5/8Sheetrock exteriorgypsumceilingpanels 48 24 48

1/2imperialgypsumbase 48 16 48

5/8imperialfirecoDe andfirecoDe Cgypsumbase 48 16 48

1/2fiberock®aQua-tough®interiorpanels 48 24 48

5/8fiberock aQua-toughinteriorpanels 48 24 48

1/2Durock®cementboard ContactTechnicalService

5/8Durockcementboard

Notes: – Radiuseddouble-layer1/4gypsumpanelswilltransitionto5/8flatgypsumceilings.Seepage8. – Forfire-ratedceilingapplications,seepages32-33andcontactTechnicalService. – Forexteriorceilingapplications,seepage34andcontactTechnicalService. – Forgypsumpanelweights,seeThe Gypsum Construction Handbook,page9(CentennialEdition). – Fordouble-layerceilingapplications,a12-ga.hangerwireisneededoneachcrossteewithin8in.ofthewall(forallcrossteeslon-

gerthan8"). – ForDurockcementboardapplications,contactTechnicalServiceat800USG.4YOU.

ExpansionJoints Atbuildingmovementandexpansionjointsprovideaseparationinthesuspensionsystemandinstallbacktobackmainteestoallowforbuildingmovement,expansion,andcontractioninlargeceilingareas.

ControlJoints Controljointsareusedtocontrolstresscausedbyexpansionandcontractionacrossthecontroljointinlargeceilingexpansesinbothdrywallandveneerplastersystems.Usecontroljoint093,whichprovidesa3/32groundfordrywallorveneerplasterforceilingareasthatexceed50(2500sq.ft.)withperimeterreliefand30(900sq.ft.)withoutperimeterrelief.Forfire-ratedceilings,controljointsshallnotoccurwithin12ofthefireexpansionnotch.Donotseparatesuspension:Usecontinuoussinglemaintees.

SpecialNote Locationofcontrolandexpansionjointsaretheresponsibilityofthedesignprofessional.Gypsumpanel surfacesshouldbeisolatedwithcontroljoints,caulk,orothermeanswhere: – Ceilingorsoffitabutsastructuralelement,column,partition,orotherverticalpenetration. – Constructionchangeswithinaplaneoftheceiling. – Ceilingdimensionsexceed50ineitherdirection(2500sq.ft.)withperimeterreliefor30(900sq.ft.)

withoutrelief. – Soffitexceeds30ineitherdirection. – Wingsof“L”,“U”and“T”shapedceilingsareasarejoined.

1/2"to1"SHEETROCKgypsumpanel

min.25-gaugefillerstrip(byothers)

maintees

1/2"

USG093controljoint

maintees


Alifetimelimited(30-year)warrantyontheUSGDrywallSuspensionSystemisofferedwhenSheetrock BrandGypsumPanelsareused.TheUSGDrywallSuspensionSystemisengineeredtoprovidetheultimateindesignflexibilityandwillaccept1/4,3/8,1/2,5/8,and3/4gypsumpanelsforflatandcurvedceilingapplications.Veneerplasterapplicationsarealsoavailable.


PanelSelector Singlepanel,L/240uniformload,single-spandesign.forWall-to-WallSystem Spacemain-teemembersasrequiredbyspananddesignload. BoardThickness 0Supports �Support 2Supports

Mid-Span,EachMainOr �/3Points,EachMainOr ToAPerpendicularSupport ToAPerpendicularSupport

1/2Sheetrock gypsumpanels upto7span 7-1to14span

5/8Sheetrock gypsumpanels upto6span 6-1to12span 12-1to14span

MaximumLoads Maximumspacingbetweenhangersand/orsupports.

Unsupported Mains Maximum Span Load

L/240,perASTMC645 4 16o.c. 18lbs./SF

24o.c. 12lbs./SF

5 16o.c. 9.2lbs./SF

24o.c. 6.1lbs./SF

6 16o.c. 5.3lbs./SF

24o.c. 3.6lbs./SF

7 16o.c. 3.4lbs./SF

24o.c. 2.2lbs./SF

L/360,perASTMC645 4 16o.c. 12lbs./SF

24o.c. 8lbs./SF

5 16o.c. 6.1lbs./SF

24o.c. 4.1lbs./SF

6 16o.c. 3.6lbs./SF

24o.c. 2.4lbs./SF

7 16o.c. 2.2lbs./SF

24o.c. 1.5lbs./SF

Applying Sheetrock Gypsum Panels

DesignWeights Thefollowingareprovidedforguidance.

ProductName Thickness Weight(lbs./SF)

DuroCk®BrandPanels 1/2 3.0

5/8 3.75

FiberoCk®BrandPanels Abuse-resistantInteriorPanel 1/2 2.2 5/8 2.7

aQua-tough™InteriorPanel 1/2 2.2

5/8 2.7

VHIabuse-resistantInteriorPanel 5/8 2.7

imperial®BrandGypsumBase RegularCorepanel 1/2 1.8

firecoDe®Corepanel 5/8 2.3

firecoDe®CCorepanel 1/2 2.0

5/8 2.5

ultracoDe®Corepanel 3/4 3.0

sheetoCk®BrandPanels Gypsumpanel 1/4 1.2

3/8 1.4

1/2 1.7

54long 1.7

Abuse-resistantgypsumpanel 1/2 2.2

5/8 2.7

Ceilingboard,interior–sagresistant 1/2 1.6

Ceilingboard,exterior 1/2 1.9

5/8 2.4

Ceilingboard,exterior–firecoDeCore 5/8 2.4

Flexiblegypsumpanel 1/4 1.2

firecoDe®Coregypsumpanel 5/8 2.2l

firecoDe®CCoregypsumpanel 1/2 1.9

5/8 2.5

humitek®gypsumpanel 1/2 1.9

humitek®firecoDe®Coregypsumpanel 5/8 2.4

ultracoDe®Coregypsumpanel 3/4 2.8

Water-resistantgypsumpanel 1/2 1.8

5/8 2.2

Water-resistantfirecoDe®CCore 1/2 1.9 gypsumpanel

struCtobase®BrandPlaster Wet 1 12

Dry 1 10



PanelSelector CurvedMainTees5 GypsumBoardThicknessOptions6

forCurvedCeilings Radius Arc CrossTee ItemNo. HangerWire Parallel7 Perpendicular7

Length Spacing Spacing Vault 31-44 6 8o.c. DGW6VTxxx 48 — 1/4flexdoublelayer8

45-60 8 8o.c. DGW8VTxxx 48 — 1/4doublelayer

61-91 10 8o.c. DGW10VTxx 48 1/4doublelayer8 1/4doublelayer

92-239 10 16o.c. DGW10VTxxx 48 1/4doublelayeror3/8 1/4doublelayeror3/8

240+ 12 16o.c. DGW12VTxxx 48 1/4doublelayeror1/2 1/4doublelayeror1/2

Valley 31-44 6 8o.c. DGW6VYxxx 24 — 1/4flexdoublelayer

45-60 8 8o.c. DGW8VYxxx 24 — 1/4doublelayer

61-91 10 8o.c. DGW10VYxxx 24 1/4doublelayer 1/4doublelayer

92-239 10 16o.c. DGW10VYxxx 24 1/4doublelayeror3/8 1/4doublelayeror3/8

5Allcurvedmainteesaretobespaced48o.c. 6Inamultiple-radiuscurvedceiling,selectpanelthicknessbasedonthesmallestradiusinthedesign. 7Seedrawingsbelow. 81/4gypsumpanelsmustbeappliedinadoublelayerfordurabilityandfinishing.

Parallel “Parallel”referstothelongwrappededgesofthegypsumpanelappliedparalleltothecurvedmaintees.ApplicationofDrywall

Perpendicular “Perpendicular”referstothelongwrappededgesofthegypsumpanelsappliedperpendiculartothecurvedApplication maintees.ofDrywall


Fire-Rated Assemblies by UL Designs

Concrete/SteelDeck D501 2HR-R 5/8 Sheetrock firecoDeC N/A N/A Min.2ltwt.concreteonMin.W8x17FloorsOverSteelBeams 1-1/2HR-UR beams 2HR-UBR

D502 2HR-R&UR 5/8 Sheetrock firecoDeC 2x4 144sq.in. Min.2-1/2normalwt.concretetoppingon 2HR-UBR 1P-X2,1PC-AR,&WRC (24%) Min.W8x28beams

D503 2HR-R&UR 5/8 Sheetrock firecoDeC 6dia.incandescent N/A Min.2-1/2normalwt.concreteon2steel 2HR-UBR 4per100sq.ft deckonmin.W12x19beams.

Concrete/Expanded G523 2HR-R&UR 5/8 Sheetrock firecoDeC 2x4 144sq.in. Min.2-1/2normalwt.concretetoppingonLathFloorsOver 3HR-UBR 1P-X2 (24%) Min.8J2joistsandW10x21beamsSteelJoistsandBeams G524 2HR-R&UR 1/2 Sheetrock firecoDeC N/A 113sq.in. Min.2-3/4or2-1/2ltwt.ornormalwt. 2HR-UBR 1P-X2,1PC-AR,&WRC concretetoppingonmin.8or10Hambro

joists,respectively,andmin.W8x24beams

G525 2HR-R&UR 5/8 Sheetrock firecoDeC N/A 113sq.in. Min.3-1/2or3-1/4normalwt.concrete 2HR-UBR toppingonMin.8or10Hambrojoists,

respectively,andW8x24beams

G526 2HR-R&UR 1/2 Sheetrock firecoDeC 2x4 57sq.in Min.2-1/2normalwt.concretetoppingon 2HR-UBR (25%) Min.8J2joistsandW10x21beams

G527 2HR-R&UR 1/2 Sheetrock firecoDeC N/A N/A Min.2-1/2normalwt.concretetoppingon 3HR-UBR 1P-X2&1PC-AR Min.8J2joistsandW10x21beams

G528 1-1/2HR-R&UR 1/2 Sheetrock firecoDeC N/A N/A Min.2-1/2normalwt.concretetoppingon Min.10J2joists

G529 2HR-R&UR 1/2 Sheetrock firecoDeC 2x4 57sqin Min.2-1/2normalwt.orltwt.concrete 2or3HR-UBR (24%) toppingonMin.10J2joistsandW8x24beams

3HR&UR 1/2 Sheetrock firecoDeC 2x4 57sqin Min.3-1/4normalwt.concretetopping 3HR-UBR (24%) onMin.10J2joistsandW8x24beams

3HR-R&UR 5/8 Sheetrock firecoDeC 2x4 57sqin Min.2-3/4normalwt.concretetopping 3HR-UBR (24%) onMin.10J2joistsandW8x24beams

G531 2HR-R&UR 1/2 SheetrockfirecoDeC 1x1 144sq.in. Min.3-1/4normalwt.concrete 2HR-UBR (1%) Min.6D500steeljoist

1HR-R&UR 5/8 SheetrockfirecoDe 1x1 144sq.in. Min.2-1/2normalwt.concrete (1%) Min.6D500orD510steeljoist

G541 1HR-R&UR 5/8 SheetrockfirecoDeC 2x4 113sq.in. Min.3-1/2normalwt.concrete (24%) Min.7-3/16-deep,18-ga. steelC-joists

G546 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Min.2normalltwt.concrete 1HR-UBR light-gaugesteeltruss

G547 2HR-R&UR 1/2 SheetrockfirecoDeC 2x4 114sq.in. Min.2-1/2normalwt.concrete (24%) Min.8J2or10K1steeljoists

3HR-R&UR 5/8 SheetrockfirecoDeC 2x4 114sq.in. Min.3normalwt.concrete 3HR-UBR (24%) Min.8J2or10K1steeljoists

G551 1HR-UR 5/8 SheetrockfirecoDeC N/A N/A 1Levelrock,steeldeck,9-1/4-deepsteel oneor [email protected].,3-1/2insulation, twolayers [email protected].

PrecastConcreteFloors J502 2HR-U&UR 5/8 Sheetrock firecoDeC NA NA Min.2normalwt.concreteslab 3HR-R&UR 5/8 Sheetrock firecoDeC NA NA Min.2-3/4normalwt.concreteslab

WoodJoists L211 2HR-UR 1/2 Sheetrock firecoDeC 1x4(12%) 576sq.in.. T&Gorplywood(see6alternatives)over 75minfinishrating 2x2(16%) subflooron2x10joists@16oc,plus 2x4(24%) P237-ceilingconst. 20x48(20%)

L502 1HR-UR 1/2 Sheetrock firecoDeC N/A N/A T&Gorplywood(see14alternatives) 22minfinishrating 2P-X2,1PC-AR,&WRC [email protected].

L508 1HR-UR 5/8 SheetrockfirecoDeC N/A N/A T&Gorplywoodon4x10or 29minfinishrating 1P-X1,2P-X2,2PC-AR,SCX, DBL2x10joists SYX,&WRX


Floor/Ceiling UL Assembly Board WallboardCore FixtureSize Max. AssemblyConstruction Design Rating* Thick. Type (%ofFixtures) DuctArea Details No. per�00sf


WoodJoists L513 1HR-UR 5/8 Sheetrock firecoDeC N/A N/A 3/4T&Gw/adhesiveon2x10joists 28minfinishrating @24o.c.,drywallbattensatjoints (see15alternatives)

L515 1HR-UR 1/2 Sheetrock firecoDeC N/A N/A T&Goversubflooringon2x10 21minfinishrating 2P-X2,1PC-AR,&WRC [email protected].(see9alternatives)

L523 1HR-U 5/8 SheetrockfirecoDeC N/A 198sq.in. Finishfloorover5/8plywood 21-min. [email protected]. finishrating

L525 1HR-UR 1/2 Sheetrock firecoDeC 2x4 57sq.in. T&Gorplywoodoversubflooringon2x10 21minfinishrating or5/8 (24%) [email protected].(see12alternatives)

L526 1HR-UR 5/8 Sheetrock firecoDeC 2x4 114sq.in. T&Gorplywoodoveron2x10joists 22minfinishrating 1P-X2,1PC-AR,&WRC (24%) (see10alternatives)

Plywoodwith L521 1HR-U 5/8 SheetrockfirecoDeC N/A 324sq.in. FinishflooroverplywoodsubfloorWoodTruss 25-min. onmin.18-deepwoodtruss finishrating @24o.c.max.

L529 1HR-UR 5/8 Sheetrock firecoDeC 2x4 57sq.in. T&Gwoodfloororltwtinsulatingconcrete 22minfinishrating 1P-X2,2PC-AR (24%) oversubflooring(see16alternatives) [email protected]

L550 1HR-U 5/8 SheetrockfirecoDeC N/A 360sq.in. FinishflooroverT&Gplywood 23-min. subflooronmin.-18deepwood finishrating [email protected].

Plywoodwith L524 1HR-R&UR 1/2 SheetrockfirecoDeC N/A N/A FinishflooroverplywoodSteelC-Joistsor two subflooronmin.7-deepLight-Gauge layers steelC-joistSteelTruss L548 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A 7/8T&Gplywoodonmin. two 11-3/8-deep,16-ga.steel layers [email protected].

L549 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Finishfloorover23/32plywood onlight-gaugesteeltrusses @48o.c.max.






L563 1HR-UR 5/8 SheetrockfirecoDeC N/A 256sq.in. Woodfloor;2x4open-web [email protected].

L569 1HR-UR 5/8 SheetrockfirecoDeC N/A N/A Woodfloor;2x10woodjoists @16or24o.c. whenbattens(item7)areused.

L570 1HR-UR 1/2 SheetrockfirecoDeC N/A N/A Woodfloor,9-1/2-deepwoodI-joists @19.2o.c..

*R=restrainedrating UR=unrestrainedrating UBR=unrestrainedbeamrating




DoubleCeiling P237 2-HR-R&UR 1/2 Sheetrock firecoDeC 1x4(12%), 576sq.in. Roofsystemonsteelroofdeck,min.fiberRoofAssemblies 2-HR-UBR 2x2(16%), [email protected] 2x4(24%), 20x48(20%)

P239 1-1/2HR-R&UR 1/2 Sheetrock firecoDeC 1x4(12%), 576sq.in. Roofcoveringofgypsumconcreteover 1-1/2HR-UBR 2x2(16%), USG�formboard,subpurlinsand12J3joists 2x4(24%), w/w6x16beam. 20x48(20%)

P241 2HR-R&UR 1/2 Sheetrock firecoDeC 1x4(12%), 576sq.in. Roofcoveringoveroverinsulatingconcrete 2x2(16%), onsteelroofdeckand10J3minjoists@ 2x4(24%), 48o.c. 20x48(20%)

MineralandFiber P501 1and2HR-R&UR 5/8 Sheetrock firecoDeC N/A N/A Roofcoveringovermineralandfiberboard BoardonBuildingUnits 2P-X2&2PC-AR onbuildingorprecastconcreteunits,14J5 orPrecastConcrete [email protected].

GypsumPlank, P506 1-1/2HR-R&UR 5/8 Sheetrock firecoDeC 2x4 57sqin Roofcoveringovermin&fiberboards.on InsulationBoard (24%) gypsumplanks,subpurlinsand12H5 [email protected].

P508 1HR-R&UR 5/8 Sheetrock firecoDeC 2x4 144sqin Roofcoveringovermin&fiberboards(seealt) 2P-X2,1PC-AR,&WRC (24%) gypwallboard.,steelroofdeck,10J4joists (min)@48o.c.

Insulating P507 1-1/2HR-R 5/8 Sheetrock firecoDeC 2x4 57sqin Roofcoveringonfoamedplasticinsulation, Concrete 1HR-UR (24%) Gypsumconcandformboards.onsubpurlins and10J4joists(min)@4o.c.

P509 1HR-R&UR 5/8 Sheetrock firecoDeC` 2x4 144sqin Roofcoveringonfoamedplasticinsulation, 1HR-R (24%) Gypsumconc.andformboards.onsubpurlins and10J4joists(min)@4o.c.

CorrugatedSteelDeck P510 1&1-1/2HR-R 1/2& Sheetrock firecoDeC 2x4 57sqin Roofcoveringoverinsulation(seealt)w/InsulatedBoardor &UR 5/8 (24%) ongypsumwallboardsteelroofdeck, FoamPlasticInsulation 10J4joists(min)@72o.c.max.

P513 1-1/2HR-R&UR 5/8 Sheetrock firecoDeC 2x4 144sqin Roofcoveringoninsulatingconcreteand (24%) foamedplasticovercorrugatedsteeldeck, [email protected].

P514 2HR-R&UR 5/8 Sheetrock firecoDeC 2x4 255sqin Roofcoveringoverinsulation(see9 (24%) alternatives),gyp.wallboardandsteeldeck,

[email protected].

P516 1HR-UR 5/8 Sheetrock firecoDeC NA NA MetalroofdeckpanelsonMin.8deep (2layers) C-or-Z-shapedpurlins@60max,glassfiber

insulationbetweenroofdeckpanelsandsteelroofpurlins,W-shapedbeam

P518 1HR-R&UR 1/2 SheetrockfirecoDeC N/A N/A Roofcoveringoversteeldeckonmin. 1HR-UB two min.8-deep,18-ga.steelC-joists layers @24o.c.max.

EngineeredSteel P515 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A RoofcoveringovermineralandfiberboardOrWood two onsteelroofdeckoversteelrooftrussesRoofTruss layers @48o.c.max.

P521 2HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofcoveringoverfoamedplasticinsulation, two gypsumwallboard,steeldeckonlight-gauge layers [email protected].

P522 1HR-UR 5/8 SheetrockfirecoDeC N/A 196sq.in. Roofsystemover15/32plywoodonwood [email protected][email protected].

P523 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofsystemover23/32plywoodon [email protected].

Fire-Rated Assemblies by UL DesignsFlat Drywall Suspension Ceilings



8"max. 8"max.maintee

crossteedrywallbuttjoint


extracrossteerequiredforfirerating

EngineeredSteel P525 2HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A RoofmembraneormetalroofdeckonOrWood two foamedplasticinsulation,Durock®BrandRoofTruss layers CementBoardorgypsumwallboardover

corrugatedsteeldeckonlight-gaugesteel [email protected].

P526 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofsystemover23/32plywoodorsteel roofdeckonlight-gaugesteeltrusses @48o.c.max.

P527 1-1/2HR- 5/8 SheetrockfirecoDeC N/A N/A Roofcoveringormetalroofdeckon R&UR foamedplasticinsulation,Durock®Brand

CementBoardorgypsumwallboardovercorrugatedsteeldeckonlight-gaugesteel

[email protected].


P529 1-1/2HR- 5/8 SheetrockfirecoDeC N/A N/A Roofcoveringormetalroofdeckon R&UR foamedplasticinsulation,Durock®Brand

CementBoardorgypsumwallboardovercorrugatedsteeldeckonlight-gaugesteel

[email protected].


P531 1HR-UR 5/8 SheetrockfirecoDeC N/A 360sq.in. Roofsystemover15/32plywoodonwood [email protected].


P535 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofcoveringormetalroofdeckover mineralandfiberboardorfoamedplastic

insulation,Durock®BrandCementBoardorgypsumwallboardoverlight-gaugesteeltrusses@48o.c.max.

P536 2HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofcoveringormetalroofdeckon two foamedplasticinsulation, layers Durock®BrandCementBoardorgypsumwall-

[email protected].

P537 1HR-R&UR 5/8 SheetrockfirecoDeC N/A N/A Roofsystemover23/32plywwodorsteel roofdeckonlight-gaugesteeltrusses @48o.c.max.

Fire-RatedButtJoint Fire-ratedceilingsrequireextracrossteesspaced8orlessoneithersideofthebuttjoint.Fire-ratedassembliesrequireaCross-TeeSpacing hangerwireinstalledadjacenttofirereliefnotch.



Note:OnlySheetrock®brandexteriorceilingboard,fiberock®brandaQua-tough™sheathingandDurock®cementboardaresuitableforexteriorapplications.PleasecontactUSGTechnicalServiceformoreinformation.

Belowisachartindicatingthecomponentsandtheirspacing,whicharenecessarytoachievethedifferentULupliftclassifications.ContactTechnicalServiceforspecificinformationoncompressionposts,limitingple-numdepths,andconstructiondetailsforyourinstallation.

Designwindloadsvarywithgeographicregionandbuildingconditions,andmustbeestablishedbyaprofessionalengineerorarchitectofrecord.

FlatDrywallCeiling

Exterior Application Wind Load Data

Recommended Uplift Panel “A” MainTee “B” “C” “D”ComponentSpacing Load Type Max.MainTee Max.Cross Max.Hanger Max.Compression Spacing MemberSpacing WireSpacing PostSpacing 5 1/2or5/8exteriorpanels 48 DGL-26,DGLW-26 24 48 60

10 1/2or5/8exteriorpanels 48 DGL-26,DGLW-26 24 48 42


20 5/8exteriorpanels 48 DGL-26,DGLW-26 16 48 24








60 doublelayer5/8exteriorpanels 24 DGLW-26 24 48 42







90 5/8exteriorpanels&plywood 24 DGLW-26 16 48 24

TheUSGdrywallsuspensionsystemhasbeentestedinaccordancewithUnderwritersLaboratoriesUL580,TestsforUpliftResistanceofRoofAssembliesforuseinexteriorsoffitsandcanopies.Seeillustrationbelow.USGhas23differentgridandwindloadcombinations(themostintheindustry)toaccommodateyourdesignparameters.PleaserefertoRoofingMaterialsandSystemsDirectory,ConstructionNo.526andNo.526A-F,forexactconstructionparameters.


FlatCeilings Exemptions Flatceilingsconstructedoflathandplasterorgypsumboard,screw-ornail-attachedtosuspensionmembersthatsupportaceilingononelevelextendingfromwalltowall,aregenerallyexemptfromseismicconstructionrequirements.Forexample,seeCISCARecommendationsforDirect-HungAcousticalTileandLay-InPanelCeilings,SeismicZones0-2(SeismicDesignCategoryC),orGuidelinesforSeismicRestraintforDirect-HungSuspendedCeilingAssemblies,SeismicZones3-4(SeismicDesignCategoriesD,E,andF.)

SeismicApplications Flatdrywallextendingfromwalltowallisexemptfromseismicceilingrequirements.However,foraddedsafety,USGofferstheACM7seismicclip,designedtosecureDGW26smainteestowallmolding,preventingmove-mentoftheceilingassemblyduringaseismicevent.Withasaddlethatfastenssecurelyovertheteebulb,andtwotowwingsthatconnecttothewallmoldingoneachsideofthetee,theACM7clipisdesignedtoprovideamorerobustholdthantraditionalL-shapedseismicclipsbyothermanufacturers.

ACM7SeismicWallClip ACM7toWallMolding

Curved CodeApprovals Formulti-levelceilingsorbulkheads,contactTechnicalService.Ceilings 1 Areasusingcurvedmainteeswithradii7orlargershoulduseseismicsplaywiresandcompressionposts

12o.c.similartotheCISCAGuidelinesforSeismicRestraintforDirect-HungSuspendedCeilingAssemblies,SeismicZones3-4.Seetheillustrationbelowfordetails.

2 Areasusingcurvedmainteeswithradiismallerthan7requirebridgingmembers,suchasDonnDXWmaintees,whichspanacrossthecurveddrywallmaintees.Thesebridgingteesarescrewfastenedto“hard”pointsinthecurveddrywallceiling,suchasthetopsofvaults.Seismicsplaywiresandcompressionpostsarethenfastenedtothebridgingmembers.Ifyouhaveanyquestions,contactTechnicalService.

Seismicrestraintisusuallyaccomplishedwithasetoffour“splay”wiresandacompressionpost.Thewiresrunparalleltothemainteesandcrossteesatanangleoflessthan,orequalto,45°tothehorizontal.Thecompressionpostisinstalledatthejunctionofthefour“splay”wires.Thispostmustbestrongenoughtoresistanyupliftforcesgeneratedduringanearthquake.Thetypeofpostneededalsovarieswiththedepthoftheplenum.Compressionpostsmustbeapprovedbytheprojectengineerorthearchitectofrecordtoensuretheywillresisttheupliftforces.CallTechnicalServicefordetails.Seismicrestraintsmustbeinstalledataminimumdistanceof12o.c.

InteriorCeiling

Seismic Requirements

compressionpost

hangerwire12ga.splayedbracewires

crosstee

maintee

DGW26 wall to wallmain tee

DGWM24 wall molding

ACM7 seismic clip


CrossTees DGLW224 DGLW2624 DGL224 DGL324 DG824

DGL424

DGLW424

DGLW50 SpeciallydesignedforframingTypeFlightfixtures,thesecrossteesrequirenofield-cuttingandprovidemoreoptionsforfixtureplacement,includingcenteredbetweenmaintees.

StraightMain DGLW26MainTees

DGL26

DGW26S Wall-to-WallSystem

24",26",36" 96"24" 24"24" 24"

48"24"24"

13/4" 13/4" 13/4" 13/4" 13/4" 13/4"

12'-0"

8"o.c. 8"o.c.4" 4"

CL

25/8" 25/8"33/8" 33/8"51/8" 51/8"13/4"

7/8" 7/8"

481/2"

241/4"

13/4"

7/8”

13/4"13/4"41/4" 41/4"

501/4"

6" 6"

251/8"CL

Component Hole PunchingFlat Drywall Ceilings

12'-0"8"o.c. 8"o.c.4" 4"

custom lengths9/16"9/32"

1/2" 5/32"


Curved ValleysMainTees

Vaults

Note:Lengthdependsonradius.Seechartonpage5.

4" 4"8"

8"8"

8"8"8"8"8"

8"8"

8"

6',8',10'

4" 4"8"

8"8"

8" 8" 8" 8"8"

8"8"

8"6',8',10',12'



�:General �.0� A. Relatedworkspecifiedelsewhere: RelatedWork �. GypsumBoard:Section________

2. AirHandling:Section_________3. Lighting:Section_______4. Acoustical:Section_________

B. Workinstalledbutfurnishedunderothersections:C. Workinstalledbutfurnishedunderothersections:

�.02 A. Apre-engineereddrywallsuspensionsystemconsistingofstraightmainteesalongwithstraightfurringcrossSystemDescription channelsorcrosstees,thatjointogethertosupportscrew-attachedgypsumpanels,independentlysup-

portedlightfixtures,andairdiffusers,whereapplicable.Whereapplicable,installedsystemsmustconformtoUnderwritersLaboratories,Inc.(UL)FireResistanceDesignNo.andotherapplicablecodes.

�.03 A. Subcontractorqualification:Installershallhavesuccessfulexperienceinstallingsuspensionanddrywallsystems.QualityAssurance B. Requirementsofregulatoryagencies:Codesandregulationsofauthoritieshavingjurisdiction.

C. Sourcequalitycontrol:Manufacturerwillprovidetestcertificationforsuspensionsystemsasrequiredtomeetperformancestandardsspecifiedbyvariousagencies.

�.04 A. ASTMC635,StandardSpecificationsforMetalSuspensionSystems.References B. ASTMC636,RecommendedPracticeforInstallationofMetalSuspensionSystems. C. ASTMA653,StandardSpecificationforSteelSheet,Zinc-Coated(Galvanized)orZinc-IronAlloy-Coated

(Galvannealed)bytheHot-DipProcess.D. CISCACeilingSystemsInstallationHandbook.E. GA216,Installation&FinishofGypsumPanels.

F. ASTMC645,StandardSpecificationforNon-StructuralSteelFramingMembers. G. ASTMC754,SpecificationforInstallationofSteelFramingMemberstoReceiveScrew-AttachGypsumBoards. H. ASTMC843,SpecificationofApplicationofGypsumVeneerPlaster. I. ASTMC844,SpecificationofApplicationofGypsumBasetoReceiveVeneerPlaster. J. ASTME119,StandardTestMethodsforFireTestsofBuildingConstructionandMaterials. K. UnderwritersLaboratoriesInc.(UL)FireResistanceDirectory. L. ASTME580,StandardPracticeforApplicationofCeilingSuspensionSystemsforAcousticalTileandLay-in

PanelsinAreasRequiringSeismicRestraint. M. CISCARecommendationsforDirect-HungAcousticalTileandLay-InPanelCeilings,SeismicZones0-2. N. CISCAGuidelinesforSeismicRestraintforDirect-HungSuspendedCeilingAssemblies,SeismicZones3-4. O. ASTMC1396,StandardSpecificationforGypsumWallboard. P. ASTMC1002,StandardSpecificationforSteelSelf-PiercingTappingScrewsfortheApplicationofGypsum

PanelProductsorMetalPlasterBasestoWoodStudsorSteelStuds.

�.05 A. Samples:Submitactualsamplesandtechnicaldataforsuspensionsystemmainteesandcrossteesforreview.Submittal B. ShopDrawings:

�. Reflectedceilingplans:Submitceilingsuspensionsystemlayoutindicatingdimensions,lightingfixturelocations,andrelatedmechanicalcomponents.

2. Assemblydrawings:Indicateinstallationdetails,accessoryattachmentsandinstallationofrelatedlightingfixturesandrelatedmechanicalsystemcomponents.

C. Manufacturer’sData:�. Systemdetails:Submitmanufacturer’scataloguecutsorstandarddrawingshowingdetailsofsystemwith

projectconditionsclearlyidentifiedandmanufacturer’srecommendedinstallationinstructions.

Application Guide SpecificationsFlat Drywall CeilingsFlat Drywall Ceilings


�.06 A. Deliveryofmaterials:Delivermaterialsinoriginal,unopenedpackagesclearlylabeledwithamanufacturer’sDelivery,Storage name,itemdescription,partnumber,typeandclassasapplicable.andHandling

B. Inspection:Promptlyinspectdeliveredmaterials,filefreightclaimsfordamageduringshipment,andorderreplacementofmaterialsasrequired.Anydamagedmaterialsshallbepromptlyremovedfromthejobsite.

C. Storage:Storeinamannerthatwillpreventwarpage,waterdamage,ordamageofanykind.Preventinterfer-enceto/byothertradesandanyotheradversejobconditionsduetostoragelocationsormethods.Warning:StoreallSheetrockBrandGypsumPanelsflat.Panelsareheavyandcanfallover,causingseriousinjuryordeath.Donotmoveunlessauthorized.

D. Handling:Handleinsuchamannertoinsureagainstracking,distortionorphysicaldamageofanykind.

�.07 A. Existingconditions:(includespecificalterationworkrequirementsfortheproject). Project B. Environmentalrequirements:

Conditions �. BuildingConditions:Buildingshallbeenclosedwithallwindowsandexteriordoorsinplaceandglazed,and

roofwatertightbeforeinstallationofsuspensionsystem.2. Interiortemperature/humidityinbuilding:Climacticconditionsinareastoreceivedrywallsuspensionsystems

shallrangefrom60°F(16°C)to104°F(40°C)andrelativehumidityofnotmorethan90%shallbemain-tainedbeforeinstallationofcomponents.

3. Incoldweatherduringgypsumpanelinstallationandjointfinishingandveneerplasterapplication,temperatureswithinthebuildingshallbemaintainedintherangeof55-70°F(13-21°C).Heatandventilationshouldbeevenlyprovidedtofacilitatecuringanddrying.

C. Coordinationwithotherwork:�. General:Coordinatewithotherworksupportedbyorpenetratingthroughtheceiling,includingmechanicaland

electricalworkandpartitionsystems.2. Mechanicalwork:Ductworkabovesystemshallbecomplete,andpermanentHVACsystemsoperating.3. ElectricalWork:Installationofconduitabovesuspensionsystemshallbecompletebeforeinstallationofsuspen-

sionsystem.D. Protection:

�. Personnel:Followgoodsafetyandindustrialhygienepracticesduringhandlingandinstallingofallproductsandsystems,withpersonneltotakenecessaryprecautionsandwearappropriatepersonalprotectiveequipmentasneeded.Readmaterialsafetydatasheetsandrelatedliteratureforimportantinformationonproductsbeforeinstallation.Contractortobesolelyresponsibleforallpersonalsafetyissuesduringandsubsequenttoinstallation.Architect,specifier,ownerandmanufacturerwillrelyoncontractor’sperformanceinsuchregard.

2:Products 2.0� A. USGdrywallsuspensionsystem. Manufacturer B. USGSheetrockbrandgypsumproducts,panelsandaccessories(regular,firecoDe, firecoDeC).SeeGypsum

Products: Panels and Accessories(SA927)forspecifications. C. USGSheetrockbrandjointtape,jointcompounds,trim,andaccessories.SeeSheetrock BrandInterior Finishing

Products (J1424)forspecifications. D. USGimperialbrandgypsumbase.SeePlasterSystems(SA920)forspecification.AllmanufacturedbyUSG,

Chicago,ILUSA.ManufacturedinaccordancewithASTMC588,StandardSpecificationforGypsumBaseforVeneerPlasters.

E. USGfiberockbrandaQua-toughinteriorpanels.SeeMoisture-Resistant Assemblies(SA934)forspecifications. F. USGDurockbrandcementboard.SeeMoisture-Resistant Assemblies(SA934)forspecifications.


2.02 A. Commercial-quality,cold-rolledsteel,hot-dippedgalvanizedfinish.Materials B. USGFlatDrywallSuspensionsSystems:

�. MainTees:Fire-RatedHeavyDutyclassification,144long,withintegralreversiblesplicewithknurledface.DGLW261-1/2Face,1.617highor

DGL2615/16Face,1-1/2high2. CrossMembers:Fire-Ratedmemberswithknurledface.

CrossTees:DGLW424crosstee1-1/2highx48longwith1-1/2wideface.Teesmusthavequickreleasecrossteeendstoprovidepositivelockingandremovabilitywithouttheneedfortools.orFurringChannel:DGCL-4furringchannel7/8highx48longwith1-1/2face.

3. AccessoryCrossTees:Crossteesmusthaveknurledfaces.Crossteeshavequickreleasecrossteeendstoprovidepositivelockingandremovabilitywithouttheneedfortools.DGL224Fire-Rated 1-1/2highx24longwith15/16faceDGL424Fire-Rated 1-1/2highx48longwith15/16faceDGLW224Fire-Rated 1-1/2highx24longwith1-1/2faceDGLW424Fire-Rated 1-1/2highx48longwith1-1/2face

4. Wallmoldings:Singlewebwithknurledface.DGWM24 1x1-1/2x144longwallmolding.DGCM27 144x1-5/8x1channelmolding.

C. Accessories�. TransitionclipDGTC-902. SpliceclipDGSC-180

3.WallattachmentclipDGWC 4.SpliceplateDGSP 5. DomehubDGHUB 6. compaSSodrywallclipDGC4,DGC6,DGC8

D. USGcompäSSotrim�. 4compäSSotrim:4wideface,9/16horizontallegswithhemsformedforattachmenttothecompäSSo

mountingclip,commercial-qualitycold-rolled24-gaugesteelwithfactoryfinish.2. 6compäSSotrim:6wideface,9/16horizontallegswithhemsformedforattachmenttothecompäSSo

mountingclip,commercial-qualitycold-rolled24-gaugesteelwithfactoryfinish. 3. 8compäSSotrim:8wideface,9/16horizontallegswithhemsformedforattachmenttothecompäSSo

mountingclip,commercial-qualitycold-rolled24-gaugesteelwithfactoryfinish. 4.10compäSSotrim:10wideface,9/16horizontallegswithhemsformedforattachmenttothecompäSSo

mountingclip;commercial-qualitycold-rolled24-gaugesteelwithfactoryfinish. 5. 12compäSSotrim:12wideface,9/16horizontallegswithhemsformedforattachmenttothecompäSSo

mountingclip;commercial-qualitycold-rolled24-gaugesteelwithfactoryfinish.E. Gypsumpanels �. GypsumpanelsmanufacturedinaccordancewithASTMC36. 2. 1/4,3/8,1/2,5/8,and3/4Sheetrockbrandgypsumpanels(Regular,firecoDe, firecoDeC)and1/2

Sheetrock brandinteriorgypsumceilingboard.(seeUSGDrywall–SteelFramedSystemsSpecifications—SA92309250-USG-3).

F. USGSheetrockbranddrywallaccessories;trims,expansionjoints,sealants,jointcompoundmaterials.(seeUSGGypsumPanels&AccessoriesSpecificationsSA92709250.

G. fiberockbrandabuse-resistantpanels,Durockbrandcementboard,andimperialbrandabuse-resistantgypsumbase.

Application Guide SpecificationsFlat Drywall Ceilings


2.03 A. CornerReinforcement:Minimum#26gauge,zincalloywithorwithoutpaperflangesorplasticbead.Metal,Paperor B. CasingReinforcement:Minimum#24gauge,zincalloyorplasticwithexpandedflanges.PlasticTrim

C. ControlJoints:Minimum#26gauge,zincalloy.093,extrudedaluminumorplasticwithexpandedflanges.

2.04 A. ConventionalGypsumPanelfasteners(ASTMC1002).No.6Type-S,HiLobuglehead,self-drilling,self-tappingFasteners steelscrews.

3:Execution 3.0� A. Examineareastoreceivematerialsforconditionswhichwilladverselyaffectinstallation.Providewrittenreport Inspection ofunacceptablesurface. B. Donotstartworkuntilunsatisfactoryconditionsarecorrected. C. Worktobeconcealed:Verifyworkaboveceilingsuspensionsystemiscompleteandinstalledinmannerwhich

willnotaffectlayoutandinstallationofsuspensionsystemcomponents. D. Beginningofinstallationshallsignifyacceptanceofconditionsinareastoreceiveceilingsuspensionsystem. F. Fire-ratingrequirements:Constructionabovefire-ratedassemblyshallmeetrequirementsasapplicabletopro-

videfire-resistanceratingspecifiedinPart2-Products.

3.02 A. Fielddimensionsmustbeverifiedpriortoinstallation. Preparation

3.03 A. Standardreference:InstallinaccordancewithASTMC636,CISCAinstallationstandards,andotherapplicableInstallation codereferences.

B. Manufacturer’sreference:Installinaccordancewithmanufacturer’scurrentprintedrecommendations.C. Drawingreference:Installinaccordancewithapprovedshopdrawingsandlocateceilinginaccordancewith

mainteedimensionsrelativetoelevations.D. Componentandhangerwireinstallation:

FlatCeilings:Mainteesshallbespacedamaximumof48oncenterandsupportedbyhangerwiresspacedamaximum48oncenterandasspecifiedbyULFireResistanceDirectoryattachinghangerwiresdirectlytostructureabove.Crossteesshallbespacedpermanufacturers’recommendationsandasspecifiedbyULFireResistanceDirectory.Transitions:ChangesinElevationinSoffitandFasciaCeilingApplications.Whenconstructingsteppedsoffits,bracingofthedrywallsuspensionsystemand/oradditionalhangerwiresmaybenecessarytoensurestabilityandstructuralperformanceduringandafterdrywallattachment.Themaximumverticalsoffitheightis48.(Maximumunsupporteddrywallareashallnotexceed48x24).Intermediatecrossteesarenotnecessarywhensoffitdimensionsdonotexceed24.Crossteespacinginhorizontalsoffitplaneisnottoexceed24.Intermediatecrossteesmaybenecessarytomaintainvisuallyacceptabledrywallplanesanddrywallcorners.

Generalhangerwirenotes:Hangerwiresarerequiredwithin12onbothsidesofapivotedspliceclip. Atleast1hangerwireisrequiredwithin12ofatransitionclip. Limitations:Donotsupportwiresfrommechanicaland/orelectricalequipmentoccurringaboveceiling. E. Accessories:Installaccessoriesasapplicabletomeetprojectrequirements.


Application Guide Specifications

3.04 A. Applygypsumpanelsfirsttoceilingandthentowalls.PositionallendsandedgesofgypsumpanelsatframingGypsumPanel members.Extendceilingboardtocornersandmakefirmcontactwiththewallangle,channelortopplate.ToInstallation

minimizeendjoints,usepanelsofmaximumpracticallengths.Fitendsandedgesclosely,butnotforcedtogether. B. Cutends,edges,scribeormakecutoutswithinthefieldofpanelsinaworkmanlikemanner.Cutgypsumboard

tosizeusingaknifeandstraightedge. C. Attachgypsumpanelstothesuspensionsystemmainrunners,crossteesandcrosschannelswithconventional

gypsumpanelfasteners(No.6TypeSHiLobuglehead,self-drilling,self-tappingsteelscrews)spaced8o.c.atperipheryofgypsumpanelsandlocated3/8infrompaneledgesandspaced12o.c.inthefield.Drivefastenersinfieldofpanelsfirst,workingtowardendsandedges.Holdpanelsinfirmcontactwithframingwhiledrivingfasteners.Drivefastenerheadsslightlybelowsurfaceofgypsumpanelswithoutbreakingfacepaper.(SeeGypsumPanelandAccessoriesSpecificationSA92709250).Installtrimatallinternalandexternalanglesformedbytheintersectionofpanelsurfacesorotherdissimilarmaterials.Applycornerreinforcementtoallverticalorhorizontalexternalcornersinaccordancewithmanufacturer’sdirections.

Ceilingsnote:SeeDrywall–SteelFramedSystemsSpecificationsSA92309250USG-3. Spacingofdrywallgridisdesignedtosupportonlythedeadload.Heavyconcentratedloadsshouldbeinde-

pendentlysupported.Lightingfixturesortroffers,airventsandotherequipmentshouldbeseparatelysupportedfromthestructure;gypsumpanelswillnotsupporttheseitems.

Topreventobjectionablesaginnewgypsumpanelceilings,theweightofoverlaidunsupportedinsulationshouldnotexceed1.3psffor1/2thickgypsumpanelswithspacingof24o.c.;2.2psffor1/2thickgypsumpanels16o.c.framingand1/2Sheetrockbrandinteriorgypsumceilingpanelson24o.c.framingand5/8panels24o.c.;3/8thickgypsumpanelsmustnotbeoverlaidwithunsupportedinsulation.Avaporretardershouldbeinstalledinexteriorceilings,andplenumoratticspacesshouldbeproperlyvented.

Duringperiodsofcoldordampweatherwhenapolyethylenevaporretarderisinstalledonceilingsbehindthegypsumpanelsitisimportanttoinstalltheceilinginsulationbeforeorimmediatelyafterinstallingthegypsumpanels.Failuretofollowthisproceduremayresultinmoisturecondensationinthebackofthegypsumpanelscausingsag.

E. Spray-TexturedCeilings:Wherewater-basedtexturingmaterialsoranyslow-dryingsurfacetreatmentareusedoversingle-layerpanels,maximumframespacingis16o.c.for1/2panelsappliedperpendiculartoframing.

3.05 A. ProvideaseparationinthesuspensionsystematexpansionjointsasshownonthedrawingsandcarrytheExpansionJoints jointthroughthegypsumpanels.Expansionjointsareinstalledtoseparatethesuspensionsystemandallow

formovementinlargeceilingareas.

3.06 A. ProvidecontroljointNo..093whichhasa3/32groundfordrywallandveneerplaster.Ceilingareasshouldnotexceed2,500sq.ft.withperimeterreliefor900sq.ft.withoutperimeterrelief.



Notetospecifier:ThefollowingspecificationforUSGCeilingSuspensionproductsandplasterproductsisaguideforspecifyingaplastereddomecomprisedofafinishedcurvedsurfacehavingsingleradiusofcurvature.Deletesuchitemsthatarenotrelatedtotheparticularproject.Whereblankspacesareprovided,insertinformationpertinenttotheprojectforwhichthespecificationisprepared.

�:General �.0� Specifyareastoreceivethesesystems. Scope

�.02 Relatedworkspecifiedelsewhere: RelatedWork �. AirHandling:Section______________ 2. Lighting:Section__________________ 3. Acoustical:Section________________

�.03 Apre-engineereddrywallsuspensionsystemconsistingofcurvedsuspensiongridthatjointogethertosupport SystemDescription screwattachedmetallath,withanapplicationofhighstrengthconventionalplaster,formingcurveddomes.

�.04 A. Subcontractorqualification:Installershallhavesuccessfulexperienceinstallingsuspensionandplastersystems. QualityAssurance B. Requirementsofregulatoryagencies:Codesandregulationsofauthoritieshavingjurisdiction. C. Sourcequalitycontrol:Manufacturerwillprovidetestcertificationforsuspensionsystemsasrequiredtomeet

applicableindustrystandardsand/orstandardsspecifiedbyvariousagencies.

�.05 A. ASTMC636,RecommendedPracticeforInstallationofMetalSuspensionSystems. References B. CISCACeilingSystemsInstallationHandbook C. ASTMC28,SpecificationforGypsumPlasters D. ASTMC847,SpecificationforMetalLath E. ASTMC841,SpecificationforInstallationofInteriorLathing&Furring F. ASTMC842,SpecificationforApplicationofInteriorGypsumPlaster

�.06 A. ShopDrawings: Submittals �. Reflectedceilingplans:Submitceilingsuspensionsystemlayoutindicatingdimensions,hangerwires,lighting

fixturelocations,andrelatedmechanicalcomponents. 2. Assemblydrawings:Indicateinstallationdetails,accessoryattachmentsandinstallationofrelatedlighting

fixturesandrelatedmechanicalsystemcomponents. B. Manufacturer’sData: �. SystemDetails:Submitmanufacturer’scataloguecutsorstandarddrawingshowingdetailsofsystemwith

projectconditionsclearlyidentifiedandmanufacturer’srecommendedinstallationinstructions.

�.07 A. DeliveryofMaterials:Delivermaterialsinoriginal,unopenedpackagesclearlylabeledwithamanufacturer’s Delivery,Storage name,itemdescription,partnumber,andtypeclassasapplicable.

andHandling B. Inspection:Promptlyinspectdeliveredmaterials,filefreightclaimsfordamageduringshipment,andorder

replacementmaterialsasrequired.Anydamagedmaterialsshallbepromptlyremovedfromthejobsite. C. Storage:Storeinamannerthatwillpreventwaterdamageordamageofanykind.Preventinterferenceto/by

othertradesandanyotheradversejobconditionsduetostoragelocationsormethods.Warning:StoreallSheetrockbrandgypsumpanelsflat.Panelsareheavyandcanfallover,causingseriousinjuryordeath.Donotmoveunlessauthorized.


Domes



�.08 A. EnvironmentalRequirements: Project �. BuildingConditions:Buildingshallbeenclosedwithallwidowsandexteriordoorsinplaceandglazedand

Conditions roofwatertightbeforeinstallationofsuspensionsystemandplaster.

2. Temperatureswithinthebuildingshallbemaintainedintherangeof55-70°F(13-21°C).Heatandventilationshallbeevenlyprovidedtofacilitatedrying.

B. CoordinationwithOtherWork: �. General:Coordinatewithotherworksupportedbyorpenetratingthroughthedome,includingmechanical

andelectricalwork. 2. Mechanicalwork:DuctworkabovesystemshallbecompleteandpermanentHVACsystemsoperating. 3. Electricalwork:Installationofconduitabovesuspensionsystemshallbecompletebeforeinstallationof

suspensionsystem C. Protection:Followgoodsafetyandindustrialhygienepracticesduringhandlingandinstallingofallproducts

andsystems,withpersonneltotakenecessaryprecautionsandwearappropriatepersonalprotectiveequip-mentasneeded.ReadMaterialSafetyDataSheetsandrelatedliteratureforimportantinformationonproductsbeforeinstallation.Contractortobesolelyresponsibleforallpersonalsafetyissuesduringandsubsequenttoinstallation;architect,specifier,ownerandmanufacturerwillrelyoncontractor’sperformanceinsuchregard.

2:Products 2.0� A. USGdrywallgridsuspensionsystem Materials B. Structo-baSe®gypsumplaster C. Structo-gauge®gaugingplaster D. reD top®finishplaster E. DiamonD®interiorfinishplaster AllmanufacturedbyUSG,Chicago,IL,USA,incompliancewithASTMStandards. F. Factory-curved,1-1/2x1-1/2USGdrywallgridwithknurledface—commercial-quality,cold-rolledsteel,

hot-dippedgalvanizedfinish.Crossteeholesspaced8o.c. Manufacturer’sdesignationDGW__VT__ G. Wire �. Hangerwire(12ga.)(8ga.),galvanized 2. Tiewire–18gauge,galvanized H. Metallath:3.4#/S.Y.self-furringdiamondmeshlath,galvanized I. Screws–Self-tappingtruss-headlathingscrews. J. Gypsumplaster:Structo-baSegypsumplaster K. Sand:ASTMC35 L. Water:Cleanandpotable M. Finishplaster:Tobedetermined N. Domehubandconnectingclips O. Casingandcornerbeadsasrequired P. Accessoriesasapplicabletoprojectrequirements

Domes



willnotaffectlayoutandinstallationofsuspensionsystemcomponents. D. Beginningofinstallationshallsignifyacceptanceofconditionsinareastoreceiveceilingsuspensionsystem. E. Fielddimensionsmustbeverifiedpriortoinstallation.

3.02 A. Standardreference:InstallgridmembersinaccordancewithASTMC636. Installation B. CISCAinstallationstandardsorotherapplicablecodeormanufacturers’references. C. Manufacturer’sreference:Installinaccordancewithmanufacturer’scurrentprintedrecommendations. D. Drawingreference:Installinaccordancewithapprovedshopdrawingsandlocateceilinginaccordancewith

mainteedimensionsrelativetoelevations. E. HangerWireInstallation:Hangerwiresarerequiredalongtheradialsuspensionmembers(spokes)spacedno

morethan32asmeasuredalongthearcofthemember.Additionalhangerwirestoupperstructuralelements.Donotsupporthangersfrommechanicaland/orelectricalequipment.

F. Spaceradialspokememberssoasnottoexceed48spacingatanypoint. G. Spacecrossteememberssothemaximumspanofmetallathis(16)(12). H. Securemetallathtoteememberswithscrewsspaced6o.c.max.,appliedatlathribs.Lapmetallathends

andedgesandsecurewith18gaugetiewirespaced6o.c. I. MixStructo-baSegypsumplasterwithsandinproportionsof2cu.ft.ofsandper100lbs.ofplasterfor

scratchandbrowncoats.Applyplastertometallathtoathicknessof5/8(min.)Measuredfromthefaceofthelath.

J. Selectaplastermixforthefinishcoattoprovideasmoothtrowelorsandfloat(Textured)finish.(ReferenceSA920)

K. Usetemplate(s)toinsureuniformandevencurvatureofthefinishedsurface



Notetospecifier:ThefollowingspecificationfortheUSGDrywallSuspensionSystemisaguideforspecifyingcurveddrywallceilings.Deletesuchitemsthatarenotrelatedtotheparticularproject.Whereblankspacesoccur,provideinformationtotheparticularprojectforwhichthespecificationisprepared.

�:General �.0� A. Relatedworkspecifiedelsewhere: RelatedWork �. GypsumBoard:Section________

2. AirHandling:Section_________3. Lighting:Section_______4. Acoustical:Section_________

B. Workinstalledbutfurnishedunderothersections:C. Workinstalledbutfurnishedunderothersections:

�.02 A. Apre-engineereddrywallsuspensionsystemconsistingofstraightandcurvedmainteesalongwithstraightSystemDescription furringcrosschannelsorcrosstees,thatjointogethertosupportscrewattachedgypsumpanelsandindepen-

dentlysupportedlightfixtures,andairdiffusers,whereapplicable.Whereapplicable,installedsystemsmustconformtoUnderwritersLaboratories,Inc.(UL)FireResistanceDesignNo.andotherapplicablecodes.

�.03 A. Subcontractorqualification:Installershallhavesuccessfulexperienceinstallingsuspensionanddrywallsystems.QualityAssurance B. Requirementsofregulatoryagencies:Codesandregulationsofauthoritieshavingjurisdiction.

C. Sourcequalitycontrol:Manufacturerwillprovidetestcertificationforsuspensionsystemsasrequiredtomeetperformancestandardsspecifiedbyvariousagencies.

�.04 A. ASTMC635,StandardSpecificationsforMetalSuspensionSystems.References B. ASTMC636,RecommendedPracticeforInstallationofMetalSuspensionSystems.

C. CISCACeilingSystemsInstallationHandbook. D. GA216,Installation&FinishofGypsumPanels. E. ASTMC645,StandardSpecificationforNon-StructuralSteelFramingMembers. F. ASTMC754,SpecificationforInstallationofSteelFramingMemberstoReceiveScrew-AttachGypsumBoards. G. ASTMC843,SpecificationofApplicationofGypsumVeneerPlaster. H. ASTMC844,SpecificationofApplicationofGypsumBasetoReceiveVeneerPlaster. I. ASTME119,StandardTestMethodsforFireTestsofBuildingConstructionandMaterials. J. UnderwritersLaboratoriesInc.(UL)FireResistanceDirectory.

�.05 A. Samples:Submitactualsamplesandtechnicaldataforsuspensionsystemmainteesandcrossteesforreview.Submittal B. Shopdrawings:

�. Reflectedceilingplans:Submitceilingsuspensionsystemlayoutindicatingdimensions,lightingfixturelocations,andrelatedmechanicalcomponents.

2. Assemblydrawings:Indicateinstallationdetails,accessoryattachmentsandinstallationofrelatedlightingfixturesandrelatedmechanicalsystemcomponents.

C. Manufacturer’sData: �. Systemdetails:Submitmanufacturer’scataloguecutsorstandarddrawingshowingdetailsofsystemwithproject

conditionsclearlyidentifiedandmanufacturer’srecommendedinstallationinstructions.



�.06 A. Deliveryofmaterials:Delivermaterialsinoriginal,unopenedpackagesclearlylabeledwithamanufacturer’sDelivery,Storage name,itemdescription,partnumber,typeandclassasapplicable.andHandling

B. Inspection:Promptlyinspectdeliveredmaterials,filefreightclaimsfordamageduringshipment,andorderreplacementofmaterialsasrequired.Anydamagedmaterialsshallbepromptlyremovedfromthejobsite.

C. Storage:Storeinamannerthatwillpreventwarpage,waterdamage,ordamageofanykind.Preventinterferenceto/byothertradesandanyotheradversejobconditionsduetostoragelocationsormethods.Warning:StoreallSheetrockbrandgypsumpanelsflat.Panelsareheavyandcanfallover,causingseriousinjuryordeath.Donotmoveunlessauthorized.


�.07 A. Existingconditions:(includespecificalterationworkrequirementsfortheproject). B. Environmentalrequirements: �. Buildingconditions:Buildingshallbeenclosedwithallwindowsandexteriordoorsinplaceandglazedandroof

watertightbeforeinstallationofsuspensionsystem. 2. Interiortemperature/humidityinbuilding:Climacticconditionsinareastoreceivedrywallsuspensionsystems

shallrangefrom60°F(16°C)to104°F(40°C)andrelativehumidityofnotmorethan90%shallbemaintainedbeforeinstallationofcomponents.

3. Incoldweatherduringgypsumpanelinstallationandjointfinishingandveneerplasterapplication,temperatureswithinthebuildingshallbemaintainedintherangeof55-70°F(13-21°C).Heatandventilationshouldbeevenlyprovidedtofacilitatecuringanddrying.

C. Coordinationwithotherwork: �. General:Coordinatewithotherworksupportedbyorpenetratingthroughtheceiling,includingmechanicaland

electricalworkandpartitionsystems. 2. Mechanicalwork:Ductworkabovesystemshallbecomplete,andpermanentHVACsystemsoperating. 3. Electricalwork:Installationofconduitabovesuspensionsystemshallbecompletebeforeinstallationofsuspen-

sionsystem. D. Protection: �. Personnel:Followgoodsafetyandindustrialhygienepracticesduringhandlingandinstallingofallproducts

andsystems,withpersonneltotakenecessaryprecautionsandwearappropriatepersonalprotectiveequip-mentasneeded.Readmaterialsafetydatasheetsandrelatedliteratureforimportantinformationonproductsbeforeinstallation.Contractortobesolelyresponsibleforallpersonalsafetyissuesduringandsubsequenttoinstallation;architect,specifier,ownerandmanufacturerwillrelyoncontractor’sperformanceinsuchregard.

2:Products 2.0� A. USGdrywallsuspensionsystem. Manufacturer B. USGSheetrockbrandgypsumpanels(Regular,firecoDe, firecoDeC)and1/2Sheetrockbrandinteriorgypsum

ceilingboard. C. USGSheetrockbrandjointtape,jointcompounds,trim,andaccessories(seeUSGGypsumPanelsand

AccessoriesSA927-09250Specification). D. USGimperialbrandgypsumbase(seeUSGPlasterSystemsSpecificationSA920-0920). AllmanufacturedbyUSG,Chicago,ILUSA.ManufacturedinaccordancewithASTMC635.


2.02 A. Commercial-quality,cold-rolledsteel,hot-dippedgalvanizedfinish.Materials B. USGflatdrywallsuspensionsystems:

�. Maintees:Fire-RatedHeavyDutyclassification1-1/2highx144long,integralreversiblesplicewithknurledface.DGLW261-1/2FaceDGL-2615/16Face

or DGL2615/16Face 2. Crossmembers:Fire-Ratedmemberswithknurledface. CrossTees:DGLW-424crosstee1-1/2highx48longwith1-1/2wideface.Teesmusthavequickrelease

crossteeendstoprovidepositivelockingandremovabilitywithouttheneedfortools. 3. Accessorycrosstees:Crossteesmusthaveknurledfaces.Crossteeshavequickreleasecrossteeendsto

providepositivelockingandremovabilitywithouttheneedfortools. DGL224Fire-Rated 1-1/2highx24longwith15/16face DGL424Fire-Rated 1-1/2highx48longwith15/16face DGLW224Fire-Rated 1-1/2highx24longwith1-1/2face DGLW424Fire-Rated 1-1/2highx48longwith1-1/2face 4. Wallmoldings:Knurledface. DGCM27 144x1-5/8x1channelmolding. DGWM24 1-1/2x1x144 C. uSgcurveddrywallsuspensionsystems: �. Valleytees(faceofgridconvex):1-1/2highx1-1/2knurledfacewithpartiallycorrugatedbulbandcross-tee

holesat8o.c.Madeofhot-dippedgalvanizedsteel. 2. Vaulttees(faceofgridconcave):1-1/2highx1-1/2knurledfacewithcross-teeholesat8o.c.Madeofhot-

dippedgalvanizedsteel. D. Accessories �. TransitionclipDGTC-90 2. SpliceclipDGSC-180 3. WallattachmentclipDGWC 4. Spliceplate 5. HubDGHUB E. Gypsumpanels �. GypsumpanelsmanufacturedinaccordancewithASTMC36. 2. 1/4,3/8,1/2,5/8Sheetrockbrandgypsumpanels(Regular,firecoDe, firecoDeC).(seeUSGDrywall/Steel

FramedSystemsSpecifications—SA92309250-USG-3). F. USGSheetrockbranddrywallaccessories;trims,expansionjoints,sealants,jointcompoundmaterials. (seeUSGGypsumPanels&AccessoriesSpecificationsSA92709250.

2.03 A. Cornerbead:Minimum#26gauge,zincalloywithorwithoutpaperflangesorplasticbead.Metal,Paperor B. Casingbead:Minimum#24gauge,zincalloyorplasticwithexpandedflanges.PlasticTrim

C. Controljoints:Minimum#26gauge,zincalloy,extrudedaluminumorplasticwithexpandedflanges.

2.04 A. Conventionalgypsumpanelfasteners(ASTMC1002).No.6Type-S,HiLobuglehead,self-drilling,self-tappingFasteners steelscrews.

Application Guide SpecificationsCurved Drywall Ceilings



willnotaffectlayoutandinstallationofsuspensionsystemcomponents. D. Beginningofinstallationshallsignifyacceptanceofconditionsinareastoreceiveceilingsuspensionsystem. F. Fire-ratingrequirements:Constructionabovefire-ratedassemblyshallmeetrequirementsasapplicableto

providefire-resistanceratingspecifiedinPart2-Products.

3.02 A. Fielddimensionsmustbeverifiedpriortoinstallation. Preparation

3.03 A. Standardreference:InstallinaccordancewithASTMC636,CISCAinstallationstandards,andotherapplicablecode Installation references.

B. Manufacturer’sreference:Installinaccordancewithmanufacturer’scurrentprintedrecommendations.C. Drawingreference:Installinaccordancewithapprovedshopdrawingsandlocateceilinginaccordancewith

mainteedimensionsrelativetoelevations.D. Componentandhangerwireinstallation:

Flatceilings:Mainteesshallbespacedamaximumof48oncenterandsupportedbyhangerwiresspacedamaximum48oncenterandasspecifiedbyULFireResistanceDirectoryattachinghangerwiresdirectlytostructureabove.Crossteesshallbespacedpermanufacturers’recommendationsandasspecifiedbyULFireResistanceDirectory.Curvedceilings:ValleyandVaultmainteesshallbespacedamaximum48.Hangerwiresshallbespacedamaximum48forVaultsmaintees.Hangerwiresshallbespacedamaximum24forValleymaintees.Crossteesshallbespacedaspermanufacturers’recommendations.Additionalhangerwiresmaybenecessarytostabilizeanycurvedceilingduringandafterdrywallattachment.Transitions:changesinelevationinsoffitandfasciaceilingapplications.Whenconstructingsteppedsoffits,bracingofthedrywallsuspensionsystemand/oradditionalhangerwiresmaybenecessarytoensurestabilityandstructuralperformanceduringandafterdrywallattachment.Themaximumverticalsoffitheightis48.(Maximumunsupporteddrywallareashallnotexceed48x24).Intermediatecrossteesarenotnecessarywhenbulkheaddimensionsdonotexceed24.Crossteespacinginhorizontalsoffitplaneisnottoexceed24.Intermediatecrossteesmaybenecessarytomaintainvisuallyacceptabledrywallplanesanddrywallcorners.

E. uSgsuspensionsystemwhenusedwithSheetrock brandgypsumpanellifetimelimitedwarranty:Bylifetimewemeantheusefullifeofaceilinguptoamaximumof30years.TheuSgdrywallsuspensionsysteminstalledwithoutSheetrock brandgypsumpanelshasa10-yearwarranty.Generalhangerwirenotes:Hangerwiresarerequiredwithin12onbothsidesofapivotedspliceclip.Atleast1hangerwireisrequiredwithin12ofatransitionclip.Limitations:Donotsupportwiresfrommechanicaland/orelectricalequipmentoccurringaboveceiling.

F. Accessories:Installaccessoriesasapplicabletomeetprojectrequirements.

3.04 A. Applygypsumpanelsfirsttoceilingandthentowalls.PositionallendsandedgesofgypsumpanelsatframingGypsumPanel members.Extendceilingboardtocornersandmakefirmcontactwiththewallangle,channelortopplate.Installation

Tominimizeendjoints,usepanelsofmaximumpracticallengths.Fitendsandedgesclosely,butnotforcedtogether.

B. Cutends,edges,scribeormakecutoutswithinthefieldofpanelsinaworkmanlikemanner.Cutgypsumboardtosizeusingaknifeandstraightedge.

Beautiful Results Every Time

Technical Service

800 USG.4YOUWeb Site

usg.comSamples/Literature

888 874.2450Samples/Literature E-mail

[email protected]/Literature/Fax

888 874.2348Customer Service

800 950.3839

Manufactured by USG Interiors, Inc.550 West Adams StreetChicago, IL 60661

AC3152/rev. 5-07© 2007, USG Interiors, Inc.Printed in U.S.A.

NoticeWe shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instructions or for other than the intended use. Our liability is expressly limited to replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered. Safety First!Follow good safety and indus-trial hygiene practices during handling and installation of all products and systems. Take necessary precautions and wear the appropriate personal protective equipment as needed. Read material safety data sheets and related literature on prod-ucts before specification and/ or installation.

Product InformationSee usg.com for the most up-to-date product information.NoteAll products described here may not be available in all geographic markets. Consult your local sales office or representative for information. TrademarksThe following are trademarks of USG Corporation or its subsidiaries: AquA-Tough, CenTriCiTee, Compässo, DiAmonD, Donn, DuroCk, DX, DXL, FiberoCk, FireCoDe, imperiAL, quiCk-reLeAse, reD-Top, sheeTroCk, sTruCTo-bAse, sTruCTo-gAuge, TuFF-hiDe, usg.Patents The following are the patent numbers for the USG Drywall Suspension System and its components: 5,937,605; 6,018,923; 6,047,512; and 6,138,425.

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