欧洲玻璃结构装配方法技术标准

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EuropeanOrganisationforTechnicalApprovalsEuropäischeOrganisationfürTechnischeZulassungenOrganisationEuropéennepourl’AgrémentTechnique

Part1:SUPPORTEDANDUNSUPPORTEDSYSTEMS

STRUCTURALSEALANTGLAZINGSYSTEMS(SSGS)

amendedOctober2001

GUIDELINEFOREUROPEANTECHNICALAPPROVAL

FOR

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EditionNovember1999

EOTA,Kunstlaan40AvenuedesArts,B-1040Brussels

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Tableofcontents-PART1

SECTIONONE:INTRODUCTION

Preliminaries 5

Legalbasis 5

StatusofETAGuidelines 5

Scope 6

ScopeofGuideline 6

UseCategories 8

Terminology 9

Commonterminologyandabbreviations 9

Particularterminology 12

SECTIONTWO:GUIDANCEFORTHEASSESSMENTOFFITNESSFORUSE 15

Requirements 15

Preamble 15

Economicallyreasonableworkinglife 15

Initialconsiderations 15

RelationbetweentheEssentialRequirementsandtheproductcharacteristics 16

ER1Mechanicalresistanceandstability 16

ER2Safetyincaseoffire 16

ER3Hygiene,healthandenvironment 16

ER4Safetyinuse 16

ER5Protectionagainstnoise 20

ER6Energyeconomyandheatretention 20

Durability 20

Accessoriesandancillaryproducts 20

Verificationsnecessaryincaseofinterchangeofcomponentsorsuppliers 21

Methodsofverification 22

Preamble 22

VerificationMethodsrelatedtotheEssentialRequirements. 22

ER1Mechanicalresistanceandstability 22

ER2Safetyincaseoffire 22

Reactiontofire 22

Resistancetofire 24

ER3Hygiene,Healthandtheenvironment 24

Performanceinrelationtoairpermeability,watertightness,windresistance 24

Testassembly 24

Airpermeability 25

Watertightnessunderstaticpressure 25

Releaseofdangeroussubstances 25

Dampness 25

ER4Safetyinuse 26

Initialmechanicalstrength 27

Tension,rupture 27

5.1.4.1.2.Shear,rupture 28

Residualmechanicalstrengthafterartificialageing 29

Immersioninwaterathightemperaturewithorwithoutsolarradiation 29

HumidityandNaClatmosphere 29

HumidityandSO2atmosphere 30

Facadecleaningproducts 30

Effectsofmaterialsincontact 30

Mechanicaldevices 33

Testonthemechanicalself-weightsupport 33

Testontheanchorageofthesealantsupportframetothefacadestructure 33

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5.1.4.3.3

Testsonretainingdevices

35

5.1.4.4

Testsonopeninglights

35

5.1.4.5

Impacttests

35

5.1.4.6

StructuralSealant-Physicalproperties

35

5.1.4.6.1

Gasinclusions

35

5.1.4.6.2

Elasticrecovery

36

5.1.4.6.3

Shrinkage

36

5.1.4.6.4.

Resistancetotearing

36

5.1.4.6.5

Mechanicalfatigue

37

5.1.4.6.6

U.V.resistanceofthesealant

37

5.1.4.6.7

Elasticmodulusofthesealant

37

5.1.4.6.8

Creepunderlongtermshearandtensileloading

38

5.1.4.7

Methodofcalculationofstructuralsealdimensions

39

5.1.4.8

Sillheights

40

5.1.4.9

Windresistance

40

5.1.4.10

Behaviourinfire

40

5.1.5

ER5Protectionagainstnoise-Acousticinsulation

40

5.1.6

Energyeconomyandheatretention

40

5.1.6.1

Thermalinsulation

40

5.1.6.2

Airpermeability

41

5.1.7

Durabilityaspects

41

5.2

Verification

methodsrelatedtotheidentificationoftheproducts

41

5.2.1

StructuralSealant

41

5.2.1.1

Specificmass

41

5.2.1.2

Hardness

41

5.2.1.3

Thermogravimetricanalysis

41

5.2.1.4

Colour

42

5.2.2

Anodisedaluminiumstructuraladhesionsurface

42

5.2.2.1

Alloysofaluminum

42

5.2.2.2

Characteristicsoftheanodising

42

5.2.2.2.1

Measurementofthethickness

42

5.2.2.2.2

Sealingtests

42

5.2.2.2.3

Measurementoftheadmittanceat20000Hz

42

5.2.2.3

Descriptionoftheprocess

42

5.2.2.3.1

Scouring

42

5.2.2.3.2

Anodising

42

5.2.2.3.3

Sealingoftheanodizedlayer

42

5.2.3

Glassadhesionsurface

43

5.2.3.1

Identificationofglass

43

5.2.3.2

Glassproducts

43

5.2.3.3

Coatedglass

43

5.2.3.3.1

Suitablecoatings

43

5.2.3.3.2

Evaluationofthesuitabilityofthebondingofcoatingsandtheirlayers

43

5.2.3.3.3.

Evaluationfromexistingtestreports

43

5.2.3.3.4

Evaluationbytesting

44

5.2.4

Stainlesssteeladhesionsurface

44

5.3 Verificationsnecessaryincaseofinterchangeofcomponentsorsuppliers 44

Assessingandjudgingthefitnessforuseofproductsforanintendeduse 46

Preamble 46

General-testresultstatisticalinterpretation 46

Hygiene,health&environment 52

Releaseofdangeroussubstances 52

Assumptionsunderwhichfitnessforuseistobeassessed 53

General 53

Designoftheworks 53

Executionoftheworks 53

Transportandstorage 53

Installation 54

General 54

Weathersealing 54

Maintenanceandrepair 55

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SECTIONTHREE:ATTESTATIONOFCONFORMITY

Evaluationofconformity 56

ECdecision 56

Responsibilities 57

Tasksforthemanufacturer 57

Factoryproductioncontrol 57

Testingofsamplestakenatthefactory 57

DeclarationofConformity(System2+) 57

Tasksforthemanufacturerortheapprovedbody-Initialtypetesting 57

Tasksfortheapprovedbody 57

Assessmentofthefactoryproductioncontrolsystem—initialinspectiononlyor

initialinspectionandcontinuoussurveillance. 57

Certification 57

Documentation 58

General 58

Detaileddocumentation 58

TheETA 58

Basicmanufacturingprocess 58

Productandmaterialsspecifications 58

TestplanaspartofFPC 58

ChecksonassembledSSGelements 62

ECconformitymarkingandinformation 63

SECTIONFOUR:ETACONTENT

ETAcontents 64

Performance 64

Specification 64

Dimensions 64

Componentsandaccessories 64

Dangeroussubstances 66

Additionalinformation 66

ContentoftheETAtechnicalfile, 66

Structuralsealant 66

Glass 66

Aluminiumandanodising 66

Weatherseal 66

Backerrod 67

Spacer 67

Settingandlocationblocks 67

Mechanicalself-weightsupport 67

Anchorageofthesealantsupportframeonthefacadestructure 67

Retainingdevice 67

Openinglighthardware 67

SSGkit 67

Stainlesssteel 67

Supplementaryinformationtobeprovidedtoapprovedbodies

(togetherwithacopyoftheETA)forthepurposesofevaluationofconformity 67

Dangeroussubstances

ANNEX1-STIFFNESS 69

ANNEX2-METHODOFCALCULATION 71

ANNEX3-REFERENCEDOCUMENTS 75

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SECTIONONE:INTRODUCTION

Preliminaries

Legalbasis

ThisguidelineforEuropeanTechnicalApprovalhasbeenestablishedinfullcompliancewiththeprovisionsoftheCouncilDirective89/106/EC(TheConstructionProductsDirective)andhasbeenestablishedtakingintoaccountthefollowingsteps:

issuingofthefinalmandatebytheEC :18April1996.

adoptionoftheGuidelinebyEOTA(Executivecommission) :2June1998.

endorsementofthedocumentbytheEC SCCopinionof:30June-1July1998.

ECletterof :24September1998.

ThisdocumentispublishedbytheMemberStatesintheirofficiallanguageorlanguagesaccordingtoArt11.3oftheCPD.

StatusofETAGuidelines

AnETAisoneofthetwomaintypesoftechnicalspecificationsinthesenseoftheECConstructionProductsDirective(89/106/EEC).ThatmeansthatMemberStatesshallpresumetheapprovedproductsfitfortheirintendeduse,iethattheyenableworksinwhichtheyareemployedtosatisfytheessentialrequirementsduringaneconomicallyreasonableworkinglife,providedthat:

theworksareproperlydesignedandbuilt

theconformityoftheproductswiththeETAhasbeenproperlyattested.

AnETAGuidelineisabasisforETAs,thatisabasisfortechnicalassessmentofthefitnessforuseforanintendeduse1.

ETAGuidelinesexpressthecommonunderstandingoftheapprovalbodiesoftheprovisionsoftheECConstructionProductsDirectiveandoftheInterpretativeDocumentswithregardtotheproductsandusesconcernedestablishedwithintheframeworkofamandategivenbytheECCommissionafterconsultingtheECStandingCommitteeforConstruction.

ETAGuidelinesarebindingfortheissuingofETAsoftheproductsconcernedforanintendedusewhenacceptedbytheECCommissionafterconsultationwiththeECStandingCommitteeforConstructionandpublishedbytheMemberStatesintheirofficiallanguageorlanguages.

TheapplicabilityandthesatisfactionofanETAGuidelineforaproductanditsintendedusehavetobeassessedinacasebycaseevaluationbyanauthorisedapprovalbody.

SatisfactionoftheprovisionsofanETAGuideline(examinations,testsandevaluations)leadstoapresumptionoffitnessforuseonlythroughthiscasebycaseevaluation.

ProductswhichareoutsideofthescopeofanETAGuidelinemaybeconsideredwhereappropriatethroughtheapprovedprocedurewithoutguidelinesaccordingtoArt.9.2oftheCPD.

TherequirementsinETAGuidelinesaresetoutintermsofobjectivesandofrelevantactionstobetakenintoaccount.ETAGuidelinesspecifyvaluesandcharacteristics,theconformitywithwhichcarriesthepresumptionthattherequirementssetoutaresatisfied,wheneverthestateoftheartpermitstodoso.TheETAGuidelinesmayindicatealternativepossibilitiesforthedemonstrationofthesatisfactionoftherequirements.

1AnETAGuidelineisnotinitselfatechnicalspecificationinthesenseoftheCPD.

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Scope

ScopeofGuideline

ThisGuidelinerelatestoStructuralSealantGlazingSystems(SSGS)foruseasfacadesandroofs,orpartsofthem,withglazingatanyanglebetweenverticaland7°abovehorizontal(seeFigures1,3and4).ThisPartoftheGuidelinecoversthegeneralrequirementsforsystemassessmentandthespecificrequirementsforsupported(typesIandII)andunsupported(typesIIIandIV)systems(seeFigure1),wherethestructuralsealadhesionsurfacesareglass,eitheruncoatedorwithaninorganiccoating,andanodisedaluminiumorstainlesssteel.Subsequentpartsofthedocumentwillcoverthespecificrequirementsfortheassessmentoftheuseofglasswithanorganiccoating(opacifier),theuseofaluminiumwithacoatingotherthananodising,andtheuseofthermalbreaksinSSGframingsystems.

SubsequentPartsoftheGuidelinearetobeusedtogether,asnecessary,andwiththisgeneraldocument,asindicated.

StructuralSealantGlazingSystemsinvolvethetechniqueofbondingglazingtoredistributeloadstothefacadestructureviaastructuralsealantandastructuralsealant-supportframe.

Thesystemsarenormallyputonthemarketasa“kit”ofcomponents(refECGuidancepaperC"ThetreatmentofkitsandsystemsundertheConstructionProductsDirective"),givingadesignerthechoiceofcomponentsrequiredforaparticularfacade.

TheETAwillgivedetailsofthecomponentsitcovers,tobeusedinaccordancewiththeETAholder'sdesignrulesandinstallationguide.Typically,thecomponentswillincludesomemanufacturedbytheETAholderandsomebyothermanufacturers.

ThisGuidelinecoverstheaspectsofperformanceofafacadeaffectedbytheincorporationoftheStructuralSealantGlazingSystemasshowninFigure4andallowsfortheoptionspossiblewithinthekit.Thekitcomponentsmayincludethemembersrequiredforthefacadestructure,butthesearenotcoveredbythisGuideline(membersindicatedbydashesinFigure4).Theywillhoweverneedtobetakenintoaccountinrelationtothepre-conditionsgiveninChapter7.

SSGScanbeconstructedinfourdifferentways,whicharedescribedbelowinTable1andshowninFigure1.Devicestoreducedangerintheeventofbondfailuremayberequiredbynationalregulations.

TABLE1-SSGStypes

TypeI: Mechanicaltransferoftheselfweightoftheinfilltothesealant-supportframeandthencetothestructure.Thestructuralsealtransfersallotheractions.Devicesareusedtoreducedangerintheeventofabondfailure.

TypeII: Mechanicaltransferoftheselfweightoftheinfilltothesealant-supportframeandthencetothestructure.Thestructuralsealtransfersallotheractionsandnodevicesareusedtoreducedangerintheeventofbondfailure.

TypeIII: Thestructuralsealtransfersallactionsincludingtheself-weightoftheinfilltothesealantsupportframeandthencetothestructure.Devicesareusedtoreducedangerintheeventofabondfailure.

TypeIV: Thestructuralsealtransfersallactions,includingself-weightoftheinfilltothesealant-supportframeandthencetothestructure.Nodevicesareusedtoreducedangerintheeventofbondfailure.

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Retainingdevicetoreducedangerincaseofbondfailure

TypeI

TypeII

Mechanicalself-weightsupport

Retainingdevicetoreducedangerincaseofbondfailure

TypeIII

TypeIV

Structuralsealantsupportframe

Figure1-SchematicexamplesofthedifferenttypesofSSGS

Currentunderstandingnecessitatesanumberofgeneralrestrictions:

thestructuralbondistobesiliconeintheformofalinearbead

thedesignmayincludediscontinuitiesinthestructuralbond,butnoedgemaybeentirelyfree;someedgesmaybemechanicallybeaded

thestructuralsealantistobefactoryapplied.

Induecourse,furtherpartsoftheGuidelinemaybeissuedtoreducetheselimitations.

Itisassumedthatsystemdesignerswillfollownormalgoodpracticeinrelationtosuchmattersasglasssupplycondition(cleanliness,freedomfromdefects,etc)andapplication(useofheat-strengthenedorlaminatedglass,etc,asrequired).ThesemattersarenotcoveredbythisGuidelineastheyareadequatelycoveredbycodesandstandards.However,thereareanumberofimportantrequirementswithadirectbearingonthedesignofSSGsystems.Thefollowinglist,thoughnotexhaustive,setsoutsomeoftheserequirements:

Machiningofglass(forexamplewhererequiredforfittingglazingsafetydevices)mayonlybecarriedoutbyand/orinagreementwiththeglassmanufacturer.

Glassshallbeselectedtoensureitwillsafelytransmitthewindloadtothestructuralsealantsupportframeviathestructuralsealantinaccordancewithnationaldesigncodes.

Structural-sealantadhesiononthreesurfacesisnotpermissible(seeFigure2).Adhesiontoaspacerinaninsulatingglassunitisnottobeconsideredasastructuralbond.

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1

2

3

Figure2-Structuraladhesiononthreesurfaces-notpermissible

Theangleshowstherangeofpermissibleinclinationabove7°(seeFigure3).

Figure3-Permissibleinclination

ThepresentspecificationsdonotapplytoacompositesystemwheretheinteriorpaneoftheIGUismechanicallyfastenedandtheexteriorpaneisretainedbystructuralsealant.

ThetypesIIIandIVSSGSareonlyapplicableforsingleglassunits.Forinsulatingglassunitsorlaminatedglass,eachpaneofglassmustbesupported(typeIorII).

Usecategories

ThespecificationofsomeSSGsystemsandtherelatedapproachtotheirassessmentnecessitatestheapplicationofaUseCategoryinrespectofthefollowingaspectofperformance.

Useatlowtemperature

Ifspecifiedbythemanufacturer,systemsmaybetestedatverylowtemperature(see5.1.4.1)toassesstheirsuitabilityforuseincoldregionssuchas,forexample,Nordiccountries.

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Terminology

Commonterminologyandabbreviations

Worksandproducts

Constructionworks(andpartsofworks)(oftensimplyreferredtoas“works”)(ID1.3.1)

Everythingthatisconstructedorresultsfromconstructionoperationsandisfixedtotheground.(Thiscoversbothbuildingandcivilengineeringworks,andbothstructuralandnonstructuralelements).

Constructionproducts(oftensimplyreferredtoas“products”)(ID1.3.2)

Productswhichareproducedforincorporationinapermanentmannerintheworksandplacedassuchonthemarket.(Thetermincludesmaterials,elements,componentsandprefabricatedsystemsorinstallations.)

Incorporation(ofproductsinworks)(ID1.3.2)

Incorporationofaproductinapermanentmannerintheworksmeansthat:

itsremovalreducestheperformancecapabilitiesoftheworks,and

thatthedismantlingorthereplacementoftheproductareoperationswhichinvolveconstructionactivities.

Intendeduse(ID1.3.4)

Role(s)thattheproductisintendedtoplayinthefulfilmentoftheessentialrequirements.

Execution(ETAG-format)

Usedinthisdocumenttocoveralltypesofincorporationtechniquessuchasinstallation,assembling,incorporationetc.

Performances

Fitnessforintendeduse(ofproducts)(CPD2.1)

Theproductshavesuchcharacteristicsthattheworksinwhichtheyareintendedtobeincorporated,assembled,appliedorinstalled,can,ifproperlydesignedandbuilt,satisfytheessentialrequirements.

(N.B.ThisdefinitioncoversonlytheintendedfitnessforintendeduseasfarasrelevantfortheCPD.)

Serviceability(ofworks)

Abilityoftheworkstofulfiltheirintendeduseandinparticulartheessentialrequirementsrelevantforthisuse.

Theproductsmustbesuitableforconstructionworkswhich(asawholeandintheirseparateparts)arefitfortheirintendeduse,subjecttonormalmaintenance,foraneconomicallyreasonableworkinglife.Therequirementsgenerallyconcernactionswhichareforeseeable(CPDAnnexI,Preamble).

Essentialrequirements(forworks)

Requirementsapplicabletoworks,whichmayinfluencethetechnicalcharacteristicsofaproduct,andaresetoutinobjectivesintheCPD,AnnexI(CPD,art.3.1).

Performance(ofworks,partsofworksorproducts)(ID1.3.7)

Thequantitativeexpression(value,grade,classorlevel)ofthebehaviouroftheworks,partsofworksoroftheproducts,foranactiontowhichitissubjectorwhichitgeneratesundertheintendedserviceconditions(works

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orpartsofworks)orintendeduseconditions(products).

Actions(onworksorpartsoftheworks)(ID1.3.6)

ServiceconditionsoftheworkswhichmayaffectthecomplianceoftheworkswiththeessentialrequirementsoftheDirectiveandwhicharebroughtaboutbyagents(mechanical,chemical,biological,thermalorelectro-mechanical)actingontheworksorpartsoftheworks.

Classesorlevels(foressentialrequirementsandforrelatedproductperformances)(ID1.2.1)

Aclassificationofproductperformance(s)expressedasarangeofrequirementlevelsoftheworks,determinedintheID'soraccordingtotheprocedureprovidedforinart.20.2aoftheCPD.

ETAGformat

Requirements(forworks)

Expressionandapplication,inmoredetailandintermsapplicabletothescopeoftheguideline,oftherelevantrequirementsoftheCPD(givenconcreteformintheID'sandfurtherspecifiedinthemandate),forworksorpartsoftheworks,takingintoaccountthedurabilityandserviceabilityoftheworks.

Methodsofverification(forproducts)

Verificationmethodsusedtodeterminetheperformanceoftheproductsinrelationtotherequirementsfortheworks(calculations,tests,engineeringknowledge,evaluationofsiteexperience,etc.)

Specifications(forproducts)

Transpositionoftherequirementsintopreciseandmeasurable(asfaraspossibleandproportionaltotheimportanceoftherisk)orqualitativeterms,relatedtotheproductsandtheirintendeduse.

Workinglife

Workinglife(ofworksorpartsoftheworks)(ID1.3.5(1))

Theperiodoftimeduringwhichtheperformancewillbemaintainedatalevelcompatiblewiththefulfilmentoftheessentialrequirements.

Workinglife(ofproducts)

Periodoftimeduringwhichtheperformanceoftheproductismaintained-underthecorrespondingserviceconditions-atalevelcompatiblewiththeintendeduseconditions.

Economicallyreasonableworkinglife(ID1.3.5(2))

Workinglifewhichtakesintoaccountallrelevantaspects,suchascostsofdesign,constructionanduse,costsarisingfromhindranceofuse,risksandconsequencesoffailureoftheworksduringitsworkinglifeandcostofinsurancecoveringtheserisks,plannedpartialrenewal,costsofinspections,maintenance,careandrepair,costsofoperationandadministration,ofdisposalandenvironmentalaspects.

Maintenance(ofworks)(ID1.3.3(1))

Asetofpreventiveandothermeasureswhichareappliedtotheworksinordertoenabletheworkstofulfilallitsfunctionsduringitsworkinglife.Thesemeasuresincludecleaning,servicing,repainting,repairing,replacingpartsoftheworkswhereneeded,etc.

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Normalmaintenance(ofworks)(ID1.3.3(2))

Maintenance,normallyincludinginspections,whichoccursatatimewhenthecostoftheinterventionwhichhastobemadeisnotdisproportionatetothevalueofthepartoftheworkconcerned,consequentialcosts(e.g.exploitation)beingtakenintoaccount.

Durability(ofproducts)

Abilityoftheproducttocontributetotheworkinglifeoftheworksbymaintainingitsperformance,underthecorrespondingserviceconditions,atalevelcompatiblewiththefulfilmentoftheessentialrequirementsbytheworks.

Conformity

Attestationofconformity(ofproducts)

ProvisionsandproceduresaslaiddownintheCPDandfixedaccordingtothedirective,aimingtoensurethat,withacceptableprobability,thespecifiedperformanceoftheproductisachievedbytheongoingproduction.

Identification(ofaproduct)

Productcharacteristicsandmethodsfortheirverification,allowingcomparisonbetweenagivenproductandtheonedescribedinthetechnicalspecification.

Abbreviations

AbbreviationsconcerningtheConstructionproductsdirectiveAC: Attestationofconformity

CEC: CommissionoftheEuropeanCommunities

CEN: Comitéeuropéendenormalisation(EuropeanCommitteeforStandardization)CPD: Constructionproductsdirective

EC: Europeancommunities

EFTA: EuropeanfreetradeassociationEN: EuropeanStandards

FPC: Factoryproductioncontrol

ID: InterpretativedocumentsoftheCPDISO: Internationalstandardisationorganisation

SCC: StandingcommitteeforconstructionoftheEC.

Abbreviationsconcerningapproval:

EOTA: EuropeanOrganisationforTechnicalApprovalsETA: EuropeanTechnicalApproval

ETAG: EuropeanTechnialApprovalGuidelineTB: EOTATechnicalBoard

UEAtc: UnionEuropéennepourl'Agrémenttechnique(EuropeanUnionofAgrément).

Generalabbreviations:IGU: Insulatingglassunit

SSGS: StructuralSealantGlazingSystemTC: TechnicalCommittee

WG: WorkingGroup.

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3.2Particularterminology:

TheterminologyisshowninFigure4-averticalsectionofasupportedsystem.Drainageisnotshown.

WORKS

Facadestructure STRUCTURALSEALANTGLAZINGSYSTEM

Figure4-StructuralSealantGlazingSystem-verticalsection(illustrationonlyforterminology)

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NumberscorrespondtonumbersinFigure4.

Anchorage

Anchorageofthestructuralsealantsupportframetothefacadestructure.

Backerrod

Continuouspreformedstriplimitingthedepthofaseal.

Bite

Thatdimensionofthestructuralsealmeasuredintheplaneofapanel.Thistermrefersalsotothesamedimensionofthehermeticsealofaninsulatingglassunit.

Facadestructure

Memberstowhichthestructuralsealantsupportframeisconnectedandwhichtransmitforcestothebuilding.

Finishingseal

Asextrudedfilletofelasticsealantmaterialofsuitablecross-section,whichwhencuredprovidesanadequatebarriertoairandwater,orapre-formedgasketofsuitablecross-section.

Hermetic(edge)seal

Ameansofprovidinganairtightsealattheperimeterofaninsulatingunit.Italsoresistswaterorvapouringress,lightandozonewhilstremainingcomplianttotheglassdisplacementsduetowindorotherloading.Insomesystemconfigurations,thissealmayhaveastructuralfunction.

Glass

Glasselementconsistingofoneofthefollowing:

asinglepane(monolithicorlaminated)

aninsulatingglassunit(IGU)designedforuseinSSGS

TherecanbetwoIGUtypes,thenon-steppedIGU,wherethetwopaneshavethesamenominaldimensions,andsteppedIGU,wherethetwopanesofglassareofdifferentdimensions(seeFigure4).

SeealsoreferencesforCENstandardsonglass.

Mechanicalself-weightsupport

Elementpositionedunderthebottomedgeoftheglazingandtransferstheweightoftheglazingtothestructuralsealantsupportframe.

Weatherseal

Filletofelasticmaterialorapre-formedgasketofsuitablecross-section,providinganadequatebarriertoairandwater.

Settingblocks

Loadbearingelementsbetweenthemechanicalself-weightsupportandaglassbottomedge,topositiontheglazingunitinthestructuralsealantsupportframe.

Adhesivespacer

Acontinuouspreformedstripdefiningthecross-sectionofthestructuralsealandservingtopositionandaligntheglasswithrespecttothestructuralsealantsupportframe.

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Structuralseal

Filletofelasticsealantextrudedinafactoryand,whencured,isofsufficientcross-sectiontoadequatelytransfertheforcesbetweentheglassandthestructuralsealantsupportframeandbetweenthepanesinaninsulatingunit.

Structuralsealadhesionsurface

Acontinuoussurfaceontheglassoronthestructuralsealantsupportframeonwhichthestructuralsealantadheres.

StructuralsealantsupportframeMetalelementtowhichtheglassisbonded

Bondbreaker

Anon-adhesiveinterfacialsurfacethatpreventssealantadhesion

Complementaryterminology(itemsnotshowninfigure4)

Locationblock

Resilientmaterialbetweenthestructuralsealantsupportframeandaglassedge,otherthanthebottomedge,topositiontheglazingunitinthestructuralsealantsupportframe

Mullion

Averticalframemembersupportingtheverticaledgesoftheglasselement.Itmaylimittheflexibilityoftheglasselement.

Retainingdevice

Ameansofretainingtheglasstoreducedangerintheeventofsealantfailure

Transom

Ahorizontalframemember.

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SECTIONTWO:GUIDANCEFORTHEASSESSMENTOFFITNESSFORUSE

Requirements(fortheworksandindicationofproduct-relatedaspects)

Preamble

ThischapteridentifiestheaspectsofperformancetobeexaminedtosatisfytherelevantEssentialRequirements,by:

expressinginmoredetail,andintermsapplicabletothescopeoftheguideline,therelevantEssentialRequirementsoftheCPD(givenconcreteformintheInterpretativeDocumentsandfurtherspecifiedinthemandate),forworksorpartsoftheworks,takingintoaccountthedurabilityandserviceabilityoftheworks.

applyingthemtothescopeoftheETAG(product/systemandintendeduse),andindicatingtheresultingrelevantproductcharacteristicsandultimatelyotheraspects.

Economicallyreasonableworkinglife

ThisGuidelineiswrittenontheassumptionthataworkinglifeof25yearsisintendedforthesystem.

AlltheproductspecificationsandassessmentmethodsderivedfromEssentialRequirementsfortheworksandfurtherrequirementsfortheproductsshalltakeaccountofthisassumedworkinglife.Theassumed