AS2047—1999

AS2047

(IncorporatingAmendmentNos1and2)

AustralianStandard?

BuildingCodeofAustraliaprimaryreferencedStandard

Windowsinbuildings—Selectionandinstallation

ThisAustralianStandardwaspreparedbyCommitteeBD/21,Windows.ItwasapprovedonbehalfoftheCouncilofStandardsAustraliaon30April1999andpublishedon5June1999.

ThefollowinginterestsarerepresentedonCommitteeBD/21:ArchitecturalAluminiumFabricatorsAssociationAustralianAluminiumCouncil

AustralianBuildingCodesBoard

ConstructionIndustryEngineeringServicesGroupCSIROBuilding,ConstructionandEngineering

FlatGlassandAluminiumAssociationofQueenslandFlatGlassCouncilofAustralia

HousingIndustryAssociationInstitutionofEngineersAustraliaMasterBuildersAustralia

MetalTradesIndustryAssociationofAustraliaNationalAssociationofTestingAuthoritiesAustraliaPlasticsandChemicalsIndustriesAssociationResidentialWindowAssociation

UniversityofNewSouthWales

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ThisStandardwasissuedindraftformforcommentasDR98349.

AS2047—1999

(IncorporatingAmendmentNos1and2)

AustralianStandard?

Windowsinbuildings—Selectionandinstallation

OriginatedinpartaspartofSAAInt.318—1951.FinaleditionAS2147—1996andAS2147.2—1996.

AS2047.1—1996andAS2047.2—1996revised,

amalgamatedandredesignatedAS2047—1999.ReissuedincorporatingAmendmentNo.1(January2001).ReissuedincorporatingAmendmentNo.2(June2001).

COPYRIGHT

?StandardsAustraliaInternational

Allrightsarereserved.Nopartofthisworkmaybereproducedorcopiedinanyformorbyanymeans,electronicormechanical,includingphotocopying,withoutthewrittenpermissionofthepublisher.

PublishedbyStandardsAustraliaInternationalLtdGPOBox5420,Sydney,NSW2001,Australia

ISBN0733727204

AS2047—1999

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AS2047—1999

PREFACE

ThisStandardwaspreparedbytheJointStandardsAustralia/StandardsNewZealandCommitteeBD/21,Windows,tosupersede,AS2047.1—1996,Windowsinbuildings,Partl:SpecificationformaterialsandperformanceandAS2047.2—1996,Windowsinbuildings—Part2:Construction,installationandmaintenance.Afterallowingsufficienttimeforadjustment(nominally12monthsfrompublication),thesupersededdocumentswillbewithdrawn.

ThisStandardincorporatesAmendmentNo.l(January200l)andAmendmentNo.2(June200l).ThechangesarisingfromtheAmendmentsareindicatedinthetextbyamarginalbarandamendmentnumberagainsttheclause,note,table,figure,orpartthereofaffected.

ThisStandardistheresultofaconsensusamongAustralianandNewZealandrepresentativesontheJointCommitteetoproduceitasanAustralianStandard.

TheobjectiveofthisStandardistoprovidewindowdesignersandmanufacturerswithagenericwindowcode,settingouttheperformancerequirementsandspecificationsinthedesignandmanufactureofallwindows,regardlessofmaterials.

ThisStandardhasbeenrevisedtomakeitsuitableforreferenceintheBuildingCodeofAustralia(BCA)asaStandardforregulatoryreference.

Thewindowratingsystemisasimplifiedsystemandwindowsspecificallydesignedforcornershavebeenomitted(seeAppendixA).

Theeffectsofatmosphericenvironments(corrosionandweathering)onmaterialsusedinwindowassembliesiscurrentlybeingconsideredbytheCommitteemembersforimprovementandinclusioninthenextrevision.

InthisStandard,statementexpressedinmandatorytermsinnotestotablesaredeemedtobeanintegralpartoftheStandard.

Theterm‘informative’hasbeenusedinthisStandardtodefinetheapplicationoftheappendixtowhichitapplies.An‘informative’appendixisonlyforinformationandguidance.

CONTENTS

Page

SECTION1SCOPEANDGENERAL

SCOPE 5

APPLICATION 6

REFERENCEDDOCUMENTS 6

DEFINITIONS 6

SECTION2PERFORMANCE

GENERAL 8

ATMOSPHERICENVIRONMENTS 8

WINDOWPERFORMANCE 8

VERIFICATIONOFSMALLERORLARGERSIZEPRODUCTS 13

USEANDRATINGOFWINDOWCOUPLINGSYSTEMS 14

SECTION3FRAMINGANDFINISHES

ALUMINIUMWINDOWS 15

TIMBERWINDOWS 16

UNPLASTICIZEDPVC(UPVC)WINDOWS 19

WINDOWSOFOTHERMATERIALS 19

SECTION4GLAZING

GENERAL 21

GLASS 21

GLAZINGMATERIALS 21

SECTION5COMPONENTS

HARDWARE 22

FASTENERS 22

WEATHERPROOFING 22

SECURITY 22

ANCHORINGDEVICES 22

SECTION6CONSTRUCTION

GENERAL 24

TOLERANCES 24

JOINTS 24

GLAZING 24

REVEALLININGS 24

FLASHINGS 24

SECTION7INSTALLATION

WINDOWSELECTION 25

INSTALLATION 25

THERMALANDSTRUCTURALMOVEMENT 25

ON-SITECARE 25

Page

SECTION8LABELLINGANDCERTIFICATE

8.1 GENERAL..............................................

26

8.2 LABELLING.............................................

26

8.3 CERTIFICATE...........................................

26

APPENDICES

A

GUIDETODESIGNWINDPRESSURE...........................

27

B

MEANSFORDEMONSTRATINGCOMPLIANCEWITHTHISSTANDARD

30

C

REFERENCEDDOCUMENTS..................................

32

D

NOMINATIONOFWINDOWRATINGSANDDESIGNWINDPRESSURE.

34

E

SURFACEFINISHFORALUMINIUM...........................

35

F

ON-SITECARE............................................

37

A1

G

GENERICTIMBERWINDOWS................................

38

A2

H

GENERICWINDOWSTESTRESULTS...........................

55

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AS2047—1999

AS2047—1999

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?StandardsAustralia

?StandardsAustralia

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STANDARDSAUSTRALIA

AustralianStandard

Windowsinbuildings—Selectionandinstallation

SECTION 1 SCOPE AND GENERAL

SCOPE ThisStandardspecifiesrequirements,materials,construction,installationandglazingfor—

windows;

slidingglazeddoors;

A1 (c) adjustablelouvres;

shopfronts;and

windowwallswithone-pieceframingelements.

NOTE:Windowwallsdonotincludecurtainwallsusingstackedorverticallysplicedframingsystems,manufacturedfromanymaterialandinstalledinexternalwallsofallclassesofbuildings.

Throughoutthisstandardtheterm‘window(s)’meanswindowofanytype,includinglouvre(s)andslidingdoor(s).

NOTES:

Thewindowratings,orclassifications,differfrompreviousglassandwindowStandardsduetothemoreaccurateevaluationoftheeffectofwindconditions.TheyarebasedoneitherAS1170.2,orthespecificwindloadingcodedevelopedforhousing,i.e.AS4055.

SeeAppendixAforinformationonwindloadsapplicabletowindowscoveredbythisStandard.

SeeAppendixBforalternativemeansofdemonstratingcompliancewiththisStandard.

Prefabricatedbaywindowsthatincorporateslopedglassareclassifiedaswindowsinexternalwalls.

RefertoAS/NZS4284forperformancespecificationofbuildingfacade.ConformancetotherequirementsinAS/NZS4284willbedeemedtosatisfytherequirementsofthisStandard.However,slidingwindowsashesordoorswillrequiretheoperatingforcetestinaccordancewithAS4420.3.

A1, 6ThefollowingarenotcoveredbythisStandard:

A2 (a)Hingeddoors,includingFrenchandbi-folddoors.

Revolvingglazeddoors.

Fixedlouvres.

Skylightsandrooflightsandwindowsinotherthantheverticalplane.

Windowsingreenhousesandagriculturalbuildings.

Slidingdoorswithoutframessuchasinternaldoorsandshopfrontdoors.

Windowsconstructedonsiteandarchitecturalone-offwindows,whicharenotdesigntested.

Second-handwindows,re-usedwindows,replacementwindows,orrecycledwindows.

Heritagewindows,forheritagebuildingsasdefinedbytherelevantStateorTerritoryauthority.

APPLICATIONThisStandardwillbereferencedintheBuildingCodeofAustraliabywayofBCAAmendmentNo.5tobepublishedby1July1999.

REFERENCEDDOCUMENTSThedocumentsreferredtointhisStandardarelistedinAppendixC.

DEFINITIONSForthepurposeofthisStandard,thedefinitionsgiveninAS\NZS4491andthosebelowapply.

Curtainwall—anon-load-bearingwindowwallthatisnotapanelwall.

Door—aslidingsashofasizesuitableforuseasaccessthroughwalls.

Fenestration—thearrangementofwindowsandotheropeningsontheexternalwallsofbuildings,especiallythefacade.

Fin—apieceofglasspositionedsuchastoprovidelateralsupport.

Fixing—anyitemthatisusedtosecuremembersofawindowassemblytoeachother,tosecureanitemofhardwaretoawindowmember,ortosecureacompletedwindowassemblyintothebuildingstructure.

Flashing—animperviousmembraneinstalledinsuchamannerastopreventingressofwaterintothebuilding.

Frame—thatpartofawindowassemblysurroundingthesashesorfixedglazing.Itisanassemblymanufacturedfromtimber,metal,glass,orotherdurablematerialorcombinationsofmaterials,suchasglassfinsandstructuralsealantformingpartoftheassemblyofaglazedpanelandsupportingthefulllengthofalltheedgesoftheglass.

NOTE:Butt-jointedglasspanelsthatarenotinthesameplanecansatisfytherequirementsforframes.

Glass—ahard,brittle,amorphoussubstanceproducedbyfusionandusuallyconsistingofmutuallydissolvedsilicaorsilicatesthatalsocontainsodaandlime.Itmaybetransparent,translucentoropaque.

Glazingbar—amemberthatisaddedtoastandardwindowconstructiontochangetheappearanceofthewindow.Itcanbeintheforminwhichtheglassisglazed,clipped,orstuckontoeitherorbothfacesoftheglass.

Glazinggasket—plasticorsyntheticrubbermembers,usedbetweentheglassandtheframeortheglassandthebead.

Hardware—equipmentusedintheopening,operating,closing,lockingandstoppingofsashes.

Head—thetophorizontalframingmemberofawindowassembly.

Jamb—averticalsideframingmember.

Light—seewindowlight.

Louvre—awindowunitcomprisingaseriesofbladesofglass,orothermaterial,lappingeachother.

Meetingstiles—verticalintermediatesashmembersthatmeetwhenthewindowisclosedsuchthattheycombinetoactinunison.

Meetingrails—horizontalintermediatesashmembersthatmeetwhenthewindowisclosedsuchthattheycombinetoactinunison

Mullion—averticalintermediateframingmember.

Multi-lightwindow—awindowincorporatingmorethanoneopeningorfixedlight,orboth,withinoneperimeterframe,aslowlights,highlightsorsidelights.

Newton—theforcewhich,whenappliedtoabodyhavingamassofonekilogram,causesanaccelerationofonemetrepersecondsquaredinthedirectionofapplicationoftheforce.

Panelwall—anon-load-bearingwindowwallthatiswhollysupportedateachstorey.

Pascal(Pa)—thepressureorstressthatariseswhenaforceofonenewtonisapplieduniformlyoveranareaofonesquaremetre.

Reveal—thevisiblepartofeachsideofawindowopeningnotcoveredbytheframe,ortherecessbetweentheframeandthefaceofthewall.

Sash—theseparateframe,toawindow,carryingtheglass.Itmaybefixed(inoperable)ormovable(operable).

A11.4.25 Sill—thebottomhorizontalframingmemberofawindowassembly.

Stile,sash—averticalsidememberofasash.

Structuralmembers—theelements,includingmullions,transoms,meetingrails,andmeetingstiles,thatperformthefunctionoftransferringloadstotheperimeterframe.

NOTE:Glazingbars,awningandcasementsashstilesandrailsarenotconsideredstructural

A1 membersforhousing;however,theyareconsideredstructuralmembersforresidentialandcommercialbuildings.

Transom—ahorizontalintermediateframingmemberofawindowassembly.

Weatherseal—amaterialincludedinawindowassemblytoreducetheairinfiltrationorimproveresistancetowaterpenetration.

Wind—displacementofparallelmemberswithrespecttooneanother.

Windowassembly—acompleteunitcomprisingframe,couplings,sashes,glazinginfillpanelsandhardware.

Windowlight—asinglepanelorglazinginawindowassembly.

Windowrating—aclassificationsystemprovidingforwindowstobetestedtodeterminetheirlevelofperformanceforstrengthandweatherproofness.Windowratingsforhousingareexpressedinwindclassificationterms(seeTable2.1),andwindowratingsforbuildingsotherthanhousingareexpressedinpermissibleorlimitstatedesignwindpressureterms.

Windowwall—aseriesofmulti-lightwindows,generallyspanningfromfloortoceiling,andoftencontinuoushorizontally.

SECTION 2 PERFORMANCE

GENERALThisSectiondetailsperformancecriteriaforwindowassembliesthatareclassifiedbyaratingsystemforhousing,andbydesignwindpressuresforresidentialandcommercialbuildings.

NOTES:

TheperformancelevelsofwindowsgiveninthisSectionaretheresultofmanyyearsoftestingunitsinlaboratoriesandtheevaluationofbuildingsitesafterhighwindsandcyclonesinvariousregionsofAustralia.

Thewindowratings,orclassifications,differfrompreviousglassandwindowStandardsduetothemoreaccurateevaluationoftheeffectofthesewindconditions.TheyarebasedoneitherAS1170.2,orthespecificwindloadingcodedevelopedforhousing,i.e.AS4055.

A12.1.1GenerictimberwindowsWindowsmadetothedetailsinAppendixGaredeemedtocomplywiththeappropriatestructuralperformanceandwaterpenetrationrequirementsofClause2.3.

NOTE:TheobjectiveofincludingthegenerictimberwindowsintheStandard,asanacceptablealternativetoindividualtestingofspecificfabricatorproducts,istoenablesmalljoineriestomanufacturewindowstothegenericdetailshowninAppendixG.

ATMOSPHERICENVIRONMENTSMaterialsshallbecompatiblewiththeatmosphericconditionsofthesite.

NOTE:Corrosionandweatheringofmaterialsusedinwindowassembliescanoccurinatmosphericenvironmentswherethematerialsareincompatiblewiththeenvironmentandotherwindowassemblymaterials,andwithotherbuildingmaterials.

WINDOWPERFORMANCE

Housing

A1GeneralInthisStandard,housingisdefinedasClass1buildingsandClass10buildings,asdescribedintheBuildingCodeofAustralia,andisgovernedbythelimitationsspecifiedinAS4055,exceptthatwindowsinClass10buildingsarenotrequiredtopasstheairinfiltrationandwaterpenetrationrequirementsofthisStandard.

WindowratingsThefollowingshallapply:

WindowassembliesshallberatedasdeterminedinTable2.1andbyachievingthetestresultsdetailedinClausestototheappropriatetestinAS4420,Parts2to6.

Thesupportingmembersshallhavesufficientthicknessofmaterialandstrengthtoensuretheperformanceofthewindow-operatinghardware.

TABLE 2.1

WINDOWRATINGSFORHOUSING

Windowrating

Serviceabilitydesignwindpressure,Pa

N1

500

N2

700

N3

1000

N4

1500

N5

2200

N6

3000

NOTE:Forcyclonicregions,i.e.regionsCandD,thedesignwindpressureshallbeinaccordancewithAS1170.2.

Deflection/spanratioWindowassembliesforhousingshallbesubjectedtothedeflectiontestinaccordancewithAS4420.2.ThetestpressureshallbethedesignwindpressureasspecifiedinTable2.1.Nostructuralmembersinacompletelyassembledandglazedwindowshalldeflectbyanamountgreaterthanspan/150whentestedattheserviceabilitydesignwindpressure.

A1NOTE:Glazingbars,awningandcasementsashstilesandrailsarenotmembersthatrequiredeflectiontests;however,theyshouldcomplywiththeultimatestrengthtestrequirements.

OperatingforcetestWindowsforhousingshallbesubjectedtotheoperatingforcetestinaccordancewithAS4420.3.ThetestforceshallbenotgreaterthanthevalueforwindowsordoorsgiveninTable2.2.

TABLE 2.2OPERATINGFORCEFORTEST

Newtons

Force

Slidingwindowtype

Slidingdoors

Horizontal

Vertical

Toinitiatemovement

110

200

180

Tosustainmovement

90

160

110

A1AirinfiltrationWindowsforClass1buildingsshallbesubjectedtotheairinfiltrationtestinaccordancewithAS4420.4andundereitherofthetestpressuresspecifiedinTable2.3.TheairinfiltrationshallnotexceedthevaluegiveninTable2.3.

A1 TABLE 2.3

MAXIMUMAIRINFILTRATION

Buildingtypeorwindowtype

Pressuredirection

Maximumairinfiltration,L/sm2

Testpressure75Pa

Testpressure150Pa

Airconditioned

Positive,negative

1.0

1.6

Non-airconditioned

Positive

5.0

8.0

Louvrewindow

Positive

20.0

Notapplicable

Adjustablelouvres,residentialandcommercialbuildings

Positive

20.0

32.0

NOTE:ReportsrelatingtotestscarriedoutunderearliereditionsofAS2047remainvalid.ReportsrelatingtotestscarriedoutafterthedateofanamendmenttoaStandardshouldrelatetotheamendedStandard.

A1WaterpenetrationWindowsforClass1buildingsshallbesubjectedtothewaterpenetrationresistancetestinaccordancewithAS4420.5,underthetestpressuresspecifiedinTable2.4.Duringandatthecompletionofthetestthereshallhavebeennopenetrationofuncontrolledwater.Uncontrolledwaterisdefinedas—

waterthatisnotcontainedinapurpose-builtdrainagearea;

waterthatwetsorislikelytowetinsulation,fixturesandfinishes,revealliningsorwindowfurnishingsbeyondthewindowframe;or

waterthatliesontransoms,rails,sills,etc.,whichhasnodesignedmeansofescapetotheoutsideoftheproductviathedrainagesystem.

Acceptablewaterpenetrationisnotdeemedafailureif—

minorsplashingoccursduetoairinfiltration,within1minafterchangeofpressure;

minor,intermittentleakageontheindoorsideofopenablesashes,whichiscontainedonsashgaskets,silltracksandthresholdsthatarepartofadrainagesystemthatallowswatertoflowtotheoutsideoftheproductatcessationofthetest(constantstreamsandregulardrippingwouldberegardedasfailure);or

waterrunningdowntheindoorfaceoflouvres,whichiscompletelycontainedwithinapurpose-builtdrainagearea.

A1 TABLE 2.4

WATERPENETRATIONRESISTANCETESTPRESSURES

Windowratings

Waterpenetrationresistancetestpressure,Pa(seeNote)

Allwindowsexceptajustablelouvres

Adjustablelouvrewindows

N1

150

150

N2

150

150

N3,C1

150

150

N4,C2

200

200

N5,C3

300

200

N6,C4

450

200

NOTE:Waterpenetrationresistancetestpressuresarearbitrarilychosen,consideringthemethodoftestandshallbeinpositivedirectiononly.

UltimatestrengthWindowsforhousingshallnotcollapsewhensubjectedtotheultimatestrengthtestinaccordancewithAS4420.6.‘Collapse’shallmeananyone,oranycombination,ofthefollowing:

A1(a) Failureordislodgmentofanyglazing.

Dislodgmentofaframeoranypartofaframe.

Removalofalight,eitherwithorwithoutitsframingsash,fromaframe.

Lossofsupportofaframe,suchaswhenitisunstableinitsopeninginthebuildingstructure.

Failureofanysash,lockingdevice,fastenerorsupportingstay,allowinganopeninglighttoopen.

ThetestpressureshallbenotlessthanthevaluegiveninTable2.5.

TABLE 2.5

ULTIMATESTRENGTHTESTPRESSURES

Windowratings

Ultimatestrengthtestpressure,Pa

N1

700

N2

1000

N3

1500

N4

2300

N5

3300

N6

4500

NOTE:Forcyclonicregions,i.e.regionsCandD,thedesignwindpressureshallbeinaccordancewithAS1170.2.

Residentialbuildings

General ThisClausecoversresidentialbuildingsofClass2,Class3andClass4partsofbuildingsasdescribedintheBuildingCodeofAustralia,andClass1buildingsoutsidethelimitationsspecifiedinAS4055.

DesignwindpressureThedesignwindpressureforserviceabilitylimitstateandultimatelimitstate,shallbedeterminedinaccordancewithAS1170.2.Alllocalpressurefactorsandinternalpressurecoefficientsrelevanttothelocationofthewindowonthebuildingshallbeconsidered.

NOTE:AguidetodesignwindpressureisgiveninAppendixA.

Deflection/spanratioWindowsshallbesubjectedtothedeflectiontestinaccordancewithAS4420.2.ThetestpressureshallbethedesignwindpressuresdeterminedinClause.Nostructuralmembersinacompletelyassembledandglazedwindowshalldeflectbyanamountgreaterthanspan/180,whentestedattheserviceabilitylimitstatedesignwindpressure.

OperatingforcetestWindowsshallbesubjectedtotheoperatingforcetestinaccordancewithAS4420.3.ThetestforceshallbenotgreaterthanthevaluegiveninTable2.2.

AirinfiltrationWindowsshallbesubjectedtotheairinfiltrationtestinaccordancewithAS4420.4.TheairinfiltrationshallnotexceedtheamountgiveninTable2.3.

WaterpenetrationWindowsshallbesubjectedtothewaterpenetrationresistancetestinaccordancewithAS4420.5.Thetestpressureshallbecalculatedas30%ofthepositiveserviceabilitylimitstatedesignwindpressure,asdeterminedinClause,butnotlessthan150Pa,andinpositivedirectiononly.Duringthetest

A1thereshallbenopenetrationofuncontrolledwater,asspecifiedinClause.

UltimatestrengthWindowsshallnotcollapsewhensubjectedtotheultimatestrengthtestinaccordancewithAS4420.6.‘Collapse’shallbeasspecifiedinClause.

ThetestpressureshallbenotlessthantheultimatelimitstatedesignwindpressuredeterminedinaccordancewithAS1170.2.Alllocalpressurefactorsandinternalpressurecoefficientsrelevanttothelocationofthewindowonthebuildingshallbeconsidered.

Commercialbuildings

GeneralThisClausecoverscommercialbuildingsofClasses5,6,7,8and9,asdescribedintheBuildingCodeofAustralia.

DesignwindpressureThedesignwindpressureforserviceabilitylimitstateandultimatelimitstate,shallbedeterminedinaccordancewithAS1170.2.Alllocalpressurefactorsandinternalpressurecoefficientsrelevanttothelocationofthewindowonthebuildingshallbeconsidered.

NOTE:AguidetodesignwindpressureisgiveninAppendixA.

Deflection/spanratioWindowsshallbesubjectedtothedeflectiontestinaccordancewithAS4420.2.ThetestpressureshallbethedesignwindpressuredeterminedinClause.Nostructuralmembersinacompletelyassembledandglazedwindowshalldeflectbyanamountgreaterthanspan/250,whentestedattheserviceabilitylimitstatedesignwindpressure.

OperatingforcetestWindowsshallbesubjectedtotheoperatingforcetestinaccordancewithAS4420.3.ThetestforceshallbenotgreaterthanthevaluegiveninTable2.2.

AirinfiltrationWindowsshallbesubjectedtotheairinfiltrationtestinaccordancewithAS4420.4.TheairinfiltrationshallnotexceedtheamountgiveninTable2.3.

WaterpenetrationWindowsshallbesubjectedtothewaterpenetrationresistancetestinaccordancewithAS4420.5.Thetestpressureshallbecalculatedas30%

A1ofthepositiveserviceabilitylimitstatedesignwindpressure,asdeterminedinClause,butnotlessthan150Pa,andinpositivedirectiononly.Duringthetestthereshallbenopenetrationofuncontrolledwater,asspecifiedinClause.

NOTE:Whentestingawindowforwaterpenetration,whereinsulationisremovedinordertoobservetheindoorsideofthewindow,themanufacturershouldsupplydrawingsindicatingitsintendedlocationinorderthattheresultmaybedetermined.

UltimatestrengthWindowsshallnotcollapsewhensubjectedtotheultimatestrengthtestinaccordancewithAS4420.6.‘Collapse’shallbeasspecifiedinClause.

ThetestpressureshallbenotlessthantheultimatelimitstatedesignwindpressuredeterminedinaccordancewithAS1170.2.Alllocalpressurefactorsandinternalpressurecoefficientsrelevanttothelocationofthewindowonthebuildingshallbeconsidered.

VERIFICATIONOFSMALLERORLARGERSIZEPRODUCTSAS4420.1,generallyrequiresthetestsamplewindowtoberepresentativeinbothsizeandshapeofthelargeststandardassemblyintheproductrangeasspecifiedbythemanufacturer.Wherethesuppliedproductsarenotofthesamesizeasthoseverifiedbytesting,oneofthefollowingshallapply:

Smallersizeproducts(eithershorterornarrower,orboth),whichhavethesameconstruction(fenestration,sectionsandcomponents)asatestedproduct,shallassumethesamerating,providedtheyareinnowaylessfavourablydisposedandareglazedincompliancewithAS1288.

SmallersizeproductsasdescribedinItem(a)shallberatedatahigherdesignwindpressureratingthanthetestedproduct,providedthecalculationsofdeflectionandstressforallstructuralmemberstoarriveatthehigherratingarecertifiedusingtheactualtestdataforthestructuralmembersandprovidedtheyareinnowaylessfavourablydisposedandareglazedincompliancewithAS1288.

Largersizeproducts(eithertallerorwider,orboth),whichhavethesameconstruction(fenestration,sectionsandcomponents)asatestedproductinaccordancewithAS4420.1,shallassumethesameratingorlowerratingasthetestedproduct,providedthecalculationsofdeflectionandstressforallstructuralmemberstoarriveattheratingarecertifiedusingtheactualtestdataforthestructuralmembers,andprovidedtheyareinnowaylessfavourablydisposedandareglazedincompliancewithA