shaft wall - cemco

Life safety assurance for

modern building designs

Shaft Wall Systems

Walls that enclose elevator shafts, stairwells and other vertical shafts are the lifeline of a building. Should a fire occur, firefighters control the use of elevators, leaving stairwells as the only means for occupant egress or rescue within the building. Since these walls are an important part of the building, they must have the strength to withstand lateral loads and provide needed fire protection.

High-Performance Shaft Walls

3 USGShaftWallSystems

User’s Guide

This brochure explains: – What a shaft wall system comprises – The different applications where shaft wall systems can be used – How to select and specify the appropriate components of a shaft

wall system

Pages

UnderstandYourSystem 4 Overview

Applications

Components

PerformanceTesting

SelectYourSystem 14 PerformanceSelector

LimitingHeights

SolidShaftWall

LimitingSpans

DesignYourSystem 21 DesignDetails

GoodDesignPractices

SpecifyYourSystem 33 ApplicationGuideSpecifications

ForMoreInformation TechnicalService 800USG.4YOU

Websites usg.com usgdesignstudio.com


Overview

USG shaft wall systems are non-loadbearing gypsum wall partition assemblies constructed from outside the shaft at each floor. Shafts are enclosed early in construction, and the walls are finished later, along with interior partitions. Installation is quick and easy, using components and application procedures familiar to drywall contractors. This system installs faster than other multilayer gypsum panel systems because it is installed from one side, leaving the shaft free of scaffolding. The assemblies are constructed of gypsum liner panels friction-fitted into C-H studs in a progressive manner, with gypsum panels, gypsum fiber panels or cement board applied to the face.

TypicalShaft

WallAssembly

1"Sheetrockgypsumlinerpanels1"Sheetrock Mold toughlinerpanels1"Sheetrockglass-matlinerpanels

Utilitychase

USGC-Hstud

USGC-Hstud

USGJ-runner

TwoUSGJ-runners

Sheetrockgypsumpanels

Sheetrockgypsumpanels

Elevatorcar

Elevatorshaft

Elevatorshaftdoorframe

1"Sheetrocklinerpanels


Applications

Use USG shaft wall systems to construct elevator shafts, mechanical shafts, stairwells, air return shafts and horizontal membranes. These shafts are vital for vertical communication, power, water, fresh air, exhaust and a means of egress.

Walls IntermittentAirPressureLoads

Elevatorshafts Stairshafts

Idealforelevatorshaftssincethewallscanbeconstructed Accommodatesstairshaftsbyallowingbothsidesof

fromoneside,leavingtheshaftfreeofscaffolding.This thewalltobefinishedwhenrequired.Foraddedabuse

allowselevatorequipmenttobeinstalledsimultaneously. resistanceinstairwells,facelayerpanelscanbe

substitutedwithFiberockabuse-resistantpanels.

IntermittentAirPressureLoads SustainedPressureLoads

Mechanicalshafts Airshafts(unlined)

VerticalHVACpipingandductworkcaneasilybe Thesystemcanalsobeusedforverticalairshafts

containedwithinthesystem,aswellasallowingforwall withinthebuilding.Shaftscanbeunlinedwhenspecific

penetrationswhenrequired. conditionsaremet.Unlinedshaftwallscanaccommodate

sustainedairpressureupto10psf.


Applications

Walls SolidShafts HorizontalStudShafts

Solidshaftsarenormallyusedinareaswhereasmall Forcertainapplications,equipmentlimitationssometimes

sectionofshaftwallisneededforasingleverticalpipe makeitdifficulttoinstallshaftlinerpanelsandstuds

penetration.Thesolidshaftisstructurallylimitedtoa vertically.Thisistrueforwallsseparatingshaftswhenthere

heightof12feet,sincethesystemhasnostuds. isonlyastructuralbeamprovidedforsupportingthewall.

Ceilings ShaftWallCeilingMembrane

Thesystemcanalsobeinstalledhorizontallywhena

horizontalfire-ratedmembraneisrequired.Forone-

andtwo-hourfireratingsrefertoICCEvaluationReport

NER-258orProgressiveEngineeringReportAER-09038.


Components

USG shaft wall systems have been comprehensively tested for fire resistance ratings only when all of the system components are used together. Substitutions of any of the components are not recommended and are not supported by USG. Refer to the appropriate product material safety data sheet for complete health and safety information.

GypsumLinerPanels Sheetrock®BrandGypsumLinerPanels

–High-performancepanelshaveanoncombustiblecoreencasedinawater-resistant100%recycledgreenfaceand

backpaper

–UnderwritersLaboratories(UL)/UnderwritersLaboratoriesCanada(ULC)Classifiedforfireresistance

–Panelsare1"thickand24"widewithbevelededges

–RefertoproductsubmittalsheetWB2278formoreinformation

Sheetrock®BrandMold tough™GypsumLinerPanels

–High-performancepanelshaveanoncombustibleandmoisture-andmold-resistantgypsumcoreenclosedina

moisture-andmold-resistant,100%recycledbluefaceandbackpaper

–UL/ULCClassifiedastofireresistance



Sheetrock®BrandGlass-MatLinerPanels

–High-performancepanelshaveanoncombustibleandmoisture-andmold-resistantgypsumcoreenclosedin

amoisture-andmold-resistantglassmatonbothsides

–Canbeleftexposedforupto12months

–UL/ULCclassifiedastofireresistance



GypsumPanels Sheetrock®BrandFirecode®CoreGypsumPanelsandCementBoard –Alloftheadvantagesofregularpanelswithadditionalresistancetofire

–Availablein5/8"thickness,4'width


Sheetrock®BrandFirecode®CCoreGypsumPanels

–ProvideimprovedfireresistanceoverstandardFirecodepanelsbecauseofadditivesthatenhanceintegrityofthecore

underfireexposure

–Availablein5/8"and1/2"thicknesses,4'width



Components

Sheetrock®BrandMold tough™Firecode®CoreGypsumPanels

–Panelshaveanoncombustible,moisture-andmold-resistantgypsumcoreencasedinamoisture-andmold-resistant,

100%recycledgreenfaceandbrownbackpapers

–Taperedlongedgesforeasyfinishing

–Availablein5/8"thickness,4'width

–5/8"panelsareULClassifiedforfireresistance


Sheetrock®Brandultracode®CoreGypsumPanels

–3/4"-thickpanelsrequirefewerlayersofgypsumpanelsinapproveddesignswhenusedwithsteelstudsandmineral

woolinsulation

–Availablein4'width


Sheetrock®BrandMold tough™ultracode®CoreGypsumPanels

–3/4"panelshaveanoncombustiblemoisture-andmold-resistantgypsumcoreencasedinmoisture-andmold-

resistantgreenfaceandbrownbackpapers

–ULClassifiedastofireresistance,surface-burningcharacteristicsandnoncombustibility


durock®CementBoard

–Water-durable,mold-resistantsubstrateforhigh-moistureareas

–RefertoproductsubmittalsheetCB399formoreinformation

Fiberock®Abuse-ResistantInteriorPanels

–Resistdenting,breakingandpuncturing,eveninhigh-trafficareas

–Excellentfireresistance

–Madefrom95%recycledmaterials

–RefertoproductsubmittalsheetF102formoreinformation

Fiberock®aqua-tough™InteriorPanels

–Usedonlyforwalldesigns

–Increasedresistancetoabrasion,indentationandpenetration

–Madefrom95%recycledmaterials

–RefertoproductsubmittalsheetF134formoreinformation

iMperial®Firecode®CoreandFirecode®CCoreGypsumBase

–Largesize,rigidbaseforfire-ratedgypsumveneerplastersystems

–Designedfordirectorresilientattachmenttowoodorsteelframing

–Multilayeredlaminatedfacepapertocontrolwaterabsorptionandresistsag

–RefertoproductsubmittalsheetP790formoreinformation


SteelFraming USGSteelJ-Runner(JR) USGSteelC-HStud(CH)

USGSteelJamb-Strut(JS) USGSteelE-Stud(ES)

Thickness–SteelFramingaComponents DesignThicknessb MinimumThickness Style in. mils in. mils ga. CH,ES 0.0188 18 0.0179 18 25

JR 0.0239 22 0.0227 23 24

CH,ES,JR,JS 0.0359 33 0.0341 34 20

StructuralProperties–SteelFramingComponents Component Product AverageWeight Area Ix Sx

c AllowanceDesign andSize Identification (lb./lin.ft.) (sq.in.) (in.4) (cu.in.) Stress(ksi) 2-1/2"C-HStud 212CH-18 0.5186 0.1524 0.129 0.093 19.8

212CH-34 0.998 0.2910 0.239 0.1741 24.0

4"C-HStud 400CH-18 0.6118 0.1798 0.383 0.162 19.8

400CH-34 1.243 0.3433 0.730 0.318 24.0

6"C-HStud 600CH-34 1.366 0.4227 1.998 0.569 24.0

Double6"E-Stud 600ES-18 1.546 0.3982 2.004 0.628 20.00

600ES-34 2.372 0.6364 3.400 1.094 20.00

2-1/2"J-Runner 212JR-23 0.448 0.1346 0.117 0.085 3.00

212JR-34 0.670 0.2039 0.192 0.130 4.96

4"J-Runner 400JR-23 0.573 0.1705 0.351 0.163 3.00

400JR-34 0.857 0.2577 0.574 0.251 4.96

6"J-Runner 600JR-23 0.740 0.2183 0.937 0.295 3.00

600JR-34 1.107 0.3295 1.523 0.457 4.96

2-1/2"JambStrut 212JS-34 0.818 0.2398 0.226 0.143 3.00

4"JambStrut 400JS-34 1.006 0.2936 0.647 0.270 3.00

6"JambStrut 600JS-34 1.256 0.3654 1.673 0.485 3.00

Note(a)StudsandrunnerscomplywithASTMC645.(b)PropertiesofsteelframingmembershavebeencalculatedinconformancewithANSISpecificationfortheDesignofCold-FormedSteelStructuralMembers,1996edition.(c)Fullsectionmodulustobeusedwithcorrespondingdesignstress.

21/2", 4", 6"

1"

2"

3/4"1"

1"21/2"

3/4"1"

4", 6"

1"

3/8"

1"

21/2", 4", 6" 3"

1"

7/32"

13/8"

21/2", 4", 6"11/2"


Components

InteriorFinishingProducts Sheetrock®BrandAcousticalSealant

–SuperiorperformanceasafirecaulkinUL-classifiedjointsystems

–Minimizeswhistlinganddirtaccumulationduetoairmovementwhenappliedtopartitionperimeterandpenetrations

–RefertoproductsubmittalsheetJ678formoreinformation

Sheetrock®BrandFirstCoat

–Aflatlatexpaintformulatedtoprovideasuperiorfirst(prime)coatoverinteriorgypsumboardandconcretesurfaces

–Equalizesporosityandsurfacetexturedifferencestoprovidegreateruniformityoffinishcoat


Sheetrock®BrandAllPurposeJointCompound

–Versatileperformer:tape,finish,texture,laminateorskimcoat

–Combinessingle-package,ready-mixedconveniencewithgoodtapingandtoppingperformance

–RefertoproductsubmittalsheetJ60Aformoreinformation

Sheetrock®BrandpluS 3™LightweightAllPurposeJointCompound

–Weighsupto30%lessthanconventionalcompoundsandsandswiththeeaseofatoppingcompound

–Withverylowshrinkage,itrequiresonlytwocoatsovermetal,suchascornerbeadsandfasteners

–RefertoproductsubmittalsheetJ498Aformoreinformation

Sheetrock®BrandtuFF-hide™Primer-Surfacer

–Ahighsolids,vinyl,acryliclatex-basedcoatingforinteriorsprayapplicationovernewdrywall

–Singlesprayapplicationprovidesthesameresultsachievedusingatypicaltwo-stepprocessofskimcoatingsurfaces

withjointcompoundfollowedbyacoatofprimer

–Savestimeandmoney


Sheetrock®BrandPaperFacedMetalBeadandTrim

–Cost-effective,problem-free,beautifulcorners

–Superiorsolutiontoedgecrackingandchipping

–RefertoproductcatalogJ1424formoreinformation


Performance Testing

USG shaft wall systems provide superior safety and performance for an important building component.

PerformanceTests uSgshaftwallsystemsresultfromaprogramofextensivetestingandcontinuousimprovementstohelpyouachievethe

superiorperformancethatyourprojectdemands.Systemsprovideuptofour-hourfireresistanceandsoundratingsup

to52STC,andresistbothsustainedandintermittentlateralloadsandfatigueundercycliclateralloading.

TestingMethods AllUSGproductsandsystemsundergoexhaustivetestingtoensurethattheymeetexactingstandards.USGproducts

areclassifiedastofireresistanceandfire-hazardproperties.Aspartofthisprotocol,UnderwritersLaboratories(UL)

periodicallyauditsproductionofthesematerialstoensurecompliancewithnecessaryproperties.ULisanindependent,

not-for-profitorganizationthathastestedproductsforpublicsafetyforoveracentury.

Productsaremanufacturedandtestedinaccordancewithrecognizedstandards.ASTMInternationalisoneofthe

largestvoluntarystandardsdevelopmentorganizationsintheworld,andisatrustedsourcefortechnicalstandardsfor

materials,products,systemsandservices.

ThesesystemshavebeendesignedandtestedusingacceptedengineeringpracticeswithdeflectionlimitsofL/120,

L/240andL/360.Additionally,limitingheighttableslistedhereinaccountforflexuralandshearstresses.Awiderange

ofproductandsystemcombinationsisavailabletomeetperformancerequirements:intermittentandsustainedair

pressureloadingof5,7-1/2,10and15psf.

TestingResults FireProtection

Intheeventofafire,mechanicalshaftsandstairsarevitalchannelsforcommunication,power,water,air,exhaust

andegress—makingtheshaftsthelifelinesofthebuilding.Sinceitiscriticallyimportantthatthesewallsprotect

occupantsandnecessaryservicesfromfire,uSgshaftwallsystemshavebeentestedforfireendurance.

TheprimaryattributeofuSgshaftwallsystemsanditscomponentsisfireresistance.Testingsupportingthis

attributeensuresthatthiscriticalperformancecomponentwillnotbecompromisedwhenproperlyinstalled.

Thisfiretestingresultsinthefollowing:

–ULClassificationofallgypsumpanelcomponents

–ULfire-resistanceClassificationsforonetofourhours

–ULsystemtestingwithallmajorelevatordoormanufacturers

–ULlistingforfiredamperinstallation

–Firetestdataforelectricalpanels,call-buttonboxesandotherinterfaces

–ULlistingofshaftwallheadofwall

SeetheGoodDesignPracticessectionformoreinformationonfireresistance.

SoundControl

SoundcontroltestdatademonstratetheeffectivenessofuSgshaftwallsystemsinattenuatingsound.When

properlydesignedandinstalled,uSgshaftwallsystemswillincreasecomfortlevelsbyreducingunwantednoise

fromadjacentspaces.

Thestandardassemblyoffers39STCrating;47STCisachievedbyadding1"soundinsulationwithinthepartition

cavity,and52STCwithsingle-layer3/4"ultracodepanelsand3"soundinsulation.


Performance Testing

TestingResults Impact-ResistantforDurability Performance Impactedwitha60-lb.sandbag,uSgshaftwallsystemsproveddurable.Inthetest,threeimpactseachweremadeat

15ft.-lb.,30ft.-lb.,andeachfollowing15ft.-lb.intervaluntilfailure.At270ft.-lb.thetestwasstopped;whilecracked,

thewallwasnotpenetrated.Foradditionalinformationaboutabuse-resistant,secureorotherhardenedapplications,

contactUSGat800USG.4YOU.

Moisture/Mold

Thebestwaytominimizedamagefrommoistureandmoldistominimizeoreliminateexposuretowaterbefore,during

andafterconstruction.Inallcaseswheremoistureintrusionoccurs,eliminateallsourcesofmoistureimmediately.

Sheetrockgypsumlinerpanels,SheetrockMold toughgypsumlinerpanelsandSheetrockglass-matgypsumliner

panelshavewater-resistantfacings.Inaddition,SheetrockMold toughand Sheetrockglass-matgypsumlinerpanels

havemoisture-andmold-resistantpaperandawater-resistantcore.

Whenusedinconjunctionwithgoodconstructionpractices,theseproductswillminimize,butnoteliminate,therisk

ofmoistureandmolddamage.Formoreinformationonmoisturecontrolandmold,seeWB2317,Moisture, Mold, and

Construction Practices, andSA934,Moisture-Resistant Assemblies.ThefollowingWebsitesareanotherresource:

NewYorkCityDepartmentofHealth UnitedStatesEnvironmentalProtectionAgency ci.nyc.ny.us/html/doh epa.gov

Searchformoldresources. Searchformoldresources.

ResponsibleSolutionstoMoldCoalitionresponsiblemoldsolutions.org

Searchformoldresources.


AlternativeMaterialsand Thefollowingnotesofferalternativemethodsofconstruction.SpecialRequirements 1. Whereinsulationisshowninassemblydrawings,thespecifictypeofproductisrequiredintheassemblytoachieve

thestatedfire-resistancerating.Otherwise,mineralwoolorglassfiberinsulationmaybeincorporatedintoanyassembly

withoutcompromisingthefire-resistantrating.

2. Studdepthsareminimumrequiredforfire-resistancerating.

3. WhereRC-1resilientchannelisindicated,RC-1orequivalentmaybeused.RC-2isnotanequivalentsubstitution.

4. UseL/360deflectioncriteriaforlimitingheight/studselectionand20ga.minimumframingwhenapplyingdurock

cementboard.RefertoSA934,Moisture-Resistant Assemblies,formoreinformationonapplicationand

relatedproducts.

5. 5/8"iMperialFirecodeCoregypsumbase,5/8"SheetrockMoldTough FirecodeCoregypsumpanelsor5/8"Fiberock

aqua-toughinteriorpanelsmaybesubstitutedfor5/8"SheetrockFirecodeCoregypsumpanels.

6. 1/2"Sheetrock Mold tough FirecodeCCoreor1/2"iMperialFirecodeCCoregypsumbasemaybesubstituted

for1/2"SheetrockFirecodeCCoregypsumpanels.

7. 5/8"SheetrockFirecodeCoregypsumpanels,5/8"iMperialFirecodeCoregypsumbaseor5/8"Fiberockpanelscanbe

substitutedfor1/2"SheetrockFirecodeCCoregypsumpanels.

8. Use20ga.minimumframingwithFiberockpanels.

9. 1"SheetrockMold toughgypsumlinerpanels,orSheetrockglass-matgypsumlinerpanelsmaybesubstitutedfor

1"Sheetrockgypsumlinerpanelsinallsystemswithoutcompromisingthefirerating.

10. FormoreinformationaboutperformanceratedshaftwallsystemsandforcompletelistofUSG'sfire-rateddesigns,

visitUSGDesignStudioatUSGDesignStudio.com.

11. FordetailedinformationregardingULClassifieddesignsshowninthePerformanceSelector,pleaserefertotheUL

Fire-ResistanceDirectory—VolumeOneorvisitUL.com.

Performance Selector

1-HourFire-ratedConstruction Non-loadbearing AcousticalPerformance Reference

ConstructionDetail Description TestNumber STC TestNumber ARL Index

wt.8 •5/8"SheetrockFirecodeCoregypsumpanels, ULDesU415, SA926 1

31⁄8"

jointsfinished SystemA •2-1/2"USGC-HStuds25gauge24"o.c. orU469 •1"Sheetrockgypsumlinerpanels

2-HourFire-ratedConstruction

wt.9 •1/2"SheetrockFirecodeCCoregypsumpanels, ULDesU415, SA926 2

31⁄2"

facelayerjointsfinished SystemB •2-1/2"USGC-HStuds25gauge24"o.c. orU438 •1"Sheetrockgypsumlinerpanels

wt.8 •3/4"SheetrockultracodeCoregypsumpanels, ULDesU415, SA926 3

43⁄4"

jointsfinished SystemC •4"USGC-Hstuds25gauge24"o.c. •3"therMaFiberSAFB •1"Sheetrockgypsumlinerpanels

wt.10 •1/2"durockcementboard,jointsfinished ULDesU415, SA926 4

35⁄8" •5/8"SheetrockFirecodeCoregypsumpanels SystemD

•2-1/2"USGC-Hstuds20gauge24"o.c. •1-1/2"therMaFiberSAFB •1"Sheetrockgypsumlinerpanels •durockcementboard,screwattachedand laminatedtogypsumpanelwith4verticalstrip ceramictilemasticcenteredbetweenstuds

wt.9 •1/2"SheetrockFirecodeCCoregypsumpanels ULDesU415, SA926 5

31⁄2"

•2-1/2"USGC-HStuds25gauge24"o.c. SystemE •1"Sheetrockgypsumlinerpanels orU467 –jointsfinishedbothsides

wt.10 •1/2"SheetrockFirecodeCCoregypsumpanels ULDesU415, SA926 6

4"

appliedvertically,facelayerjointsfinished SystemF •RC-1resilientchannelorequivalent24"o.c. •2-1/2"USGC-HStuds25gauge24"o.c. •1"Sheetrockgypsumlinerpanels

wt.8 •1"x2"perimeterangles25gauge ULDesU529 SA926 7

2" •1"Sheetrockgypsumlinerpanel,fastenedto

angles •1/2"SheetrockFirecodeCCoregypsumpanels •1/2"SheetrockFirecodeCCoregypsumpanels, jointsfinished


39 USG-040901 Basedon4"C-Hstuds25gauge

38 USG-040917


48 RAL-OT-04-022 Basedon1"soundbattsincavity

50 RAL-OT-04-019 Basedon4"C-Hstuds25gaugewith

3"mineralfiberinsulation

51 RAL-OT-04-020 Basedon4"C-Hstudswith3"therMaFiber

SAFBinsulation


53 USG-040909 Basedon4"C-Hstuds25gaugewith 3"mineralfiberinsulation

58 USG-040910 Basedon4"C-Hstuds25gaugewith

additionallayeronlinerpanelsideand3"mineralfiberinsulation

2"

Alldetails,specifications,anddatacontainedinthisliteratureareintendedasageneralguide.Theseproductsmustnotbeusedinadesignorconstructionofanygivenstructurewithoutcompleteanddetailedevaluationbyaqualifiedstructuralengineerorarchitecttoverifysuitabilityofaparticularproductforuseinthestructure.


2-HourFire-ratedConstruction Non-loadbearing AcousticalPerformance Reference

ConstructionDetail Description TestNumber STC TestNumber ARL Index

Note:Studsizeandgaugeshownareminimums.Possiblepanelssubstitutions.

NoteStudsizeandgaugeshownareminimums.PossiblepanelalternativesshownoncrossreferenceofUSGPanelsandUlFireRatingsonpage7ofSA100,Fire-Resistant Assemblies.

•5/8"SheetrockFirecodeCoregypsumpanels, ULDesU437 SA926 8

51⁄4"

facelayerjointsfinished •4"USGC-Hstuds20gauge24"o.c.run horizontallyandattachedtoverticalUSG J-runners,20gauge •1"Sheetrockgypsumlinerpanels



43⁄8"

facelayerjointsfinished SystemG •2-1/2"USGC-Hstuds25gauge24"o.c. •1"Sheetrockgypsumlinerpanels


43⁄8"

facelayerjointsfinished SystemH •2-1/2"USGC-Hstuds25gauge24"o.c. •1"Sheetrockgypsumlinerpanels •5/8"SheetrockFirecodeCCoregypsumpanels, jointsfinished


wt.18 •3/4"SheetrockultracodeCoregypsumpanels, ULDesU415, SA926 11

63⁄8"

onfurringchannel24"o.c.,over2layers SystemI 3/4"SheetrockultracodeCoregypsumpanels, facelayerjointsfinished •2-1/2"USGC-Hstuds25gauge24"o.c. •1"Sheetrockgypsumlinerpanels •baselayeroverfurringchannelappliedvertically

49 USG-040902 Basedon4"C-HStuds



Wall Systems — Limiting Heights

USG shaft wall systems are engineered to withstand pressure loads and provide in-service impact resistance to ensure long-term performance and durability. Use this section to determine the size and gauge of framing for the system you select. You will need to know elevator pressures and other in-service demands.

Structural FlexingResistanceforIn-ServicePerformancePerformance Shaftwallsaresubjectedtobothpositiveandnegativepressuresaselevatorcabsriseanddescend.Thispistoneffect

ofanelevatorinitsshaftcausescontinualflexingoftheshaftwall.Intests,uSgshaftwallsystemsweresubjectedto

over1millionfulloscillationcyclestomodelwallperformancethroughthelifeofthebuilding.Thesetestsshowed

thata25ga.J-runnerisinadequateatthetoporbottomofashaftwall.Asthelongrunnerlegiscontinuallyflexed

fromwalldeflection,itcanruptureandscrewscanstripoutandfracturefromtheflexing.Oscillationtestsshowed

24ga.J-runnersminimizetheseproblemsandareessentialtolong-termsafety.

LimitingHeights Maximumpartitionheightsareshownforfourdifferentintermittentairpressureloadsandthreeallowabledeflections.

Theappliedpressureloadisselectedbythedesignerbasedonelevatorcabspeedandthenumberofelevatorsper

shaft.Insteadofusingonlydeflectioncriteria,USGdesigndataconsiderseveraladditionalfactorsindetermining

limitingpartitionheights.

A. Bendingstress—theunitforceexertedthatwillbreakordistortthestud.

B. Endreactionshear—determinedbytheamountofforceappliedtothestud,whichwillbendorsheartheJ-runner

orcripplethestud.

C. Deflection—theactualdeflectionunderaload.Allowabledeflectionisbasedontheamountofbendingunderload

thataparticularwallcanexperiencewithoutexceedingaprescribedratiorelatedtopartitionheight.

ElevatorShaft Theairpressureloadonshaftwallsdependsupontheelevatorcabspeedandthenumberofelevatorspershaft.Pressures ThefollowingrecommendationsarederivedfromUSGtestsconductedinthreehigh-risebuildingsranginginheight

from17to100stories.

RecommendedElevatorShaftPressureLoad Elevatorvelocityft./min. Oneortwoelevatorspershaft Threeormoreelevatorspershaft 0to180 5.0psf 5.0psf

180to700 7.5psf 5.0psf

700to1,600 10.0psf 7.5psf

1,600to2,000 15.0psfa 7.5psf

Note(a)Single-cabhigh-speedelevatorshaftsmayrequirespecialdesignconsiderations.


Wall Systems — Limiting Heights Table

IntermittentAirPressure Fire-ratedsystemB,D,F,G,H,I Fire-ratedsystemEb

Load(windload)–psf a StudType Designation Allowable 5 7.5 10 15 5 7.5 10 15

andSize deflection

2-1/2"C-HStuds 212CH-18 L/120 12'4" 10'10" 9'10" 8'7" 12'2" 10'8" 9'8" 8'5"

L/240 11'4" 9'11" 8'12" 7'10" 11'2" 9'9" 8'10" 7'9"

L/360 10'4" 9'1" 8'3" 7'2" 9'10" 8'7" 7'10" 6'10"

212CH-34 L/120 14'3" 12'5" 11'4" 9'11" 14'2" 12'5" 11'3" 9'10"

L/240 12'10" 11'3" 10'2" 8'11" 13'0" 11'5" 10'4" 9'1"

L/360 11'7" 10'1" 9'2" 8'0" 11'6" 10'0" 9'1" 7'12"

4"C-HStuds 400CH-18 L/120 17'9" 14'6" 12'7" 10'3" 16'4" 14'3" 12'11" 10'7"

L/240 15'7" 13'8" 12'5" 10'3" 15'2" 13'3" 12'0" 10'6"

L/360 13'11" 12'2" 11'1" 9'8" 13'4" 11'8" 10'7" 9'3"

400CH-34 L/120 19'11" 17'4" 15'9" 13'10" 19'6" 17'1" 15'6" 13'7"

L/240 18'1" 15'9" 14'4" 12'6" 17'11" 15'8" 14'3" 12'5"

L/360 16'2" 14'1" 12'10" 11'3" 15'10" 13'10" 12'7" 11'0"

6"C-HStuds 600CH-34 L/120 25'4" 22'2" 19'8" 16'1" 28'0" 25'1" 21'9" 17'9"

L/240 21'9" 19'0" 17'4" 15'1" 24'10" 21'9" 19'9" 17'3"

L/360 20'0" 17'6" 15'11" 13'11" 21'11" 19'2" 17'5" 15'2"

Fire-ratedsystemCc Fire-ratedsystemAc

Studtype Designation Allowable 5 7.5 10 15 5 7.5 10 15 andSize deflection

2-1/2"C-HStuds 212CH-18 L/120 — — — — 11'5" 10'0" 9'1" 7'11"

L/240 — — — — 10'7" 9'3" 8'4" 7'4"

L/360 — — — — 9'4" 8'2" 7'5" 6'6"

212CH-34 L/120 — — — — 13'5" 11'8" 10'8" 9'3"

L/240 — — — — 12'3" 10'9" 9'9" 8'6"

L/360 — — — — 10'10" 9'6" 8'7" 7'6"

4"C-HStuds 400CH-18 L/120 15'2" 12'5" 10'9" 8'9" 15'2" 12'5" 10'9" 8'9"

L/240 14'5" 12'5" 10'9" 8'9" 14'5" 12'5" 10'9" 8'9"

L/360 12'9" 11'2" 10'1" 8'9" 12'9" 11'2" 10'1" 8'9"

400CH-34 L/120 20'5" 17'10" 16'2" 13'4" 20'5" 17'10" 16'2" 13'4"

L/240 17'6" 15'3" 13'10" 12'1" 17'6" 15'3" 13'10" 12'1"

L/360 15'3" 13'4" 12'1" 10'7" 15'3" 13'4" 12'1" 10'7"

6"C-HStuds 600CH-34 L/120 26'3" 21'5" 18'7" 15'2" 26'3" 21'5" 18'7" 15'2"

L/240 24'0" 20'12" 18'7" 15'2" 24'0" 20'12" 18'7" 15'2"

L/360 21'1" 18'5" 16'9" 14'8" 21'1" 18'5" 16'9" 14'8"

FormoreinformationconsultProgressiveEngineeringReportAER-09038atp-e-i.com

NotesRunnerfastenersshouldwithstand193-lb.singleshearand200-lb.bearingforce;attachmentspacingshouldnotexceed24"o.c.SeethePerformanceSelectorforsystemreferencesandratedassemblydetails.L/180dataavailableuponrequestfromUSG.Limitingcriteria:f–bendingstress,d–deflection,v–endreactionshear,c–practicallimitation.(a)Studspacingof24"forallvalues.(b)Forassemblywithsingle-layerboardbothsidesofstuds.(c)Forassemblywithsingle-layerboardattachedtostuds.(d)AttachmentofUSGsteeldouble6"E-studforuSgshaftwallsystems.Thestudsaretobeattachedback-to-back(webtoweb)withpairs1/2"oftypeS-12panheadscrewsinstalledintworows,spacedaswidelyapartaspossible.Thefirstandlastpairsoffastenersshallstartwithin6"ofeachendofthestuds.Theyshallthenbespacedatamaximumof12"oncenterthroughoutthebodyoftheentirestud.(e)UseJR20runnerforthisheight.



Wall Systems — Limiting Heights

UnlinedShafts Gypsumshaftwallshavebeenusedformanyyearsforventandairshafts.Theirfire-resistantfeaturesandeconomical

dryconstructionmakethemidealforthisuse.Tofunctionproperly,ventandairshaftsystemsshouldbedesignedwith

thefollowingperformanceprovisions:

1. Gypsumboardsurfacetemperaturedoesnotexceed125°F.

2. Separateapprovedlinersshouldbeinstalledinareassubjecttocontinuousmoistureoverspray,condensationorair

streamtemperatureover125°F.

3. Airstreamdewpointtemperaturesaremaintainedbelowgypsumboardsurfacetemperature.

4. Theassemblyisconstructedtowithstandsustaineddesignuniformairpressureloadsnotexceeding10psf.Startup

surgeloadsshouldnotbegreaterthan1-1/2timesthedesignstaticload.(Seetablebelowforlimitingheights.)

5. Toensureairtightconstruction,selectappropriatesealantsandapplywhererequired.

Sustainedpressureload–psf 2-hr.fire-ratedsystem 1-hr.fire-ratedsystem

StudType Designation Stud Allowable 5 10 5 10andSize Spacing deflection

2-1/2"C-HStuds 212CH-18 24" L/120 10'10" 8'7" 10'0" 7'11"

L/240 9'11" 7'10" 9'3" 7'4"

L/360 9'1" 7'2" 8'2" 6'6"

212CH-34 24" L/120 12'5" 9'11" 11'8" 9'3"

L/240 11'3" 8'11" 10'9" 8'6"

L/360 10'1" 8'0" 9'6" 7'6"

4"C-HStuds 400CH-18 24" L/120 14'6" 10'3" 12'5" 8'9"

L/240 13'8" 10'3" 12'5" 8'9"

L/360 12'2" 9'8" 11'2" 8'9"

400CH-34 24" L/120 17'4" 13'10" 17'10" 13'4"

L/240 15'9" 12'6" 15'3" 12'1"

L/360 14'1" 11'3" 13'4" 10'7"

6"C-HStuds 600CH-34 24" L/120 22'2" 16'1" 21'5" 15'2"

L/240 19'0" 15'1" 20'12" 15'2"

L/360 17'6" 13'11" 18'5" 14'8"


NotesRunnerfastenersshouldwithstand193-lb.singleshearand200-lb.bearingforce;attachmentspacingshouldnotexceed24"o.c.(a)UseJR20runnerforthisheight.


Wall Systems — Solid Shaft Wall

USG shaft wall systems can be used as a vent enclosure for vertical shafts with a two-hour fire rating per UL Design U529. This shaft assembly is particularly suited for structures having a number of relatively small and separated mechanical, service and ventilator shafts.

VentShaftElevation

WallIntersection Corner

NoteLimitingheightofsystemis12.0".Installpanelsverticalandfullheightonly.

Vent shaft elevation

SHEETROCK setting type joint compound lamination

1/2" SHEETROCK FIRECODE C core gypsum panel – 11/2" type G screws 24" o.c.

1/2" SHEETROCK

FIRECODE C Core gypsum panel – 11/2" type G screws 24" o.c.

1" SHEETROCK gypsumliner panel –15/8" type S screws 12" o.c. to angle

angle runner

3'

2' 2'

4'

1' 4' 2'

25 ga. 1" x 2" angle

SHEETROCK gypsum panels

1" SHEETROCK gypsum liner panel

24 ga. 2" x 2" angle





Ceiling System — Limiting Spans

HorizontalAssemblies uSgshaftwallsystemsinstalledhorizontallyprovideeconomicalconstructionforfire-resistiveductenclosures,

corridorceilingsandstairwaysoffits.

TripleLayer

With1"linerpanelsinsertedinUSGC-Hstuds24"o.c.andtriple-layer1/2"SheetrockFirecodeCCoregypsumpanels

screw-attachedtostuds,thesystemprovidestwo-hourprotectionfromfire.

DoubleLayer

Withdouble-layer1/2"SheetrockFirecodeCCoregypsumpanelsscrew-attachedtostuds,theassemblyprovides

two-hourfire-resistiveceilingconstructionforcorridorsandstairsoffits(seeDesignDetails).

SingleLayer

Withsingle-layer5/8"SheetrockFirecodeCCoregypsumpanelsscrew-attachedtostuds,theassemblyprovides

one-hourfire-resistiveceilingconstructionforcorridorsandstairsoffits.

Limitations

1. USGC-Hstudsarenotdesignedtocarryliveloadsormechanicalequipmentorprovidematerialstoragearea.

2. Maximumstudspacingis24"o.c.;maximumspansareshownintablebelow.

LimitingSpans— HorizontalShaftWallsa


Note(a)BasedonL/240allowabledeflectionwithstudsat24"o.c.andJR24runner.(b)FullsteelstressallowedbasedonASTME119.(c)Allowablesteelstressreduced50%.

2-Hr.HorizontalMembraneorMetalDuctEnclosure

Triple-layer1/2"gypsumpanelsb MaximumSpan212CH-18 6'5"

212CH-34 8'3"

400CH-18 8'6"

400CH-34 12'0"

600CH-34 12'8"

2-Hr.CorridorCeilingsandStairSoffits

Double-layer1/2"gypsumpanelsc MaximumSpan212CH-18 6'0"

212CH-34 9'2"

400CH-18 7'10"

400CH-34 13'2"

600CH-34 15'10"

1-Hr.Single-layer5/8"gypsumpanelsc MaximumSpan212CH-18 6'7"

212CH-34 10'3"

400CH-18 8'8"

400CH-34 14'6"

600CH-34 17'5"

Ceiling Membrane

2-Hr.RatedAssembly–HorizontalMembraneorMetalDuctEnclosure


1-Hr.FireRatedAssembly(seeNER-258orAER-09038)–CorridorCeilingandStairSoffit 2-Hr.FireRatedAssembly(seeNER-258orAER-09038)–CorridorCeilingandStairSoffit

SHEETROCK acoustical sealant


duct surface

Rotated Section


Metal Duct Enclosure - 2-Hr. Rated Assembly

USG steel C-H studUSG steel J-runner

fastener 24" o.c. max. (shear and withdrawal resistance as required by specific design conditions)

fastener 24" o.c. max. (shear and withdrawal resistance as required by specific design conditions)


1/2" type S pan head screw at 12" o.c. (attach both sides of C-H stud and J-runner at top and bottom of stud)

max. height 4'-0"

max. span 8'-11" with 25 ga. studs

max. span 11'-8" with 20 ga. studs


Design Details

USG steel J-runner

fasteners as required 24" o.c.




USG steel C-H studUSG steel J-runner


SHEETROCK gypsum panel



USG steel C-H stud


Design Details

Basic Interfaces — System B

HeadSection(ULSystemHW-D-0603) BaseSection(ULSystemBW-S-0016)

Call-ButtonBox

USG steel C-H stud


USG steel J-runner

SHEETROCK FIRECODE CORE

gypsum panels

5/8" max .1" min .

3/8" to 1/2"

SHEETROCK gypsumliner panels

SHEETROCK acoustical sealant as required for sound

1" SHEETROCK gypsum liner panels

gypsum panel cant screw–attached to vertical studs(for projections over 4")

USG steel J-runner

over4"

75˚min.

USG steel C-H stud

SHEETROCK FIRECODE Core gypsum panels

4" min

SHEETROCK FIRECODE Coregypsum panels

call-button box

25 ga. steel strip(6"x12" min.)


USG steel J-runner

USG cornerreinforcement

USG steel C-H stud

SHEETROCK FIRECODE

CORE gypsum panels

1” SHEETROCK gypsumliner panels

1” SHEETROCK gypsum liner panels


USG steel J-runner




sealant

USG steel J-runner

USG corner reinforcement


1" SHEETROCK or SHEETROCK

MOLD TOUGH

gypsum liner panel


USG steel J-runner

USG steel C-H stud




WallJunction OutsideCorner

WallIntersection InsideCorner


Design Details

Basic Interfaces — System B

Outlet/SwitchBox ControlJoint

StairHangerandRodApplication Cross-SectionatStairHanger

USG steel J-runner

mineral wool insulation

1/2" joint width


* up to 2-hour fire rating

control joint

1" SHEETROCK

gypsum liner panels



outlet box

Note: the surface area of individual outlet or switch boxes shall not exceed 16 square inches. The aggregate surface area of all boxes shall not exceed 100 square inches.(per U.L. fire resistance directory)



hanger rod

steel angle

stair landing

stair stringer

stairwell side


USG steel C-H stud 24" o.c.

hanger rod



NoteThesurfaceareaofindividualoutletorswitchboxesshallnotexceed16squareinches.Theaggregatesurfaceareaofallboxesshallnotexceed100squareinches.(perULfireresistancedirectory)

Z-clip attached to beambefore fireproofing

Z-clip max. spacing24" o.c. min. 20 ga. min.2 fasteners per leg

USG steel J-runner USG steel C-H stud

fasteners

Steel beam with fireproofing

SHEETROCK

FIRECODE CORE

gypsum panels



USG steel J-runner attached to beambefore fireproofing

continuous 14 ga .steel plate

8" max .11/2" min .


fasteners



SHEETROCK FIRECODE CORE

gypsum panels

steel plate (20 ga. min.)fastened to studs parallelto stringers as required


1" SHEETROCK

gypsum liner panel

USG steel J-runnerattached to beambefore fireproofing

power


-actuatedfastener 24" o.c .





HandrailApplication SteelBeam(ULSystemHW-D-0610)

SteelBeamwithZ-Clip(ULSystemHW-D-0609) SteelBeamwithOffset(ULSystemHW-D-0611)


Design Details

Fire Damper

TypicalPenetrationsElevationatDuctOpeningTestedperULR13479

SectionA SectionB 1-1/2Hr.FireDamperTestedperULR13479 1-1/2Hr.FireDamperTestedperULR13479

1/2" x 1/2" x 16 gaugegalvanized angle

damper sleeve

1/2" max.



USG steel J-runnerheader

26 USG Shaft Wall Systems

1/2" x 1/2" x 16 gaugegalvanized angle

damper sleeve

1/2" max.

USG steel J-runner

USG steel J-runner

USG steel J-runner

duct opening

B

A

USG steel E-studs or J-runnersback to back

ceiling

USG steel C-H studs


Elevator Door Framing

ElevatorDoorFraming ElevatorDoorRoughOpening

SectionA-ADetail

Notes1.Framingatelevatordoorshallbeaminimum4"studsandrunners20gauge.2.HorizontalplacementoflinerpanelandC-HStudsperULDesignU437.3.Flangesofthejambstrutmustbecontinuouslybracedbyscrewconnectionstothelinerandfacepanels12"o.c.4.Fordoorsgreaterthan5'wideand/ortransomheightsgreaterthan4',reinforcethe400JS-34withanested400ES-34.

USG steel J-runner

USG steel J-runner

10'-0" max

10'-0" max

USG steel J-runner

USG steel J-runner header

5'-0" max. opening

20 ga. jamb strut

20 ga. jamb strutUSG steel J-runner

USG steel J-runner

USG steel J-runner

screw attachedboth sides



Elevator Door Rough Opening

A

A

USG C-H studUSG C-H stud

1" SHEETROCK gypsum liner panelon each side of jamb strut

USG jamb strut

fasten both sides of C-H stud to J runner


screw attachat bottom legof C-H stud

SHEETROCK

FIRECODE Coregypsum panels

USG steel J-runner

structural member

5/8" SHEETROCK

FIRECODE Core gypsum panels

1"SHEETROCK acoustical sealant


USG steel J-runner


locate screws to avoid studs

3/8" J-runner to stud1/2" J-runner to panel

USG steel C-H stud

5/8" SHEETROCK

FIRECODE Core gypsum panels



Design Details

Wall Systems – C-H Studs and Liner Panels Installed Horizontally

HorizontalShaftwallElevationperULDesignU437 SectionC-CHeadSection

SectionB-BWallIntersection SectionD-DBaseSection

sealant

USG steel J-runner


5/8" SHEETROCK FIRECODE Core gypsum panels

structural member

USG steel J-runners

USG steel J-runner header

A

AUSG C-H studs


B B

C

C

D

D

NoteHorizontalframingshallbeaminimum4"C-HStudsandrunners20gauge.


Good Design Practices

Use this section as a reference if questions arise during the design or application of USG shaft wall systems.

This section is an overview of good design, application, installation and safety considerations that should be addressed when USG products and systems are used. This section outlines some major issues, but is not intended to be comprehensive.

We recommend that architects and contractors seek the assistance of safety professionals, especially at the construction site, because there are many factors to consider that are not included here. For more detailed information on safety and material handling, please refer to Chapter 13 of The Gypsum Construction Handbook.

1 SystemPerformance USGconductstestsonproductsandsystemstomeetperformancerequirementsspecifiedbyvariousagencies.Upon

writtenrequestwewillprovidetestcertificationforpublishedfire,sound,structuralandotherpertinentdatacovering

systemsdesignedandconstructedaccordingtoourpublishedspecifications.Substitutionsofanyofthecomponents

arenotrecommendedandarenotsupportedbyUSG.

Standards

Thefollowingstandardsapply:

ASTMC1396:StandardSpecificationforGypsumBoard

ASTMC1658:StandardSpecificationforglass-matGypsumPanels

ASTMC1325:StandardSpecificationforNon-AsbestosFiber-MatReinforcedCementitiousBackerUnits

ASTMC1278:StandardSpecificationforFiber-ReinforcedGypsumPanel

ASTMC840:StandardSpecificationforApplicationandFinishingofGypsumBoard

ASTMC754:StandardSpecificationforInstallationofSteelFramingMemberstoReceiveScrew-AttachedGypsum

Board,BackingBoard,orWater-ResistantBackingBoard

ASTMC645:StandardSpecificationforNon-Load(Axial)BearingSteelStuds,Runners(Track),andRigidFurring

ChannelsforScrewApplicationofGypsumBoard

ASTMC475:StandardSpecificationforJointTreatmentMaterialsforGypsumWallboardConstruction

ASTMC1002:StandardSpecificationforSteelDrillScrewsfortheApplicationofGypsumBoard

ASTMC1047:StandardSpecificationforAccessoriesforGypsumWallboardandGypsumVeneerBase

ASTMD3273:StandardTestMethodforResistancetoGrowthofMoldontheSurfaceofInteriorCoatings

inanEnvironmentalChamber

2 FireResistance Usefiretestdatatocompareandselectmaterialsandassemblies,andtosecureacceptancebytheauthorityhaving

jurisdiction.SA100,Fire-Resistant Assemblies,showstestedfireresistanceforvarioussystems.

ForassembliestestedatUnderwritersLaboratoriesInc.(UL),ratingsarespecifictothedesignstested,anddonot

necessarilyapplytoalternateproductsorconstruction.Forexample,insulationmaynotbeaddedtofloor-orroof-ceiling

assemblies,unlessdescribedintheULdesign.Additionofinsulationintheconcealedspacebetweentheceilingmembrane



andthefloororroofstructuremayreducethehourlyratingofanassemblybycausingprematuredisruptionoftheceiling

membraneand/orhighertemperaturesonstructuralcomponentsunderfireexposureconditions.

Increasingthesizeorgaugeofthestud(e.g.,2-1/2"C-Hstud25gaugeto4"C-Hstud20gauge)doesnotaffect

thefireresistanceratingoftheassembly.

Formoredetailedinformation,refertothesystemfireresistancePerformanceSelectoronpages14-15.

3 StructuralCriteria Structuredesignmusttakeintoaccounttheconditionsthatwillexistandtheresultingstressesandmovements.Loadbearing

wallsincludetheexteriorwallsofabuildingandsomeinteriorwalls.Thesestructuresmustbedesignedtocarrytheweightof

thestructure,itscomponentsandotherloadsthatoccuroncethebuildingisoccupied.

Theamountofaxialloadthatstructuralmemberscanbearwillvarywiththeamountoflateralload(pressurefromwind

orotherhorizontalstresses)thatthefinalassemblymayincur.

Manufacturersofstructuralcomponents,particularlysteelframing(studs,runners,joists)providetablesthatidentifythe

maximumallowableloadsforvariouscomponentsunderspecificconditions.Thesetablestypicallystartat5psflateralloads

andincreasein5or10psfincrementstoabout40psf.Interiorpartitionsarepercodedesignedfor5psflateralloads.

Interiornon-bearingpartitionssuchasuSgshaftwallarenotdesignedtocarryaxialloads.Limitingheightsarebasedon

stressordeflectionlimitsforgivenlateralloads.Heightlimitationsdependonthegaugeofthesteelused,dimensionsofthe

stud,studspacing,andtheallowabledeflectionlimit.Forlimitingheighttables,seepage17;forhorizontalshaftwallspan

table,seepage20;andforlimitingheights,unlinedreturnairshafts,seepage18.

Note:Sizeandgaugeavailabilityisbaseduponlimitingheightstables.Othersizesandgaugeshavenotbeen

evaluatedforperformance.

4 ControlJoints— Locatingcontroljointsistheresponsibilityofthedesignprofessional/architect.Integratethesesuggestionswith

BuildingMovement projectconditionswhendeterminingspecificlocationsforcontroljoints.

“Controljoint”isageneraltermformethodsusedtominimize(noteliminatethepotentialfor)crackinginpartitions

andceilings.Specifically,acontroljointminimizescrackinginthefaceofapartitionorceiling.Attheperimeterofapartition

orceiling,itiscalledaperimeterreliefjoint.

Acontroljointiseffectiveinminimizingcrackingcausedbytensileorcompressivemovementinamembraneresulting

fromthermal,hygrometricandstructuralmovement.Isolateshaftwallsurfaceswithcontroljointsorothermeanswhere:

–constructionchangeswithintheplaneoftheshaftwall

–shaftwallrunexceeds30'

–expansionorcontroljointsoccurthroughthebuildingitself

–instairwellsateachfloorlevel

Ceiling-heightdoorframesmaybeusedascontroljoints.Less-than-ceiling-heightdoorframesshouldhavecontroljoints

extendingtoceilingfrombothcornersonbothsidesofthepartition.Treatwindowopeningsinsamemannerasdoors.

Zinccontroljoints,whenproperlyinsulatedandbackedbygypsumpanels,havebeenfire-endurancetestedforusein

one-andtwo-hourfire-ratedwalls.

Properinstallationofcontroljointsinpartitionsandceilingsrequiresbreakingthegypsumpanelsorlathbehindthecon-

troljoint.Inceilingconstruction,theframingshouldalsobebroken.Inpartitions,separatestudsareusedoneachsideofthe

jointwiththerunnertrackseparatedatthatlocation.

5 PressureLoads— Whereshaftwallsencloseelevatorandreturnairvents,andintermittentpressuresupto15psfareexpected,

MinimizingWind Sheetrockacousticalsealantisrecommendedatintersectionswithfloors,ceilings,columns,ducts,etc.toseal Noise peripheriesandpenetrationsandminimizewhistlinganddirtaccumulationduetoairmovement.Sealantselectionincluding


jointtreatment,surfacecoatingsanddetailstosealthewallunderthesesustainedpressuresmustbeprovided

bythedesigner.Seepages16-17forinformationonevaluatingpressureloadingandselectingtheappropriateframing

componentsbaseduponthesedesigncriteria.

6 PressureLoads— Shaftwallsmaybeusedforairhandlingwithsustainedpressuresupto10psf.Whenairpressureexceeds10psf,

AirHandling airhandlingshouldbecontainedwithametalduct.Seepages18-19forinformationaboutairhandlingandvent

shaftenclosures.

7 Penetrations Penetrationsoftheshaftwall,suchasdoorframesandductopenings,requireadditionalreinforcementatcornersto

distributeconcentratedstressesifacontroljointisnotused.Penetrationsgreaterthan48"widerequiresupplemental

supportfortheshaftwallattheopening.Whereaccesspanelsorlargeductpenetrationsoccurinshaftshavingpressure

loads,headers,sillsandadjacentchannelsmayrequirereinforcingtoproperlydistributetheseloads.

8 SoundControl Usesoundtestdatatocompareandselectmaterialsandconstructions.Thesedatafrequentlyareessentialforsecuring

compliancebytheagencyhavingjurisdiction.SeeSA200,Acoustical Assemblies,foracousticalperformance.

Soundcontrolreferstotheabilitytoattenuatesoundpassingthroughapartition.TheSoundTransmissionClass(STC)isa

widelyusedratingofsoundattenuationperformance.Itisrelativelyaccurateforspeechsoundsbutnotformusic,mechanical

equipmentnoiseoranysoundwithsubstantiallow-frequencyenergy.ItistestedperASTME90andratedperASTME413.

SeethePerformanceSelectorfortheSTCratingsforuSgshaftwallsystems.

SoundtestsareconductedunderideallaboratoryconditionsperASTMprocedures.USGproductsareassembledinaspecific

mannertomeettherequirementsoftheseASTMprocedures.Substitutionofmaterialsotherthanthosetestedordeviation

fromthespecifiedconstructionmayadverselyaffectperformance.

Fieldperformancedependsonbuildingdesignandcarefulattentiontodetailingandworkmanship.Wherethese

partitionsareusedforsoundcontrol,sealthepartitionperimeterwith1/4"min.roundbeadofSheetrockacoustical

sealant.Sealaroundallpenetrations.

9 Moisture Understandingwaterandmoldanditsimpactontheconstructionprocessandbuildingmaterialsareintegralto

andMold gooddesignandconstructionpractices.USGoffersreferencesandadditionalsourcesthatreinforcegooddesign,

constructionandmaintenancepractices.Thesepracticesaregenerallyrecognizedasnecessarytominimizemoisture-

relatedproblemsandthegrowthofmoldinabuildingenvironment.Ifyouhaveadditionalquestions,pleasecontactthose

sourcesorUSG.

Thebestwaytoaddressmoldistomakesurethatbuildingmaterialsdonotgetwetbeforeandduringinstallationandare

notexposedtomoistureinsidethefinishedbuilding.SeeMoisture/MoldinthePerformanceTestingsectionformoreinformation.

10 AirandWater Flashingandsealantsasshownintheconstructiondocumentsandasselectedbythearchitectand/orstructuralengineer Infiltration shouldbeprovidedtoresistairandwaterinfiltration.Theflashingandsealantsselectedshallbeinstalledinaworkmanlike

mannerinappropriatelocationstomaintaincontinuityofair/waterbarriers,particularlyatwindows,doorsandother

penetrationsofexteriorwall.

11 VaporRetarders Watervaporcontrolmustalwaysbeconsideredinthedesignofexteriorwallsystems.Humidityandtemperatureconditions

mayrequiretheinstallationofavaporretardertopreventmoisturecondensationwithinthewallandtheresultingdamage.

Todeterminethenecessityandlocationofvaporretarders,awatervaportransmissionanddewpointanalysisofthelayered

wallassemblyshouldbeconductedbyaqualifiedengineer.



12 ProductHandling GypsumPanels

andStorage Protectallgypsumproductsfromexposuretoexcessiveorcontinuousmoistureandtheelementselementsbefore,during

andafterinstallation.Eliminatesourcesofmoistureimmediately.

MetalFramingProtection

Givelight-gaugemetalcomponentssuchassteelstudsandrunners,furringchannelsandresilientchannelsadequateprotection

inthewarehouseandonthejobsiteagainstrustingcausedbymoisture.InmarineareassuchastheCaribbean,Floridaandthe

GulfCoastwherechlorideandseasaltarepresentincombinationwithexcessivelyhighhumidity,useofcomponentsthatoffer

increasedprotectionagainstcorrosionisrecommended.

13 Application Call-ButtonFloorIndicatorandElectricBoxes

Shaftwallswillaccommodateoutletboxeswithdepthsuptothestudwidth.Seepage24fordetails.

FramingAttachment

Runnersandstudsattachedtobeamsorcolumnsmayneedtobeinstalledbeforesteelisspray-fireproofed.Excess

fireproofingshouldberemovedfromrunnersandstudsbeforeinstallingshaftwalllinerandsealant.

SheetrockGypsumLinerPanelApplication–ButtJoints

WhenaninstallationofuSgshaftwallheightexceedsmaximumavailablepanellength,itisnecessaryto

incorporateabuttjointbetweentwolinerpanels.Staggerbuttjointsinadjacentpanelstopandbottomtoprevent

acontinuoushorizontaljoint.Jointshouldbelocatedintoporbottomthirdofwall.Horizontaljointsneednotbebacked

bysteelframingtomaintainthefire-ratingoftheassembly.

14 PaintingSystems PaintingproductsandsystemsshouldbeusedthatcomplywithrecommendationsandrequirementsinappendicesofASTM

C840.Forpriminganddecoratingwithpaint,textureorwallcovering,followmanufacturer’sdirections.

Allsurfaces,includingappliedjointcompound,mustbethoroughlydry,dust-freeandnotglossy.PrimewithSheetrock

FirstCoatorwithanundiluted,interiorlatexflatpaintwithhigh-solidscontent.Allowtodrybeforedecorating.

Toimprovefastenerconcealment,wheregypsumpanelwallsandceilingswillbesubjectedtosevereartificialornatural

sidelightinganddecoratedwithaglosspaint(eggshell,semi-glossorgloss),thegypsumpanelsurfaceshouldbeskim

coatedwithjointcompoundtoequalizesuctionandtexturedifferencesbetweenthedrywallfacepaperandthefinishedjoint

compoundbeforepainting.SheetrocktuFF-hideprimer-surfacerskimsandprimesinasingleapplication.

15 Screws Type Sscrewsaresuitableforgypsumpanelorgypsumbaseattachmentto25and20ga.steelstuds.Type S-12screws

shouldbespecifiedforotherapplicationstosteelheavierthan20ga.Screwlengthsshouldbe1"forbaselayer(1-1/4"

when3/4"ultracodeisused)and1-5/8"forfacelayerandatleast3/8"longerthanthetotalthicknessforotherapplications.

Wallsover16'highshouldhavestudsscrew-attachedtorunners.

16 SteelDoorFrames Orderedseparately,shouldbeatleast16ga.steel,shopprimed,andhavethroatsaccuratelyformedtooverall

thicknessoftheshaftwallplus3/32"minimum.Theyshouldbeanchoredatfloorwith16ga.steelplatesweldedtotrim

flanges,withprovisionfortwopower-drivenanchorsorequalperplate.Jambanchorsshouldbe18ga.steelweldedinjamb

andscrew-attachedtoanchors.

USGreservestherighttomakechangesorimprovementsinthedesignofallcatalogueditemswithoutnoticeandwithout

obligationtoincorporatethesechangesorimprovementsinitemsalreadymanufactured.

ThisguidespecificationisprovidedtoassistyouinspecificationofuSgshaftwallsystems.IfyouhaveadditionalquestionsorwouldlikemoreinformationregardingthisorotherUSGproductsandsystems,pleasecontactUSGat800USG.4YOUorvisitusgdesignstudio.com

Part 1: General

1.1 Drawingsandgeneralprovisionsoftheprojectcontract,includingGeneralandSupplementaryConditionsandDivision1RelatedDocuments SpecificationSections,applytothisSection.USGSystemFolderSA926–uSgShaftWallSystems.

1.2 SpecifytheappropriateuSgshaftwallsystemtomeetprojectrequirementsforfireresistance,structuralScope performance,soundcontrolandaesthetics.

1.3 A. ThissectionincludesthefollowinguSgshaftwallsystemsSummary 1. Verticalshaftenclosures

2. Stairenclosures

3. Horizontalassemblies

4. Ventshaftenclosures

B. RelatedSections:

1. Division9Sheetrockgypsumpanelsandassemblies

2. Division9iMperialgypsumbaseandVeneerPlasterAssemblies

1.4 A. ShaftWall:Anassemblyofsteelframing,gypsumboardsandothermaterialsusedtoencloseelevatorshafts,Definitions stairways,airshaftsandmechanicalcomponents.

B. GypsumBoardConstructionTerminology:RefertoASTMC11fordefinitionoftermsforgypsumboardconstructionnot

definedinthisdocument.

1.5 A. ThesystemsareULListedforfireresistance.Performance B. Systemfire-resistancetestingwithelevatordoormanufactureratUL.Requirements

C. Fire-resistancetestedpenetrationdetailsforcall-buttonboxesandpositionindicators.

D. Oscillationtestedto1millioncyclestoensureperformanceofthelifeofthebuilding.

E. ULListedfiredamperapplication.

F. AirPressureLoads—Selectbasedonprojectrequirements.SeedetailsinthisbrochureforuSgshaftwall

systemdata.

G. DeflectionLimit—Selectbasedonprojectrequirements.SeedetailsinthisbrochureforuSgshaftwall

systemdata.

H. STCRating—Selectbasedonprojectrequirements.

I. HardenedShafts—Whererequiredbycode,forbuildingsclassifiedashigh-risebuildings,specialprovisions

mayberequired.

1.6 A. ProductandSystemData–SubmitsystemfolderSA926,whichcanbedownloadedatusg.com.Submittals B. Submitcertificationofmanufacturercompliancewithfireandsoundrequirementsindicated.

C. Fireratingcomplianceshallincludeverificationofcompatibilitywithlabeledelevatordoorframeinstallationandtest

verificationofcallboxandsimilarpenetrations.


Application Guide Specifications



1.7 A. Delivermaterialsintheiroriginalunopenedpackagesbearingmanufactureridentification.Delivery,Storage B. Protectmaterialsfromwettinganddamagefromweather,directsunlight,surfacecontamination,corrosion,constructionandHandling

trafficandothercauses.ofMaterials C. Warning:StoreallSheetrockgypsumpanelsflat.Panelsareheavyandcanfallover,causingseriousinjuryordeath.

Donotmoveunlessauthorized.

1.8 A. Allmaterialsshallbesuitablyprotectedfromtheweatherduringinstallationtopreventdamagetotheshaftwall.ProjectConditions B. Installgypsumpanelsfollowingenvironmentalconditions,roomtemperaturesandventilationspecifiedintheUSG

Gypsum Construction Handbook.

1.9 A. ProtectuSgshaftwallsystemandcomponentsfrommoisturebefore,duringandafterinstallation.QualityAssurance Eliminatesourcesofmoistureimmediately.

B. Fire-ResistanceRatedAssemblies:ProvideULDesignNumber(e.g.,U415)forbasicsystems.

C. Sound-RatedAssemblies(STC)—Providesound-ratedsystemwhosematerialsandconstructioncomplywith

requirementsofASTME90andareclassifiedaccordingtoASTME413byaqualifiedtestingagency.

D. PreinstallationConference–Conductconferenceatprojectsite.Reviewmethodsandproceduresforworkrelatedto

uSgshaftwallsystemassemblies.

Part 2: Products

2.1 A. SupplymaterialsmanufacturedbyorfortheUnitedStatesGypsumCompanythatcomplywithrequirementsofManufacturer fire-resistanceratedassembliesindicatedinSystemFolderSA926.

B. BasisofDesign—uSgshaftwallsystem

2.2 A. GypsumLinerPanels—ASTMC1396,1"Sheetrockgypsumlinerpanels,100%recycledgreenfaceandbackMaterials paper,bevelededge,24"wide,lengthsasrequired.StampedwithULClassificationlabeldocumentingULClassifications

forfireresistance,surfaceburningcharacteristics,andnoncombustibility.Panelsshouldalsobeidentifiedwiththe

followinglanguage:“Sheetrockbrandgypsumlinerpanel,aComponentofUnitedStatesGypsumCompanyFire

RatedSystems.”

B. Sheetrock Mold toughGypsumLinerPanels—ASTMC1396,1SheetrockMold toughgypsumlinerpanels,100%

recycledbluefaceandbackpaper,bevelededge,24"wide,lengthsasrequired.StampedwithULClassificationlabel

documentingULClassificationsforfireresistance,surfaceburningcharacteristics,andnoncombustibility.Panelsshould

alsobeidentifiedwiththefollowinglanguage:“SheetrockbrandMold toughgypsumlinerpanel,aComponentofUnited

StatesGypsumCompanyFireRatedSystems.”

C. SheetrockGlass-MatLinerPanels—ASTMC1658,1"Sheetrock glass-matlinerpanels,moisture-andmold-

resistantgypsumcoreencasedinamoisture-andmold-resistantglassmatonbothsides,24"wide,lengths

asrequired.StampedwithULClassificationlabeldocumentingULClassificationsforfireresistance,surface

burningcharacteristicsandnoncombustibility.Panelsshouldalsobeidentifiedwiththefollowinglanguage:

“Sheetrockglass-matlinerpanel,aComponentofUnitedStatesGypsumCompanyFireRatedSystems.”


D. GypsumWallboard—ASTMC1396,(1/2")(5/8")(3/4")(selectthickness),4wide,taperededge,Sheetrockgypsum

panels,(FirecodeCore)(FirecodeCCore)(ultracodeCore)(Mold toughFirecodeCore),ASTMC1287(Fiberockaqua-

toughinteriorpanel)(Fiberockabuse-resistantinteriorpanels)(selectcoretype),lengthsasrequired.IdentifiedwithUL

Classificationlabel.

E. GypsumBaseforGypsumVeneerPlaster—ASTMC1396,(1/2")(5/8")(selectthickness),4wide,iMperialgypsum

base(FirecodeCore)(FirecodeCCore)(selectcoretype),lengthsasrequired.

F. CementBoard—ASTMC1325,durockcementboard,1/2"and5/8"thickness,48"widthx96"length.

G. GypsumWallboardandGypsumBaseJointTreatmentMaterials—selectaUSGInteriorFinishingSystem

(seeproductfolderJ1424).

H. Fasteners—ASTMC1002,Screws:(3/8")(1/2")Type(S)(S-12)panhead;5/8"Type S-12lowprofilehead;(1")

(1-5/8")(2-1/4")Type Sbuglehead.durocktilebackerscrewsforsteelframing:1-5/8".TypeGscrews:1-1/2".

I. MetalTrim—ASTMC1047,No.(200A)(200B)(401)(402)(701B)(801B).

J. Sheetrockpaperfacedmetalbeadandtrim.

K. Steelfurringchannels.

L. RC-1resilientchannelsorequivalent.

M. USGsteelC-Hstuds,(212CH-18)(212CH-34)(400CH-18)(400CH-34)(600CH-34)hot-dippedgalvanized,lengthsas

required(selectfromtables).

N. USGsteelE-studs,(400ES-34)(600ES-34)hot-dippedgalvanized,lengthsasrequired(selectfromtables).

O. USGsteelJ-runners,(212JR-23)(400JR-23)(600JR-23)(212JR-34)(400JR-34)(600JR-34)hot-dippedgalvanized.

P. Steelangleclips20gauge,(2"x2"x2")(2"x2"x4")(horizontalshaftwallonly).

Q. USGsteeljambstruts,(212JS-34)(400JS-34)(600JS-34)hot-dippedgalvanized.

R. Runnerfasteners,power-driventype,towithstandrequiredsingleshearandbearingforcewhendriventhroughstructural

headorbaseandwithoutexceedingallowabledesignstressinrunner,fastenerorstructuralsupport(obtainlocally).

S. Sheetrockacousticalsealant.

T. Soundbatts–(1")(1-1/2")(3").

U. Zinccontroljoint#093.

Part 3: Execution

3.1 Examinesubstratesandabuttingassemblieswithinstallerpresent.ProceedwithinstallationafterconditionsExamination determinedtobesatisfactory.

3.2 A. CheckthatsystemcomponentsareavailabletoconstructuSgshaftwallsystemPreparation –Sheetrockgypsumlinerpanels

–SheetrockMold toughgypsumlinerpanels

–Sheetrock glass-matlinerpanels

–SheetrockFirecode,FirecodeC,orultracodeCoregypsumpanels

–SheetrockMold toughFirecodeCore,FirecodeCCoreorultracodeCoregypsumpanels

–durockcementboard

–Fiberockabuse-resistantinteriorpanels



–Fiberockaqua-toughinteriorpanel

–iMperialFirecodeCoreorFirecodeCCoregypsumbase

–USGsteelframingcomponents(C-Hstuds,J-runner,E-studs,jambstruts)

B. Otherfire-resistiveelements/materials:CoordinateinstallationofuSgshaftwallassemblywithsprayed

fire-resistivematerialsandotherfire-resistiveelementssothatbothelementsremaincompleteandundamaged.

3.3 A. USGSteelFramingandSheetrockGypsumLinerPanelsShaftWall 1. PositionsteelJ-runnersatfloorandceilingwiththeshortlegtowardfinishsideofwall.Installation

2. Securelyattachrunnerstostructuralsupportswithpowder-actuatedfastenersatbothendsandmax.24"o.c.

3. Forattachmenttosteelframeconstruction,installfloorandceilingJ-runnersandJ-runnersorE-studsoncolumnsand

beamsbeforesteelisfireproofed.

4. Forattachmenttostructuralsteel,useZ-shapedstand-offclipssecuredtostructuralsteelbeforefireproofingapplication.

5. Removespray-fireproofingfromJ-runnersandE-studsbeforeinstallinggypsumlinerpanels.

6. Forwallheightslessthanmaximumavailablepanelheight,cutgypsumlinerpanelsnomorethan1"lessthanfloor-to-

ceilingheightanderectverticallybetweenJ-runners.

7. Whereshaftwallheightshaftexceedsmaximumavailablepanel-length,piecesofgypsumlinerpanelmustbebutted

togetheratfactory-cutends.

a. Positiongypsumlinerpanelendjointswithinupperandlowerthirdpointsofwall.

b. Staggerjointstopandbottominadjacentpanels.

c. Screwstudstorunnersonwallsover16'.

8. CutC-Hstuds3/8"tonotmorethan1/2"lessthanfloor-to-ceilingheight.

9. InstallC-Hstudsbetweengypsumlinerpanelswithlinersecurelyengaged.

10. Terminations:Installfull-lengthsteelE-studsorJ-runnersverticallyatT-intersections,corners,doorjambsandcolumns.

11. Openings:FramewithverticalE-studorJ-runneratverticaledges,horizontalJ-runneratheadandsill.Reinforceas

showninthisbrochure.Suitablyframeallopeningstomaintainstructuralsupportforwall.

12. ElevatorDoorFrames:Installjambstrutseachsideofelevatordoorframestoactasstrut-studs.

13. SteelHingedDoorFrames:Installfloor-to-ceilingsteelE-studseachsidetoactasstrut-studs.

14. Attachstrut-stud(see3.2.A.12or3.2.A.13)tofloorandceilingrunnerswithtwo3/8"Type S-12panheadscrews.

Attachstrut-studstojambanchorswith1/2"Type S-12screws.Oversteeldoors,installacut-to-lengthsectionof

J-Runnerandattachtostrut-studswith3/8"Type S-12screws.

B. ResilientChannels

1. Installresilientchannels(RC-1orequivalent)horizontallytofaceofstuds,within6"offloorandceiling.

2. Applyresilientchannelsamaximumof24"o.c.vertically(withopenfaceup).

3. Attachresilientchannelstostudswith3/8"Type Sscrewsdriventhroughholesinmountingflange.

4. Splicechannelbynestingdirectlyoverstud;screw-attachthroughbothflanges.Reinforcewithscrewsatbothendsofsplice.

5. Install1/2"x3"widecontinuousgypsumfillerstripstotopandbottomrunner.

6. Gypsumpanelapplicationwithresilientchannel:Applybaselayerhorizontallytoresilientchannelswithendjoints

staggered.Fastenwith1"Type Sscrews12"o.c.Applyfacelayerverticallywithjointsstaggered;attachtochannels

with1-5/8"Type Sscrews12"o.c.

C. SheetrockGypsumPanels

Gypsumpanelsandfasteningmustbeperthecorrespondingfire-resistancedesignnumberthatisthebasisofdesign.

SeethePerformanceSelectorinthisbrochureforspecificfire-resistancedesignnumbers.Thesystemreferencesbelow


correspondtothePerformanceSelectorfoundonpages14-15.

PerULDesignU415,Sheetrockgypsumpanelsmaybeappliedverticallyorhorizontallyinallofthesystems

below,exceptSystemF.Pleasenoteappropriatefastenerspacing.

SystemA—U415orU469,one-hourfire-resistancerating.Applyonelayer5/8"SheetrockFirecodeCoregypsum

panelstostudsandrunnerswith1"Type SorS-12(typical)screws.Fastenerspacing–Spacescrews12"o.c.for

verticalpanelapplication,8"o.c.forhorizontalpanelapplication.

SystemB—U415orU438,two-hourfire-resistancerating.Applytwolayersof1/2"SheetrockFirecodeCCore

gypsumpanels.Applybaselayertostudswith1"Type SorS-12(typical)screws.Spacescrews24"o.c.alongedges

andinthefieldofthepanelsforverticalapplication,16"o.c.forhorizontalapplication.Applyfacelayertostudsand

J-runnerswith1-5/8"Type SorS-12(typical)screws.Spacescrews12"alongtheedgesandinthefieldwhenapplied

vertically,8"o.c.whenappliedhorizontally.Staggeralljointsbetweenbaseandfacelayers.

SystemD—U415orU459,two-hourfire-resistancerating.Install1-1/2"therMaFiber™SAFBmineralwoolbattsin

studcavity.Applybaselayerof5/8"SheetrockFirecodeCCoregypsumpanelsusing1"Type SorS-12(typical)screws

spaced24"o.c.whenboardisappliedvertically.Spacescrews16"o.c.whenboardisappliedhorizontally.Applyface

layerof1/2"durockcementboardtoC-HStudswith1-5/8"durocktilebackerscrewsspaced8"o.c.

SystemE—U415orU467,two-hourfire-resistancerating.Applyonelayer1/2"SheetrockFirecodeCCoregypsum

panelstobothsidesofC-Hstuds.Fastenwith1"Type SorS-12(typical)screws.Spacescrews12"o.c.alongthe

edgesandinthefieldforverticalpanelapplication,8"o.c.forhorizontal.

SystemF—U415,two-hourfire-resistancerating.Applybaselayer1/2"SheetrockFirecodeCCoregypsumpanels

toresilientchannelswith1"Type SorS-12(typical)screwsspaced24"o.c.Staggerendjoints.Applyfacelayer1/2"

SheetrockFirecodeCCoregypsumpanelswith1-5/8"Type SorS-12(typical)screwsspaced12"o.c.

SystemG—U415,three-hourfire-resistancerating.Applytwolayersof5/8"SheetrockFirecodeCCoregypsum

panelsusingType SorS-12(typical)screwsspaced12"o.c.Applyfirstandsecond(inner)layersverticallyorhorizontally

overroomsideofsteelC-Hstuds.Whenappliedvertically,centerjointsbetweenpanelsoverstuds.Staggeralljointsa

minimum24".Whenpanelsareappliedhorizontally,staggerjointsaminimum12".Applythirdlayerof5/8"Sheetrock

FirecodeCCoregypsumpanelsverticallyorhorizontallyoverroomsideofsteelC-Hstudsusing2-1/4"Type SorS-12

(typical)screws.Spacescrews16"o.c.whenboardisappliedvertically,12"o.c.whenboardisappliedhorizontally.

SystemH—U415,three-hourfire-resistancerating.AlternatetoSystemGabove.Applythirdlayerof5/8"Sheetrock

FirecodeCCoregypsumpanelstoothersideofsteelC-Hstuds.

HorizontalAssemblies—two-hourfire-resistancerating.Installthreelayersof1/2"SheetrockFirecodeCCoregypsum

panelstohorizontallyinstalledC-Hand/orE-studs.Applythebaselayerwith1"Type SorS-12(typical)screwsspaced

24"o.c.Applythemid-layerinthesamemannerwithjointsoffset2'andattachedwith1-5/8"Type SorS-12(typical)

screwsspaced12"o.c.Applythefacelayerattachedwith2-1/4"Type SorS-12(typical)screwsspaced12"o.c.Place

facelayerendjointsbetweenstudsandsecurewith1-1/2"TypeGscrews8"o.c.

HorizontalStudShaftWall

1. AttachhorizontalJ-runnersatthefloorandtopofwallandverticalJ-runnerstostructuralsupportingelementswith

powder-actuatedfastenerslocatednotgreaterthan2"fromendsandspacednomorethan24"oncenterwithshort

legofJ-runnertowardthefinishsideofthewall.

2. Installgypsumlinerpanelshorizontallywithoutbuttjoints,whichlimitsthewidthofthewalltotheavailablelength

ofthelinerpanels.

3. Cutgypsumlinerpanels1"lessthanthewidthofthewall,andcenterthepanelsbetweentheverticalJ-runners.The

topedgeoftheuppermostlinerpaneltobecut1"lessthanthewallheighttoclearthe1"legofthetopJ-runner.

4. FreeedgeoftheuppermostandlowerlinerpanelsattachedtothelonglegofthetopandbottomJ-runnerswith1-5/8"

longTypeSorS-12steelscrewsspacednogreaterthan12"oncenters.

5. CutC-Hstudstomaintaina1/4"gapateachendofthewall.

6. InstallC-Hstudshorizontallywiththeopen“C”sectionofthestudsfacingdownandspaced24"oncenter.

7. Steelanglesshouldbeminimum20gauge,2"x2"x2"for4C-Hstuds,and2"x2"x4"for6C-Hstuds.Clipsare

centeredunderandtighttotheweboftheC-Hstuds,butnotattachedtothestuds.Clipsareattachedthroughtheweb

oftheverticalJ-runnerstotheunderlyingstructuralsupportingelementwithaminimumoftwo1/2"TypeS-12pan

headscrews.

8. Asanalternativetotheprecedingangleclip,fasteneachendofthehorizontalC-HstudtotheverticalJ-runnerlegs

with1/2"TypeS-12pan-headsteelscrewsonbothsidesofthewall.

9. EndreactionsofthehorizontalC-Hstudsmustbeaccommodatedbythestructuralelementrequiredattheendsofthe

wall,andmustbedeterminedbyalicensedprofessionalengineer.

10. Theallowableheightofthewallispredicatedonthestructuraladequacyoftheverticalstructuralelements.

D. SheetrockGypsumPanels(forverticalandhorizontalshaftwalls)

VentShaftEnclosure—U529,two-hourfire-resistancerating.Install1"x2"x25"ga.galvanizedsteelanglesasrun-

nersonfloor,ceilingsandpartitionends.Fastenrunnersoranglessecurelytostructurewithsuitablefastenersspaced

24"o.c.max.Install1/2"SheetrockFirecodeCCoregypsumpanelsvertically.Fastentoangleswith1"Type SorS-12

(typical)screwsspaced12"o.c.ApplySheetrock®durabond®setting-typeorSheetrock® eaSy Sand™lightweightsetting-

typejointcompoundonbacksideoflinerpanelandsheet-laminatetoshaft-sideboardwithverticaljointsoffset12"

frominnerboardjoints.Alsoscrewtoshaftsideboardwith1-1/2"longTypeGscrewsspaced24"o.c.inbothdirections.

Laminatefaceboardtolinerpanelsinsimilarmanner.Installfaceboardsverticallywithjointsoffset12"fromlinerpanel

joints.Applypressurewhenplacingboardstoensuregoodadhesivebondandfastentolinerpanelwith1-1/2"TypeG

screws,spaced24"o.c.

3.4 A. GypsumPanelJoints—FinishallfacelayerjointsandinternalangleswithaSheetrockinteriorfinishingAccessory systeminstalledaccordingtomanufacturer’sdirections.SeeproductfolderJ1424fordetailedrecommendations.Application

B. CornerBead—ReinforceallverticalandhorizontalexteriorcornerswithSheetrockpaperfacedbead.Seeproduct

folderJ1424fordetailedrecommendations.

C. MetalTrim—Whereshaftwallterminatesagainstmasonryorotherdissimilarmaterial,applySheetrockpaperfaced

beadandtrimoverfacelayeredge.



About the cover:

Project

Skybridge at One North Halsted

Chicago, IL

Recipient of the 2004 AIA Honor Award

Architects

Perkins & Will

Ralph Johnson, FAIA

Chicago, IL

Photographer

©James Steinkamp

Manufactured by United States Gypsum Company550 West Adams StreetChicago, IL 60661

SA926/rev. 5-10© 2010, United States Gypsum CompanyPrinted in U.S.A.

Product InformationSee usg.com for the most up-to-date product information. Metric SpecificationsUSG Corporation, through its operating subsidiaries, will provide metric conversions on its products and systems to help specifiers match metric design sizes. In addition, some products are available in metric dimensions from selected manufacturing plants. Refer to SA100, Fire-Resistant Assemblies, for additional information and a Table of Metric Equivalents.TrademarksThe following trademarks used herein are owned by United States Gypsum or a related company: AquA-Tough, Dur-A-BeAD, DurABonD, Durock, eAsy sAnD, FiBerock, FirecoDe, imperiAl, molD Tough, plus 3, rc-1, sheeTrock, TuFF-hiDe, ulTrAcoDe, USG. Type s and S-12 are trademarks of ITW buildex. ThermAFiBer is a trade-mark of ThermAFiBer llc. LEED is a registered trademark of U.S. Green Building Council.

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 instruc-tions or for other than the intended use. Our liability is expressly limited to replace-ment 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.Note All products described here may not be available in all geographic markets. Consult your local sales office or representative for information.Safety First!Follow good safety and industrial 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 products before specification and/or installation.

Websites

usg.comusgdesignstudio.comTechnical Service

800 USG.4YOU

Samples/Literature E-mail

[email protected]

Samples/Literature Fax

888 874.2348

Customer Service

800 950.3839