permalite aluminium roofing solutions · 1.0 materials 4 1.1 testing standards 4 1.2 wind forces on...

1PERMALITE® Roofing Design Manual 2016 PERMALITE® Roofing Design Manual 2016

PERMALITE®

ALUMINIUMRoofing Solutions

The durable solution to the toughest conditions

2 PERMALITE® Roofing Design Manual 2016

PERMALITE® Product information Page

Introduction 3

Eco friendly & recyclable 3

Benefits 3

1.0 Materials 4

1.1 Testing standards 4

1.2 Wind forces on roofs 4

1.3Materialsandfinishes 5

1.4Alloymechanicalproperties 5

1.5QualityAssurance 5

1.6Thermalexpansion 5

1.7Thermalprotection 5

1.8Combustability 5

1.9Environmentalconditions 5

1.10Storageandhandlingpriortouse 5

1.11 Load capacities 6

1.12Maximumlengthsforroofing 6

1.13 Roofs not accessible except for normal maintenance 6

1.14 Walking on roofs 6

2.0 Product data 7

2.1Systemprofiles 7

2.1.1 Permalite V-Rib® 7

2.1.2 Permalite Alspan® 7

2.1.3 Permalite Waveline® 7

2.1.4 Permalite LT7® 7

2.2 Paint systems 7

2.2.1 Polyesters 7

2.2.2 Fluorocarbons 7

2.2.3 Colour range 7

2.3 Design information 8

2.3.1 Introduction to design data 8

2.4 Permalite LT7® 8

2.5PermaliteAlspan® 10

2.6 Permalite V-Rib® 12

2.7 Permalite Waveline® 14

2.8 Timber and metal compatibility 16

2.9 Aluminium purlins 17

2.10Convexcurvedroofing 18

2.11 Spring curved roofs 18

2.12 Condensation 18

2.13Reversedprofile 18

2.14 Design of drainage 19

2.15Generalrainwatersystemdesign recommendations 19

2.15.1Boxgutters 20

2.16 Turn-up roof cladding 20

2.17 Roof slopes 20

3.0 Installation 21

3.1 Safety 21

3.2 Preparation 21

3.3 Squareness 21

3.4 Purlin isolation 21

3.5Sheetinstallation 21

3.6 Sheet cutting 21

3.7 Wall cladding 21

3.8 Post painting 21

3.9 Translucent sheeting 21

3.10 Sealants 21

3.11 Fastener information 22

3.12 Installation instructions 23

3.12.1 Ordering sheets 23

3.13 Fastenings 23

3.14 Fixings 23

3.14.1 Crest fasteners 23

3.14.2 Valley fasteners 23

3.14.3 Flashing & Side-lap fastening 23

3.15Pierce-fixedrooffixing 24

3.16Typesofpiercedfixings 24

3.17Endlaps 25

3.18Sidelaps 25

3.19FastenerSpecifications 26

4.0 Flashing 28

4.1Purposeofflashing 28

4.2.Flashing materials 28

4.3Roofflashing 28

4.4Bargeflashing 29

4.5Longitudinalflashings 29

4.6Transverseflashings 29

4.7 Flashing cover 29

4.8Fixingofflashing 29

4.9 Flashing at laps 29

4.10 Flashing small roof penetrations 29

4.11 Flashing large roof penetrations 30

4.12Notchingwithtinsnips 31

4.13Apronflashings 31

4.14Gutterapron 31

ConTEnTs5.0 Insulation 32

5.1Insulationmaterials 32

Foil laminates 32

Blankets and batts 32

Polystyrene boards 32

5.2Insulationthickness(glasswool) 32

5.3Roofsafetymesh 32

5.4Heatcontrolmethods 32

6.0 Anchor Points, static Lines, Guard rails and Walkways 33

7.0 Accessories 33

8.0 Engineering Certification 34

9.0 Combustion Certification 35


InTRoduCTIonAluminiumisalonglasting,durable,lightweightalternativetoothercladding materials.

Aluminium provides high thermal insulation and minimal maintenance to remain corrosion-free.

Itiseasiertotransportanderectbecauseitissignificantlylighterthanmany alternate cladding materials.

This book is a guide to the installation of aluminium roofing and wallingmanufacturedbyPermalite. We intend that it be used by all tradesandprofessionsinvolvedwithspecifyingandapplyingtherange of our products. Referencetothismanualwillallowyoutomaximisethebenefitsofaluminiuminyournextproject.

WereferonlytogenuinePermalite®aluminiumroofingandwallingmanufactured by us and marketed under our brand names. Our recommendations should only be used for our products because they are based on comprehensive testing of our profiles, base-metal-thicknesses(BMT)andmaterialfinishes.

Our products are engineered to perform according to our specifications only if they are used in the appropriate conditions and installed to the recommendations in this manual and our other publications.

Wherewerecommenduseofthirdpartymaterials,ensureyoucheckthequalitiesandcapabilitiesofthoseproductswiththerelevantmanufacturer before use.

Walls When you design Permalite® aluminium cladding into your building youhavearangeofprofilesfromwhichtochoose.Whilstcladdingobviouslyneedstokeepouttheweather,italsohassignificanteffectson the looks, cost and durability of a building.

RoofsThere are many factors in designing roofs including:

• theshape:istherooftobe‘flat’orpitched or curved?

• thesupportingstructureandsupportspacing;

• thewindforcesthattheroofmustsustain;

• thepitchwhichaffectsthelooks,theprofile’sabilitytoefficientlycarryraintothegutters,andfixingdetails;

• thermalexpansionoflongsheets(Section1.6);

• theattributesofothermaterialsusedintheroofdesign.

Thisbookdoesn’tattempttocoverthestructuraldesigndetailsofsupports or aesthetics: there are many other texts and Australian Standards that cover these areas.

This Manual provides tables of load capacities, and the maximum roof length for pitch and rainfall intensity for Permalite® aluminium roofing products.

Theappropriatedesignwilldependonyourparticularneedsandcircumstances. You should get advice from the relevant specialists whererequired.

ECo-FRIEndLy & RECyCLAbLEChoosingtheoptimummaterialforyournextprojectshouldtakeaccountofthefulllifetimeofthematerial.Thiswillincludeconstruction,use,maintenanceanddisposal.Materialswhichcanberecycledeasilyandeconomicallyandwhichdonotrequirelandfilldisposal should be preferred.

Aluminium’sformability,highstrength-to-weightratio,corrosionresistance,andeaseofrecyclingmakesittheidealmaterialforawiderangeofbuildingapplications.Itisalmostuniquelysuitedforprojectsin harsh industrial and marine environments.

Benefitsdurability: TheoutstandingbenefitofPermalite®AluminiumRoofingProductsis their long-term durability in aggressive environments. Permalite® roofs have been installed in Australia since the 1960s. This proven trackrecordinAustralia’sharshestconditionsmeansyoucanbeassuredofaneffectiverooflifesignificantlylongerthanformostotherroofingmaterials.

Thermal efficiency: Unpaintedaluminiumcanreduceheattransmissionbyupto9.5ºCduetoitshighthermalinsulationproperties.Thisissignificantinreducing the ever-increasing operating cost of air conditioning.

Weight: The lighter mass of aluminium may provide a reduction of the cost of transport to remote locations.


1.0 MATERIALs1.1 TEsTInG sTAndARdsAS1562.1:1992specifiesthedesignandinstallationofsheetmetalroofandwallcladding.OurPermalite®profilessatisfyallthe requirements of this Standard, including the ability of the roof towithstandconcentratedloadsaccordingtoAS4040.1andwindpressure in non-cyclonic regions according to AS 4040.2.

note on testing for cyclonic areasTheBuildingCodeofAustralia(BCA)currentlyrequiresallmetalroof claddings, its connections and immediate supporting members towithstandalow-high-low(LHL)pressuresequence.Permalite® aluminiumcladdingsaresubjectedtocyclonicconditions,accordingtotheBCAdefinition,andassuch,mustbetestedusingtheLHLcyclonic testing methodology to determine their capacity.Jame’sCookUniversity‘sCycloneTestingStationhasperformedcomprehensivesimulatedwindloadingpressuretestsoftheentirerange of Permalite® aluminium claddings fastened to 1.9mm BMT G450steelpurlinsforthemostaccurateresults.ThesetestswereconductedonadirectairpressurerigintheUniversity‘sCycloneTesting Station laboratory.

4500 cycles - 0.45Pt5000 cycles 10000 cycles

600 cycles - 0.6Pt80 cycles - 0.8Pt1 cycle - Pt

L-H-L Loading regime from BCA

Low Low

HighPt

Figure 1.1 ThesequenceL-H-LloadingregimeisshowninthegraphabovewherePtistheultimatelimitstatetestpressure.

1.2 WInd FoRCEs on RooFs

Winds create considerable forces on both the topside and the underside of roof cladding, and you must consider these forces in the design and fixing of any roof. The forces are:

• inward forces tendingtocollapsetheroofcladdinginwards,causedbywindactingdirectlyonthewindwardside;and

• outward forces tending to lift the roof cladding from its framing, and theentireroofstructurefromtherestofthebuilding.Outwardforcescanbecausedbothbyupliftfromnegativewindpressures,outsidethebuilding;andbypositivewindpressureinsidethebuilding.

Generallythegreatestwindforcesimposedonroofsareduetotheoutwardforces.Becausethedeadweightofroofingmaterialsisrelativelysmall,theoutwardforcesmustberesistedbytherooffasteners.

It is very important that the battens and roof framing are adequately fixedtotheraftersandwalls,andthatunderextremeconditionsthewallframing is anchored to the footings. Special anchoring provisions may apply in cyclonic areas. Specialist advice should be sought in these circumstances.


1.3 MATERIALs And FInIshEsAllPermalite®aluminiumroofingprofilesandflashingsareproducedfrom marine grade aluminium alloy entirely. No coatings or claddings arerequiredtoenhanceperformanceoreconomy;youdon’thaveto consider coating thickness. Due to this Permalite aluminium sheetingisdeemedtocomplywithTable3.5.1aAcceptableCorrosionProtectionforSheetRoofingunderNote6oftheBuildingCodeofAustralia.

The quality of the paint systems used on Permalite® aluminium roofingproducts(ReferSection2.2)isanadditionalbonustothedurability of the sheet itself.

LT7, Alspan, Waveline and V-Rib are manufactured entirely from aluminiumalloy5251or5052producedbyPermalite®toAS/NZS1734:1997

Alloy5251/5052arehighstrengthmarinegradealloyswithexceptional resistance to corrosion in marine or industrial environments.

Theprofilesareavailableinthreefinishes:

Mill Finish–anunpaintedsmoothlustrousfinishwhichwilldullrelatively quickly and enhances corrosion resistance.

stucco Finish–stuccoembossedmillfinish,whichreducesthespecularreflectanceofmillfinishsheet.

Painted Finish–arangeofqualitypaintedfinishes(Section2.2)areavailable.

1.4 ALLoy MEChAnICAL PRoPERTIEsThefollowingpropertiesaretypicalofmillfinish,unpaintedsheet.

Alloy 5251 5052Temper H38 H38MinimumYieldStrength,MPa 225 220Ultimate Tensile Strength 260 270Elongation 0.70 BMT 3% 3%Elongation 0.90 BMT 4% 4%Elongation 1.20 BMT 4% 4%CoefficientofThermalExpansion24x10-6perºC(Approx.1.2mm/mover50ºC)

1.5 QuALITy AssuRAnCEThein-linepaintingandrollformingofPermalite®aluminiumroofingandwallingproductsareconductedinAustraliainaccordancewithBlueScope’sstrictqualitycontrolguidelines.Permalite®holdsQualityCertificationtoAS/NZS9001:2008.

1.6 ThERMAL ExPAnsIonAlthoughaluminiumhastwicethecoefficientofexpansionofsteel,(24x10-6 compared to 12 x 10-6ºC) the effect of this is often over estimated.

Usuallyaluminiumcladdingisfixedtoasteelstructure,which,underthesamethermalinfluence,expandsorcontractsalso.

Thecombinationofthesefactorsresultsinalowrelativeexpansionbetweenthealuminiumcladdingandthesteelstructure.Ithasbeenobserved in practice that the theoretical expansion of an aluminium roof,relativetothesteelstructureonwhichitisfixed,isreducedbyupto50%.

NOTE:Asanapproximation,aluminiumexpands1.2mm/mover50°temperature change.

1.8 CoMbusTIbILITyPermalitealuminiumcladdingshavebeentestedtoAS1530.31999withthefollowingcombustibilityresults:Ignitability Index: 0Spread of Flame Index: 0HeatEvolvedIndex: 0Smoke Developed Index: 2Andassuch,complieswithclauseC1.12oftheBuildingCodeofAustralia as a non-combustible material.Referto9.0CertificationofNon-Combustibility.

1.9 EnvIRonMEnTAL CondITIonsAluminium products are generally specified for severe environmental conditions including industrial, agricultural, marine, intensive animal farming,swimmingpoolsorotheraggressiveconditions.Togetthebest performance from our products in these conditions, or other unusually corrosive environments, seek advice from our technical representatives.

1.10 sToRAGE & hAndLInG PRIoR To usE Aluminiumroofingrequirescareduringhandlingandinstallation.Installation damage can be avoided by taking reasonable care and followingtherecommendationsofthismanual.

Keep the product dry and clear of the ground. If stacked or bundled productbecomeswet,separateit,wipeitwithacleanclothandstackit to dry thoroughly.

Productthathasbecomewetintransportistobeunpackedimmediately and each section dried thoroughly prior to repacking. Bundled sections and accessories should not be left exposed in theopenforanyperiodaswaterstainingmayresultbetweenanyaluminiumsurfacesincontactwitheachother.Millfinishaluminiumisparticularly susceptible to this type of staining.

Contactwithmoisture,cementdust,limeorabrasivedustistobe avoided. If not required for immediate use, sections should be neatly stacked off the ground, covered and on a slight slope so that watercandrainawayItshouldbenotedthatwhilstwaterstainingisunsightlyitwillnotaffectthestructuralintegrityordurabilityoftheproductinanyway.Packsofsheetstoredontheroofmustbeplacedover trusses or purlin supports.

Unpainted GalvanisedSteel (Weathered) (NewtoWeathered)Reflectivity 0.74 0.34to0.11Absorptivity 0.26 0.66 to 0.89Emissivity 0.11 0.28 to 0.42

Thefollowingthermaltransmittancevalues(U)areapplicabletoaweatheredaluminiumroofwithnoceiling.AluminiumRoofingSheet UValue(W/m3K)Under Roof Insulation Summer Winter50mmwoolandreflectivefoil 0.43 0.5840mmspaceand50mmwoolandreflectivefoil 0.36 0.51

1.7 ThERMAL PRoTECTIonThelowemissivityofunpaintedaluminiumroofinggreatlyreducesheatgaininabuildingwhereanairspaceisprovidedontheundersideoftheroof.Thefactorsofreflectivityandabsorptivityofunpaintedaluminiumarealsofavourable,particularlywhentheunderside of the roof is insulated.

Onpaintedroofs,theuseoflightcolourswillhelptoreducethethermal absorptivity of the paint coating.

Table 1.1 Thermal factors


1.11 LoAd CAPACITIEs

Themaximumrecommendedloadcapacitiesareshowninthefollowingpages.TheyarebasedonAS1562.1:1992Designandinstallationofsheetroofandwallcladding:Metal.

In all cases, cladding is fixed to a support of 1.9mm minimum base metalthickness(BMT)andminimumyieldstressofG550.Ifyouwanttousemetalbattensthinnerthan1.9mm,seekadvicefromourinformation line.

1.12 MAxIMuM LEnGThs oF RooFInG Thevalleys(orpans)ofroofinghavetocarrywatertothegutters.Ifinheavyrain,thevalleysoverfill,watercanflowintotheroofthroughthe side-laps and flashings.

Factorsaffectingwaterproofanddrainagecapacityofthelapsofaprofile include:

• thewidthanddepthofthevalleysorpans;• thepitchoftheroof—rainflowsfasteronasteeperpitch;• rainfallintensityforthegeographicalarea;• thelengthoftherooffromridgetogutter;and• penetrationsthatcausenearbyvalleystocarryextrarain

diverted from valleys obstructed by the penetrationThe maximum recommended roof lengths for drainage for each profile are given in Section 2.14.

1.13 RooFs noT ACCEssIbLE ExCEPT FoR noRMAL MAInTEnAnCEMaximumsupportspacingsasshowninTable1.2aresuitableforroofs not accessible except for normal maintenance and are based on test data for concentrated loads according to AS 4040.1:1992 Methodsoftestingsheetroofandwallcladding—Resistancetoconcentratedrooftrafficloads.

1.14 WALkInG on RooFsItisimportantthatyouwalkonroofingcarefully,toavoiddamagetoeithertheroofingoryourself.Generally,keepyourweightevenlydistributed over the soles of both feet to avoid concentrating your weightoneitherheelsortoes.Alwayswearsmoothsoft-soledshoes;avoidribbedsolesthatpickupandholdsmallstones,swarfandotherobjects.

Whenyouwalkacrosstheribs,walkoverorclosetotheroofingsupports.(Usuallyoverfastenerlocations.)Becarefulwhenmovingbetweensupports.Donotwalkinthepanimmediatelyadjacenttoflashingsortranslucentsheeting.Walkatleastonepanaway.

Temporaryplankwalkwaysshouldbeprovidedwhileothertradeswalkontheroof.(Hightrafficareas)

Alwaystakeparticularcarewhenwalkingonwetornewlylaidsheets—particularlyonsteeplypitchedroofs.

Permalite® LT7 Internal End span overhang span 0.70mm 1.8m 1.4m 120mm 0.90mm 2.4m 2.1m 150mm 1.20mm >2.4m >2.1m >150mm Permalite® Alspan 0.70mm 2.1m 1.9m 150mm 0.90mm 3.0m 3.0m 180mm 1.20mm >3.0m >3.0m >180mm Permalite® v-Rib 0.70mm N/A N/A N/A 0.90mm 2.4m 2.1m 150mm 1.20mm >2.4m >2.1m >150mm Permalite® Waveline

0.90mm 1.5m 1.2m 120mm

Permalite®V-Rib0.7mmisnotsuitableasroofing.Pleaseseekspecialist advice from our technical advisory service.

Figure 1.2 Cladding spans

Table 1.2 Maximumsupportspacingsbasedonfoottrafficloadings


2.1.4 PERMALITE LT7®

Theversatilityofthisprofileisduetoitsstrength,watercarryingcapacityandfixingeconomy.Thecoverwidthis875mm.

Itiswidelyusedforroofingandcanbereversedtoprovideaboldwalleffect.

2.1 sysTEM PRoFILEsPermalite® offers four different solutions to provide a range of stylish, economical and durable systems suitable for almost any cladding applications.

2.1.1Permalite v-Rib®

Thesymmetryand915mmcoverwidthofthisproductprovideexcep-tionaleconomythroughfasterfixingandminimumwastage.Thesefactorsareimportantonsmallerprojectsandcomplexroofandwallsorwhereastrikingdesignisrequired.

2.1.3 Permalite Waveline®

Thetraditionalcorrugatedstyleand990mmcoverwidthofthisproductprovidesminimumwastageandquickinstallation.Whetheryouwantatraditionalstyleorthemodernlook,theuniversalappeal of Waveline is the right choice.

2.1.2 PERMALITE ALsPAn®

Thisprofilewasdesignedspecificallytoprovideawidespanningcapabilityandadistinctiveappearance.Coverwidthis875mm.

Thelargerobustribsandexceptionalwatercarryingcapacityofthisprofilemakeitidealforlargehighperformanceroofssuchaspowerstationsandindustrialorcommercialbuildings.Theprofileisalsousedonwallswhereastrongvisualeffectisrequired.

2.2 PAInT sysTEMsPermalite® Roof and Wall Sheet may be supplied prepainted on one or both sides.

Aluminium provides an excellent painting base for paint systems. Before roll forming, the paint is applied to the coiled sheet by reverse roller coating and heat curing on paint lines employing the latest painting technology.

2.2.1 PolyestersThenewgenerationPolyesterpaintshaveoutstandingcolourandglossretentioncharacterisitcs.This,coupledwiththeirresistancetoscratchingduringtransportationandinstallation;makethesepaintssuitableforthemajorityofseveremarineandindustrialenvironments.PolyesterpaintsystemshavebeenextensivelytestedinAustralia’stough environment over many years. Colours available in store are:

* ENDUROGREEN®†* GLACIERWHITE®

* MOONSHADOW®*GULLGREY®

* SAHARA®* SLATEGREY®

2.2.2 FluorocarbonsIncertainapplicationsandcolours,fluorocarbonpaintsmayofferimproved colour and gloss retention levels over polyester paints. Howeverfluorocarbonpaintshavealowerscratchresistanceandas such are more susceptable to damage during transportation and installation. This needs to be considered against the additional cost of these paint systems. Ask our Permalite® technical team for advice regardingyourproject.

2.2.3 Colour RangeMost Standard COLORBOND® steel colours based on minimum order quantities of 3.0 tonne. Other colours avalable on application withminimumorderquantitiesandextentedleadtimes.

* Brochures colours are only approximate - refer to painted colour chip for actual colour.†ThiscolourissubjecttominimumorderquantityandlongerleadtimeswhenorderedwithourWavelineprofile.

2.0 PRoduCT dATA


2.4 PERMALITE® LT7Theversatilityofthisprofileisduetoitsstrength,water-carryingcapacityandfixingeconomy.Itiswidelyusedforroofingandcanbereversedforaboldwalleffect.

Thickness Range: 0.70mm, 0.90mm, 1.2mm BMT LengthRange: 850mmto23metresPan Cross Section Area: 26,000mm2/metresheetwidthTolerances: Length+0mm,-15mm Width +0mm, -3mmFinishes: Mill, Stucco Embossed, Painted (StuccoEmbossednotavilablein 1.2mm)

Cover width 875mm

19mm

57mm38mm

125mm pitch

Sheet width 933mm

Purlin and girt spacingsThewindloadingsusedinconjunctionwiththesechartsaretobedeterminedinaccordancewithAS/NZS1170.2:2011

ThevaluesapplytothesheetbeingfastenedwiththePermalite®PositiveFixSystem(Section3.15).

2.3 dEsIGn InFoRMATIon2.3.1 InTRoduCTIon To dEsIGn dATAThefollowingsectionisintendedtoprovidethedesignerofthebuildingcladdingwiththedatarequiredtospecifythemostcosteffectiveuseoftheproductsandtheirefficientinstallation.

The data applies to conventional structures in both cyclonic and non-cyclonic areas.

Alldesigndataisvalidforthefollowingconditions.

•Minimumsupportmembermaterialis1.9mmBMTG450steel•Allspansarecontinuous(twoormorespans)andequal•ServiceabilityLimitStateDesignpressuresarebasedondeflectionlimitequalto(span/120+pan/30)accordingtoSection5.5.1ofAS1562.1:1992

If your requirement is outside these parameters you are invited to callontheservicesofPermalite’sexperiencedtechnicalstaffbycontactingthePermalite®SalesOfficeslistedinthispublication.

Figure 2.1 Permalite®LT7profile

Table 2.1 ProfilepropertiesPermalite®LT7

FLEXLOK-AL®

Zx Zy Ix Iy

0.90 3.567 1.427 280 5.206 50.56 280 109901.20 4.756 1.902 210 6.942 67.41 373 14660

LT7®

Zx Zy Ix Iy

0.70 2.645 2.314 378 8.274 135.9 186.4 633900.90 3.401 2.976 294 10.64 174.7 239.7 815001.20 4.534 3.967 221 14.18 232.9 319.5 108700

V-RIB®

Zx Zy Ix Iy

0.70 2.529 2.314 395 7.693 140 127.1 677100.90 3.252 2.976 308 9.89 180 163.5 870501.20 4.336 3.967 231 13.19 240 217.9 116100

ALSPAN®

Zx Zy Ix Iy

0.70 2.529 2.314 395 8.618 139 295.1 660300.90 3.252 2.976 308 11.08 178.7 379.4 849001.20 4.336 3.967 231 14.77 238.2 505.9 113200

WAVELINE®

Zx Zy Ix Iy

0.70 762 2.340 1.783 427 2.546 93.03 22.55 390300.70 990 2.338 2.314 428 3.356 157.9 29.11 870700.90 762 3.009 2.293 332 3.274 119.6 28.99 501800.90 990 3.006 2.976 333 4.314 203 37.43 112000

2nd Moment of area about principal axis

(x103mm4)Thickness

(mm)

kg/m Cover width

(Mill finish)

kg/m Length(Mill finish)

m /tonne(Mill finish)

Section Modulus about principal axis(x103mm3)

2nd Moment of area about principal axis(x103mm4)

Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

Cover Width(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





notes:1. Refer to Permalite® for any further details of cladding installation not covered

in this manual, details of test results or other design matters.2. These design capacities are based on legislation and standards that are currentatthetimeofpublicationandmaybesubjecttochange-thereforethe published capacities should be reappraised by the date noted.

3. For 1.2mm BMT, use 0.9mm BMT values.

Table 2.2 Permalite LT7: Limit State wind pressure capacities (kPa)Continuous Spans with all spans equal

Non Cyclonic based on screws on every ribBase metal Limit State

(kPa) Span (mm)

thickness, mm 900 1200 1500 1800 2100 2400

0.7Serviceability 8.75 7.93 5.2 3.09Strength 15.05 9.32 8.25 8.11

0.9Serviceability 7.93 5.3 3.44 2.2 1.57Strength 10.17 9.45 8.74 7.95 7.25

Non Cyclonic based on screws on alternate ribsBase metal Span (mm)thickness, mm 900 1200 1500 1800 2100 2400



Cyclonic based on screws on every ribBase metal Span (mm)thickness, mm 900 1200 1500 1800 2100 2400



Limit State(kPa)

Limit State(kPa)


2.5 PERMALITE ALsPAn®

Thisprofilewasdesignedspecificallytoprovideawidespanningcapability,tohaveahighwater-carryingcapacityandtoaccommodatefoottrafficwithoutdamage.

Alloftheserequirementsarerealisedinthedistinctiveribsandwidepanswhichofferawell-definedpresentationoflargeareas.

Thickness range: 0.70mm 0.90mm 1.2mm LengthRange: 850mmto23metresPanCrossSectionarea: 37,500mm2/metresheetwidthTolerances: Length+0mm,-15mm Width +0mm, -3mmFinishes: Mill, Stucco Embossed, Painted (StuccoEmbossednotavilablein 1.2mm)

Purlin and girt spacingsThewindloadingsusedinconjunctionwiththesechartsaretobedeterminedinaccordancewithAS/NZS1170.2:2011.

ThevaluesapplytoallribsofthesheetbeingfastenedwiththePermalite®PositiveFixSystem(Section3.15).

The eave span for 0.70mm thickness should not exceed 1.8 metres whereaccesstotheroofmayberequired.

114mm

52mm

30mm

219mm

875mm cover width

960mm sheet width

Table 2.3 ProfilepropertiesPermaliteAlspan®

Figure 2.3 PermaliteAlspan®profile

FLEXLOK-AL®

Zx Zy Ix Iy

0.90 3.567 1.427 280 5.206 50.56 280 109901.20 4.756 1.902 210 6.942 67.41 373 14660

LT7®

Zx Zy Ix Iy

0.70 2.645 2.314 378 8.274 135.9 186.4 633900.90 3.401 2.976 294 10.64 174.7 239.7 815001.20 4.534 3.967 221 14.18 232.9 319.5 108700

V-RIB®

Zx Zy Ix Iy

0.70 2.529 2.314 395 7.693 140 127.1 677100.90 3.252 2.976 308 9.89 180 163.5 870501.20 4.336 3.967 231 13.19 240 217.9 116100

ALSPAN®

Zx Zy Ix Iy

0.70 2.529 2.314 395 8.618 139 295.1 660300.90 3.252 2.976 308 11.08 178.7 379.4 849001.20 4.336 3.967 231 14.77 238.2 505.9 113200

WAVELINE®

Zx Zy Ix Iy

0.70 762 2.340 1.783 427 2.546 93.03 22.55 390300.70 990 2.338 2.314 428 3.356 157.9 29.11 870700.90 762 3.009 2.293 332 3.274 119.6 28.99 501800.90 990 3.006 2.976 333 4.314 203 37.43 112000


(x103mm4)Thickness

(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

Cover Width(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





notes:1. Refer to Permalite for any further details of cladding installation not covered


3. For 1.2mm BMT, use 0.9mm BMT values

Table 2.4 Permalite Alspan: Limit State wind pressure capacities (kPa)Continuous Spans with all spans equal

Non Cyclonic based on screws on every rib Base metal Limit State

(kPa)

Limit State(kPa)

Span (mm)thickness, mm 600 900 1200 1500 1800 2100 2400 2700 3000

0.7 Serviceability 8.26 6.20 4.59 3.40 2.55 2.00Strength 15.00 10.10 6.21 4.20 3.10 2.67


1.50 1.082.172.75

Cyclonic based on screws on every ribBase metal Span (mm)thickness, mm 600 900 1200 1500 1800 2100 2400



10.177.926.104.834.073.393.02


2.6 PERMALITE® v-RIbThewide(915mm)coverwidthofPermalite®V-Rib,inconjunctionwithitssymmetricalprofile,providesaroofingsheetwhichcanbeusedeffectivelyonwallsalso.Adoublecapillarydrainintheriboverlapensuresweathersecurity.

Aswellasprovidinganeat,balancedappearanceonbuildings,thisprofileisalsoeffectivelyusedasinsulationjacketinginpowerstations and chemical processing plants.

Thickness Range: 0.70mm 0.90mm 1.2mmLengthRange:850mmto23metresPan Cross Section Area: 16, 342mm2/metresheetwidthTolerances: Length+0mm,-15mm Width +0mm, -3mmFinishes: Mill, Stucco Embossed, painted (StuccoEmbossednotavilablein 1.2mm)

Purlin and girt spacingsWindloadingsusedinconjunctionwiththefollowinggraphsaretobedeterminedinaccordancewithAS/NZS1170.2:2011.

ThevaluesapplytothesheetbeingfastenedwiththePermalite®PositiveFixSystem(Section3.15).

31.7mm

25.4mm25.4mm

101.7mm

915mm cover width

965mm sheet width

Table 2.5 ProfilepropertiesPermalite®V-Rib

Figure 2.4 Permalite®V-Ribprofile

FLEXLOK-AL®

Zx Zy Ix Iy

0.90 3.567 1.427 280 5.206 50.56 280 109901.20 4.756 1.902 210 6.942 67.41 373 14660

LT7®

Zx Zy Ix Iy

0.70 2.645 2.314 378 8.274 135.9 186.4 633900.90 3.401 2.976 294 10.64 174.7 239.7 815001.20 4.534 3.967 221 14.18 232.9 319.5 108700

V-RIB®

Zx Zy Ix Iy

0.70 2.529 2.314 395 7.693 140 127.1 677100.90 3.252 2.976 308 9.89 180 163.5 870501.20 4.336 3.967 231 13.19 240 217.9 116100

ALSPAN®

Zx Zy Ix Iy

0.70 2.529 2.314 395 8.618 139 295.1 660300.90 3.252 2.976 308 11.08 178.7 379.4 849001.20 4.336 3.967 231 14.77 238.2 505.9 113200

WAVELINE®

Zx Zy Ix Iy

0.70 762 2.340 1.783 427 2.546 93.03 22.55 390300.70 990 2.338 2.314 428 3.356 157.9 29.11 870700.90 762 3.009 2.293 332 3.274 119.6 28.99 501800.90 990 3.006 2.976 333 4.314 203 37.43 112000


(x103mm4)Thickness

(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

Cover Width(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





notes:1. Refer to Permalite for any further details of cladding installation not covered


3. For 1.2mm BMT, use 0.9mm BMT values.

Table 2.6 Permalite V-Rib: Limit State wind pressure capacities (kPa)Continuous Spans with all spans equal

Non Cyclonic based on screws on every rib Base metal Limit State

(kPa)

Limit State(kPa)

Limit State(kPa)

Span (mm)thickness, mm 900 1200 1500 1800 2100 2400

0.7 Serviceability 8.34 5.50 3.29 1.90 1.26Strength 13.69 11.60 9.60 7.10 4.63


Non Cyclonic based on screws on alternate ribs Base metal Span (mm)thickness, mm 900 1200 1500 1800 2100 2400



Cyclonic based on screws on every rib Base metal Span (mm)thickness, mm 900 1200 1500 1800 2100 2400




2.7 PERMALITE® WAvELInETheclassicAustralianprofileisusedintraditionalaswellasmodernapplications.

Permalite®Wavelineisavailablein2widths.Traditional762mm*coverwidthforcurvingandourstandard990mmcoverwidthforgreaterfixingeconomy.ThesecoverwidthsforPermalite®Waveline,providesaroofingsheetwhichcanalsobeusedeffectivelyonwalls.

Thickness Range: 0.70 & 0.90mmOtherthicknessesavailablesubjecttominimumorderquantity.LengthRange: 850mmto11.3metresPan Cross Section Area: 8423mm2/metresheetwidthTolerances: Length+0mm,-15mm Width +0mm, -3mmFinishes: Painted,Millfinish

* Extended lead times apply.

762mm cover

820mm sheet

1048mm sheet

76mm

990mm cover

16mm

Purlin and girt spacingsWindloadingsusedinconjunctionwiththefollowinggraphsaretobedeterminedinaccordancewithAS/NZS1170.2:2011.

Figure 2.5 Permalite®WavelineProfile

Table 2.7 ProfilepropertiesPermalite® Waveline

FLEXLOK-AL®

Zx Zy Ix Iy

0.90 3.567 1.427 280 5.206 50.56 280 109901.20 4.756 1.902 210 6.942 67.41 373 14660

LT7®

Zx Zy Ix Iy

0.70 2.645 2.314 378 8.274 135.9 186.4 633900.90 3.401 2.976 294 10.64 174.7 239.7 815001.20 4.534 3.967 221 14.18 232.9 319.5 108700

V-RIB®

Zx Zy Ix Iy

0.70 2.529 2.314 395 7.693 140 127.1 677100.90 3.252 2.976 308 9.89 180 163.5 870501.20 4.336 3.967 231 13.19 240 217.9 116100

ALSPAN®

Zx Zy Ix Iy

0.70 2.529 2.314 395 8.618 139 295.1 660300.90 3.252 2.976 308 11.08 178.7 379.4 849001.20 4.336 3.967 231 14.77 238.2 505.9 113200

WAVELINE®

Zx Zy Ix Iy

0.70 762 2.340 1.783 427 2.546 93.03 22.55 390300.70 990 2.338 2.314 428 3.356 157.9 29.11 870700.90 762 3.009 2.293 332 3.274 119.6 28.99 501800.90 990 3.006 2.976 333 4.314 203 37.43 112000


(x103mm4)Thickness

(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

Cover Width(mm)

kg/m Cover width

(Mill finish)





Thickness(mm)

kg/m Cover width

(Mill finish)





notes:

1. Refer to Permalite® for any further details of cladding installation not covered in this manual, details of test results or other design matters.

2. These design capacities are based on legislation and standards that are current atthetimeofpublicationandmaybesubjecttochange-thereforethepublishedcapacities should be reappraised by the date noted.

3. Refer to Permalite® Aluminium Residential Solutions for 0.7mm BMT design data.

Table 2.8 Permalite Waveline: Limit State wind pressure capacities (kPa)Continuous Spans with all spans equal

Non Cyclonic based on screws on alternate ribs (without cyclonic washers) but with 16mm bonded washer Base metal Limit State

(kPa)

Limit State(kPa)

Limit State(kPa)

Span (mm)thickness, mm 900 1200 1500 1800

0.9Serviceability 6.07 2.47 0.90 0.73Strength 7.27 5.39 3.58

Non Cyclonic based on screws on alternate ribs with cyclonic washersBase metal Span (mm)thickness, mm 900 1200 1500 1800

0.9Serviceability 6.07 2.47 0.9 0.73Strength 9.09 6.74 4.48

Cyclonic based on screws on alternate ribs with cyclonic washersBase metal Span (mm)thickness, mm 900 1200 1500 1800



2.8 TIMbER And METAL CoMPATIbILITy Undernocircumstancesshouldgalvanisedsteel,ZINCALUME® steel,lead,copper,brass,orcopperalloysbeplacedincontactwithaluminium,norshouldyoupermitwaterrunofffromthesematerialstodischarge onto aluminium sheets.

Caremustbetakentoavoidcontactwithbuildingmaterialssuchasunseasoned or chemically treated timber, lime cement, concrete, mortar or plaster during construction and to provide impermeable barriers against long term contact.

In most situations the face of a dissimilar metal or timber support, againstwhichthesheetingisfastened,istobepaintedwithchromatebasedprimers/bituminouspaintorgoodquality(andappropriatewidth)adhesivePVCorpolyethylenetape.

Underseveremarineand/oraggressiveindustrialenvironmentsDenso tape or closed cell polyethylene tape should be used to completelyfillthesheet/structureinterfacetoavoidmoistureretentionbycapillaryaction.Permalite®willprovideadviceinsuchsituations.

If there are doubts about the compatibility of other products being used, seek advice from our technical representative.

Seetablesbelowfordirectcontactandrainwaterdischargecompatibility issues.

Permalite Aluminium roof sheeting

Heavy Duty (min. 250 micron thickness)

self adhesive PVC or polyethylene tape (or equivalent)

Steel purlin

Figure 2.6 Intermaterial preparation measures

Table 2.9 Compatibility of direct contact between metals or alloysACCESSORIES OR FASTENER OR (UPPER SURFACE)

ZINCALUME® GALVANISED STEEL

STAINLESS STEELCOPPER & COPPER ALLOYS(1)

LEAD

ROOF DRAINAGE SYSTEMCOMPONENTS & ANY CLADDING MATERIAL ZINCALUME® GALVANISED

STEELCOLORBOND® including

ULTRA & METALLIC

COLORBOND® including ULTRA & METALLIC

STAINLESS STEEL (3)

COPPER & COPPER ALLOYS(1) LEAD

ALUMINIUM ALLOYS

ALUMINIUM ALLOYS

ZINC

ZINC

COLORBOND® STAINLESS


STAINLESS STEEL

ALUMINIUM ALLOYS


YES NO YES YES YES

NONO

YES

NONO

YES YES YES YES

NONONONO YES

YES YES YES YES

NONONONO

YES YES YES

YES NONONONO

NO NO NO NO NO

NO NO

NO NO NO NO NO

NO NO NO NO

YESYES

YESYES

NO NO

NO NO YES

NO NONO

YES

NO NO NO

NO NONO

NO NO NO NO

NO NONO

NO

NO

Table 2.10 Acceptability of drainage from an upper surface to a lower metal surface

ZINCALUME® GALVANISED STEEL

COLORBOND® STEEL (plus ULTRA®& METALLIC®)

COLORBOND® STEEL (plus ULTRA®& METALLIC®)

STAINLESS STEELCOPPER & COPPER ALLOYS(1)

LEAD

LOWER ROOF DRAINAGE SYSTEM MATERIAL ZINCALUME® GALVANISED

STEELCOPPER &

COPPER ALLOYS(1) LEAD

ALUMINIUM ALLOYS

ZINC

ZINC


UPPER CLADDING OR ROOF DRAINAGE SYSTEM MATERIAL

YES NO

NO NO

NO YES

YES YES

YESYES

YES

YES

YES

YES YES

YES YES

YES

YES

YES

YES

YESYES

YES

YES

YES

YES

YES

YESYES

NO NO NO YES

YES YES

YES

YESYES

YES

YESYES

NO NO

YES

YES YES

NO

YES

NO YES

GLAZED TILES,GLASS & PLASTIC

YES

YES

NONO

YES

YES

YES YES

YES

YES

YES YES

YES

YESYESYESYES

YESYES

YES

YES

YESYESYES

YES

YES

NO NO

YESYES

NO NO

NO NO

YES NO

NOYESYES

NO

YES

(1) MONEL - COPPER/NICKEL ALLOY(2) FOR FURTHER GUIDENCE REFER TO AS/NZS 3500.3:2003

(1) MONEL - COPPER/NICKEL ALLOY(2) FOR FURTHER GUIDENCE REFER TO AS/NZS 3500.3:2003(3) FIXINGS ONLY

4

4

3

(3) OUR EXPERIENCE IS THAT THESE MATERIALS ARE NOT COMPATIBLE IN EXTREMELY CORROSIVE ENVIRONMENTS, SO OUR ADVICE DIFFERS FROM AS/NZS 3500.3:2003


2.9 ALuMInIuM PuRLInsThemajorbenefitsofaluminiumpurlinsaretheircorrosionresistance,easeofhandling,andcrane-hiresavingsindifficultsituations.

Inareasofapplicationsofdifficultaccessaluminiumpurlins(andotherstructuralcomponents)maybehandledmanuallytherebyprovidingsubstantial savings in crane hire.

The PERMALITE® brochure Aluminium Purlin Solutions for Structural Applications provides loading tables, assembly details, and componentsisavailableatwww.permalite.com.au

1

PERMALITE® Purlins Design Manual

2013

PERMALITE® Purlins Design Manual

2013

AluminiumRollformedPurlin Solutions

• The durable solution for the toughest conditions.• Wide range of rollformed

sections with downturn lip option.

• Limit State design data with multiple spanning and

lapping options.• Aluminium EZY-LOK® bridging system.

Table 2.11 Purlins & Girts dimensions

B

B

E

F

Figure 2.7a Standard purlin dimensions

Figure 2.7b Purlindimensions(Downturnedlips)

Dimensions of Permalite Zeds

Section t D E F L mmm mm mm mm mm kg/m

AZ10025 2.5 105 63.5 55.5 16.0 1.572AZ10030 3.0 105 65 57 16.0 1.886AZ15025 2.5 155 66 58 24.0 2.046AZ15030 3.0 155 67 59 24.5 2.455AZ20025 2.5 205 81 73 25.0 2.602AZ20030 3.0 205 82.5 74.5 25.0 3.122AZ25025 2.5 255 81 73 25.5 2.947AZ25030 3.0 255 82 74.5 26.0 3.537AZ30025 2.5 300 114 106 30.0 3.760AZ30030 3.0 300 115.5 107.5 30.0 4.512AZ35030 3.0 350 130.5 122.5 30.0 5.163AZ40030 3.0 400 130.5 122.5 30.0 5.569

Dimensions of Permalite Cees

Section t D B L mmm mm mm mm kg/m

AC10025 2.5 105 59 16.0 1.572AC10030 3.0 105 60.5 16.0 1.886AC15025 2.5 155 62 23.0 2.046AC15030 3.0 155 63 23.5 2.455AC20025 2.5 205 76 25.0 2.602AC20030 3.0 205 77.5 25.0 3.122AC25025 2.5 255 76 25.5 2.947AC25030 3.0 255 77 26.0 3.537AC30025 2.5 300 109 30.0 3.760AC30030 3.0 300 110.5 30.0 4.512AC35030 3.0 350 125.5 30.0 5.163AC40030 3.0 400 125.5 30.0 5.569

note:Dimensionsinthesepurlintablesarenominal.ForthelatestsizesandDownturnedlipsizes refer to the Permalite Aluminium Rollformed Purlin Solutions manual.

Permalitealuminiumpurlinswithdownturnedlipsarealsoavailable.Refer Aluminium Rollformed Purlin Solutions manual for purlin dimensions


2.10 ConvEx CuRvEd RooFInGInadditiontoaestheticappeal,curvedroofingavoidstherequirementforaridgecapflashing.Thisisabenefitonlowsloperidgedroofs.

Sheetmaybecurvedoverthefullwidthoftherooforcurvedonlyat the ridge. Curved sheet at the eaves may also form effective sun control, roof drainage or cyclonic security.

There are three methods of curving sheet:

1)Springcurving–Straightsheetisheldtotheroofcurvebythefixingscrews,allpurlinsmustbesetat90°tothearctangentandthereshouldbenocurvebetweentheeavepurlins.Endlapsmaybeusedon straight roof sections only.

2)Crimpcurved–Thisfactoryprocessformsacurvebycrimpingtheprofileatcontrolledintervalsprovidingastrikingvisualeffectanda small radius of curvature. Concave curves may also be supplied. Crimp curved ridge caps are recommended on the basis of their superiorstrengthandlowercostcomparedtotheridgecapflashingsystem.

3)Rollcurving-ThisfactoryprocessisonlysuitableforWaveline.

Figure 2.8Calculation of radius

Figure 2.10Seal length calculation

Rise

Width

Radius

Radius = Width2 + 4(Rise)2

8 x Rise

Radius

Seal lengthmeasured on roof

Seal length = 0.035 x Radius x specified minimum roof pitch,therefore use the following formulas for Permalite claddings.

Waveline(minmum roof pitch 5): Seal length = 0.18 x radius

V-Rib(minmum roof pitch 3): Seal length = 0.11 x radius

LT7 and Alspan(minmum roof pitch 1): Seal length = 0.055 x radius

Table 2.12 Recommended radii for convex spring-curving

Alspan (Spring curve) 24 1600 200

LT7 (Spring curve) 18 1400 60

LT7 (Crimp curve) 0.5 1400 60

V-Rib (Spring curve) 18 1400 70

Waveline (Spring curve) 12 1000 30

Waveline 762 (Roll curve) 0.6 1000 30

Minimum Curving Radius

2.11 sPRInG CuRvEd RooFs

Sheetsinaspring-arched(convex)roofarecurvedinaradiusfromeave to eave. LT7, ALSPAN, V-RIB and WAVELINE can be spring-curvedforanarchedroof.Table2.12showstheacceptableradii.

Thetopfaceofallpurlinsmustaccuratelyfollowandbetangentialtothe radius of the arch. The radius of curvature can be calculated from the formula in Figure 2.9

2.12 CondEnsATIonCondensationoccursontheundersideofallmetalroofingwhentheroofmetaltemperaturefallsbelowthedewpointofhumidairheldagainst the underside of the roof.

Control of under roof condensation can be affected through the reduction of the moisture content of the air under the roof by one or moreofthefollowingprocedures.

a)Providingampleventilation,whichallowsairtomovethroughtheceiling space.

b)Usingceilingliningswithamoisturebarrierontheuppersurface.

c)Stretching50mminsulationblanket,withaluminiumfoillaminatedtotheunderside,overthepurlinsbeforelayingtheroof.Alljoinsintheblanket,andaroundpenetrations,shouldbesealedwithwaterproofadhesive tape.

Oftheaboveb)providesthebestceiling/roofcondensationcontrol.Althoughc)maybelesseffectiveincontrollingceilingcondensationitsignificantlyreducestheeffectofroofnoise.

Consideration should also be given to the effect of condensation on theundersideofexposedexteriorroofingsuchaseavesorawning.Theunsightlydiscolourationwhichcanoccurmaybeavoidedbyplacingaliningunderneathwitha100mmairgapbetweentheliningand the metal roof. Alternatively, painting the underside of the roof sheetingwillretarddiscolourationbutnotcondensation.

Figure 2.9Reversedprofile

2.13 REvERsEd PRoFILEAvariationtotheappearanceofwallscanbemadebyfixingLT7orAlspanwiththepansouttherebycreatingaboldeffect.However,designcapacities,maybeadverselyaffected.

Note: Not suitable for cyclonic regions. Contact Permalite® technical staff for further advice.

Toensureanadequatesealagainstmoistureingressthefollowingformula should be applied to determine the minimum seal length forlowpitchedsprungcurvedroofswithapexjoins.Aneutralcuresilicone sealant should be applied as per Section 3.10. Typical roof andwalllappingisshowninFigures3.6and3.7..


2.15 GEnERAL RAInWATER sysTEM dEsIGn RECoMMEndATIonsThe Minimum gutter fall should be 1:200 for effective gutter operation and prevention of ponding.

Gutterlengthsshouldnotexceed12.0metres,onsitejointswithinthislengthshouldbeasrecommendedherein.Bridgeexpansiongapwithanaluminiumsaddleflashingfixedtoonegutteronly.

2.14 dEsIGn oF dRAInAGERoof drainage systems can be affected by a number of variables and must be designed and detailed by a suitable qualified trade or professional. The design of roof drainage aims to protect people, property and the building. The designed drainage system must be installed under the supervision of a qualified trade or professional. The steps of the design process are illustratedbelow.

1.Determineaveragerecurranceinterval(ARI)

2. Obtain rainfall intensity of site

3. Work out roof dimensions.

4.Determinecatchmentareawithslope

5.Determineareaforproposedeavesgutter.

6.Determinecatchmentareaperdownpipe

7.Determinenumberofdownpipesrequired

8.Determinelocationofdownpipesandhighpoints

9.Checkcatchmentareaforeachdownpipe.

10.Determinedownpipesize

11.DetermineoverflowmeasuresMoreguidanceisgiveninBCA,AS/NZS3500.3:2003,HB114:1998andBluescopeLysaghtpublication-Roofing&WallingInstallationManual.

Table 2.14 Maximum lengths for drainage (m)

V-Rib®

Intensity (mm/hr) 15º 20º 25º15º 20º 25º 3º 5º 7.5º 10º

100 161 200 239 275150 107 134 159 183200 81 100 120 137250 64 80 96 110300 54 67 80 92333 48 60 72 83500 32 40 48 55

Roof Slope (degrees)LT7®

Intensity (mm/hr) 1º 2º 3º 5º 7.5º 10º

15º 20º 25º1º 2º 3º 5º 7.5º 10º

100150200250300333500

Roof Slope (degrees)

Waveline®

Intensity (mm/hr) 5º 7.5º 10º 15º 20º 25º

100150200250300333500


90 111 131 163 194 22360 74 87 108 129 14945 56 65 81 97 11136 45 52 65 78 8930 37 44 54 65 7427 33 39 49 58 6718 22 26 33 39 45

Alspan®

Intensity (mm/hr)

100150200250300333500


23 28 32 35 39 4215 18 21 23 26 2812 14 16 18 20 219 11 13 14 16 178 9 11 12 13 147 8 10 11 12 135 6 6 7 8 8

304 338 367203 225 245152 169 183122 135 147101 113 12291 101 11061 68 73

247 274 298165 183 198123 137 14999 110 11982 91 9974 82 8949 55 60

357 445 522 649 774 890 985 1095 1188238 297 348 433 516 593 657 730 792179 222 261 325 387 445 492 547 594143 178 209 260 310 356 394 438 475119 148 174 216 258 297 328 365 396107 134 157 195 232 267 296 329 35771 89 104 130 155 178 197 219 238

Table 2.13 design rainfall intensity


2.17 RooF sLoPEsMinimum Onverylowslopescaremustbetakentoensurethatpurlinsagormisalignmentdoesnotresultinwaterpondingontheroof,particularlyif end laps are used.

Atlowslopes,sayaround1in50(1°)slope,allroofsupportsmustbein the one plane because slight variations can result in zero or negative fall. This may occur even after completion of the building as the result ofsettlement,timberwarpingorshrinking,orextraloadings(likeairconditioners).

Minimum recommended roof slopes are listed in this document. As a guide,whereverpossible,youshoulddesignforaminimumslopeof1in30(2°).Roofslopeslowerthantherecommendedminimummaybeavailablesubjecttoenquiryandwillbedependentupontheroofapplication and building details.

MaximumThehighdischargevelocityofrainwaterfromslopesover25°canresultinsidelapleakage.Wheretheslopeexceeds25°,acontinuousrun of silicone sealant is to be placed under the outer leg of the side lap during sheet installation.

Table 2.15 Roof slopes LT7 Alspan v-Rib Waveline Minimum slope -noendlaps 1º 1º 3º 5º Minimum slopes -sealedendlaps 3º 3º 6º 5º Minimum slope - unsealedendlaps 6º 6º 10º 5º Maximum slope - unsealed sidelaps 25º 25º 25º 25º

CUSTOM ORB

Figure 2.13 V-Rib turn-up tool

Figure 2.11 Box gutter detail

Turning-up WavelineWithpliers,multi-gripsorashiftingspannercloseddowntoapproximately 2mm, grip the valley corrugations 20mm in from the end of the sheet and turn up as far as possible. Be careful not to tear the sheet.

Turning-up v-RIb, Alspan and LT7Slide an appropriate turn-up tool onto the end of the sheet as far as it willgo.Holdingthetoolagainsttheendofthesheet,pullthehandletoturnupthetrayabout80°.

V-Rib Turn-up tool

Figure 2.12Turning-up Waveline

2.15.1 box GuTTERsBox gutters should be fabricated from aluminium sheet preferably ofalloy5251or5052andofthenextstandardthicknesstothethickness of the roof i.e. 1.2mm thick box gutter for 0.9mm thick roof. The minimum aluminium thickness for box gutters is 0.90mm.Refer to Figure 2.11 for typical aluminium box gutter detail.

Box gutters must be adequately supported on sides and bottom inconsiderationoftheirfullwaterload,andthepossibilityofbeingusedasfootways.BoxguttersshouldbedesignedandinstalledinaccordancewithAS/NZS3500.3:2003,AS/NZS2179.1:1994,HB114:1998andtheBCA.Generally,thesidesshouldbesupportedbyframeworkorpurlins,ifnot,sidesshouldbestiffened.

Fasteningtheguttertotheframeworkorpurlinsshouldonlybedoneat the outlet end. The remainder of the gutter should be free to move.

Overflashingsarenottobefastenedtothegutterandsaddleflashingsbetweengutterendsaretobefastenedtoonegutteronly.Fixings,supportsandoutletsmustallowcompletefreedomforthermalmovementofthegutter.Thegutterasawholemustnotberestrainedinanyway.

Dropsumpsshouldbeprovidedatoutletstoincreasetheflowefficiencyfromguttertodownpipe.Sumpsshouldbeasquarebythewidthofthegutterandhaveadepthofnotlessthanonequarterofthegutterdepth.Overflowsshouldbeprovidedbyspoutsatthegutter ends or by secondary sump outlets.

Eaveandboxgutterjoinsmaybemadeusingsiliconesealantprovidedthejoinconsistsofoverlappingsurfacesseparatedbysiliconesealantandfastenedbytwolinesofstaggeredrivets.

Blindrivetsusedtojoinguttersectionsmustbeofaluminiumonly,theheads of the rivets should be on the outer surface.

AlternativelyjointsmaybemadebyTIGAluminiumwelding;solderingor brazing is not recommended.

2.16 TuRn uP RooF CLAddInGAtthehighendofroofing,windcandrivewateruphill,undertheflashing or capping, into a building. To minimise this problem, you turnupthevalleys(orpans)atthehighendofroofing. (Theprocessiscalledturning-up(orstop-ending).

Allroofingonslopesbelow1in2(25°)shouldbeturned-up.Duringthe turn-up operation, care should be exercised to prevent tearing or puncturing the steel sheets. You can turn-up sheets before or after they are fixed on the roof. If you do the latter, you must have sufficient clearance for the turn-up tool at the top end of the sheets (about50mm).

Note:Tomaintainminimum1degpitchonAlspan/LT7,stepjointsshould be considered for sheets in excess of transportable length.(Figure3.4)


3.0 InsTALLATIon3.1 sAFETyItismostimportantforsafetyreasonsthatduringsheetlayingwalkingon the roof is reduced to an absolute minimum and along the purlins only. See Section 1.14 Walking on Roofs.

3.2 PREPARATIon Before commencing to lay the sheet, consideration should be given to theinstallationofgutterandeaveflashings,insulationandthelocationof roof penetrations such as vents, skylights etc.

A pencil of any colour may be used except black or so-called lead pencils.Don’tuseblackpencilstomarkroofingorwallingbecausethegraphitecontentcancreateanelectriccellwhenwetandthuscausedeteriorationofthefinish.Youcanalsouseastringlinewithchalk dust, or a fine, felt-tipped marker.

3.3 sQuAREnEss Checktherooforwallstructureforsquarenessbeforecommencingtolaysheet.Sheetmustbelaidsquaretotheridgewhereverpractical.Out-of-squarewhichexceeds100mmoverthesheetlengthshouldbe corrected by trimming the edge of the sheet laid against the out-of-square edge. Any sag of purlins should be corrected before commencement,particularlyonlow-pitchroofstoavoidwater“ponding”.

Ifinsulationistobelaidonwiremesh,themeshshouldbelaidfirst.Insulationshouldbelaidwiththeroofingtoavoidthepossibilityofrainwettingtheinsulation.

3.4 PuRLIn IsoLATIonIn most situations the face of a dissimilar metal or timber support, againstwhichthesheetingisfastened,istobepaintedwithchromatebasedprimers/bituminouspaintorgoodquality(andappropriatewidth)adhesivePVCorpolyethylenetape.

3.5 shEET InsTALLATIonCustomary practice is to lay out an area of sheet and secure each sheetwithacrestfasteneratthecentreoftheendsandmiddle,atthesametimecheckingtheprofiletoavoidprofilespread.Theareaofsheetlaidoutshouldbenomorethanthatwhichcanbefullyfixedwithinthedayoflaying.Whentheareaofsheethasbeenlaid,install side lap fasteners and then the balance of crest fasteners. See Sections3.15-3.18.

Wherever possible commence laying the sheet farthest from the expecteddirectionoftheheaviestrainorwindandfromtheeavetowardtheridge.

The top end of the sheet should be not more than 100mm from the ridgeorfascialineandthebottomendshouldextend50mmintothe gutter. The ridge and eave ends are to have the pans upturned anddownturnedrespectively.Endformingtoolsareavailableforthispurpose.Roofslopesgreaterthan25°requiresidelapsealing,withacontinuous run of silicone sealant.

3.6 shEET CuTTInGWherepossible,youshouldminimisesite-workbyusingsheetscuttolength in the factory. Aluminiumisbestcutwithawax-lubricatedfinetoothcircularsaw.

3.7 WALL CLAddInGWhereverpossible,commencefixingfarthestfromtheexpecteddirectionoftheheaviestwindorrain.Wheremorethanonelengthisusedforthewallheightanoverlapof100mmshouldbeallowedatagirtwiththeuppersheetoverlappingthelowerasforroofingendlaps.

Fornoncyclonicapplications,thesheetishardfixedtogirtsthroughthepannexttotheribusingthescrewsasnominatedinTable3.1.AdditionallyRA018StitchingscrewsorBulb-titerivetsarerequiredatlapribsforLT7andVRibprofilesatpurlinsandequalmidspanpointsbutnotexceeding500mmspacing.

Forcyclonicapplicationswallsheetingshallbeinstalledaspercyclonicroofsheeting(iewithwasherateachrib)

Note:ExpansionfixingnotesareatSection3.16ofthisManual.

3.8 PosT PAInTInGManual post painting is generally not recommended. Where there is nootheroption,weadvisethefollowing:

Flashingswhicharetobepaintedbytheinstallershouldfirstbewashedwithhouseholddetergentanddried.Theflashingisthenpaintedwithanetchprimerandfinallybrushpaintedwiththecolourcoat.

Standardcoloursmaybeobtainedonenquirytomajorpaintmanufacturers.

Touch up of scratched to pre-painted sheet should be by brush only. Spray paints may fade prematurely.

3.9 TRAnsLuCEnT shEETInGTranslucentfibreglasssheetisavailableinthePermalite LT7®, Permalite Alspan®, Permalite Waveline® and Permalite V-Rib® profiles.

Therecommendationsforendlappingroofingsheetapplyalsototheplacement of translucent sheets into a roof.

BecauseofslightdifferencesinprofilealloverlappingsurfacesshouldhaveflexiblesiliconesealantorfoamtapeplacedbetweenthemandthesidelapsshouldbefastenedwithBulb-Tite® fasteners or similar at not more than 400mm centres. Fasteners must have a sealing washerunderthehead.Allribsattheendsofthesheeting,andalternateribsatintermediatepurlins,aretobefastenedwithcrestfastenersandwashers.Refertothemanufacturer’sinstructionsforfurther details.

3.10 sEALAnTsSiliconesealantsusedwithaluminiumsheetingmustbeneutralcure,howeverinsomeroofingapplicationsanon-curingsealantmayberequired.(PleaserefertoPermalite®foradvice.)Neutral-curesiliconesealants have good adhesion to the clean surface of all our roofing andwalling.Theyarewaterresistantandnon-corrosive; and areresistanttoextremesofheatandcoldwhileretaininggoodflexibility. In addition they are excellent gap fillers and provide high resistancetoultra-violetrays(sunlight)andhavealongservicelife.

NOTE:• TheyareNOTadhesives.

Figure 3.1 Commencing installation


2. Taptite® screws RA015 must not be installed with impact driver-type screw guns and driving speed should not exceed 300rpm as this may damage the screw threads

Table 3.1 Use of FastenersFixed to: LT7 Alspan V-Rib Waveline

Crest fixed to steel greater than 15mm (note Pilot hole requirement as per Table 3.2 )

**RA01514-24x65

**RA01514-24x65

**RA01514-24x65

Crest fixed to steel less than 15mm but greater than 3mm (note Pilot hole requirement as per Table 3.2)

RA11514-14x70

RA11614-14x90

RA11514-14x70

RASH145014-14x52

Crest fixed to steel less than 3mm but greater than 0.75mm or aluminium less than 5mm but greater than 3mm

RA11514-14x70

RA11614-14x90

RA11514-14x70

RASH145014-14x52

Crest fixed to steel between 0.42mm and 0.75mm or aluminium between 1mm and 3mm (note Pilot hole requirement as per Table 3.2)

RA20614-11x70

RA20714-11x90

RA20614-11x70

RA20514-11x52

RA20614-11x70

RA20714-11x90

RA20614-11x70

RA20514-11x52

**RA01014-10x75

**RA01914-10x90

**RA01014-10x75

**RATH145014-10x50

Valley fixed to steel greater than 3mm (note Pilot hole requirement as per Table 3.2)

RA11414-14x31

RA11414-14x31

RA11414-14x31

RA11414-14x31

Valley fixed to steel less than 3mm but greater than 0.75mm or aluminium less than 5mm but greater than 3mm

RA11414-14x31

RA11414-14x31

RA11414-14x31

RA11414-14x31

Valley fixed to steel between 0.42mm and 0.75mmor aluminium between 1mm and 3mm(note Pilot hole requirement as per Table 3.2)

RA01812-11x20

RA01812-11x20

RA01812-11x20

RA01812-11x20

Valley fix to steel between 0.42mm and 3mm or aluminium less than 5mm but greater than 3mm - Low wind applications eg soffits & ceilings

RA11010-16x19

RA11010-16x19

RA11010-16x19

RA11010-16x19

Valley fixed to timber RA00914-10x25

RA00914-10x25

RA00914-10x25

RA00914-10x25

Sidelap Fastening *RA01812-11x20 N/A *RA018

12-11x20 N/A

Flashings to roof sheet *RA01812-11x20

*RA01812-11x20

*RA01812-11x20

*RA01812-11x20

Flashings thru roof sheet to supports

* Full aluminium Rivets may be used in lieu of RA018 screws. Permalite recommend tri-fold rivets** Nominated screw is being phased out - contact Permalite for availabilityPilot holes are to be drilled in accordance with Table 3.2.

As per crest fix fastener for sheet

Crest fixed to timber (note Pilot hole requirement as per Table 3.2)

3.11 FAsTEnER InFoRMATIon


3.12 InsTALLATIon InsTRuCTIons3.12.1 ordering sheetThe quantity and length of sheet should not be determined from drawingsbutfromactualmeasurementsofthestructuremakingdueallowanceforsquarenessofthestructure.Wheresheetsaretobelapped,theminimumlaplengthontheunderlappedsheetwillbe 300mm and must occur over a support. The longest sheet to be used is 23 meters. Requirements in excess of this 23m length are to be met by end lapping sheets or providing a step in the roof. An additional50mmistobeallowedforgutteroverhang.Rememberthat lengths that exceed 12.0 metres may incur additional transport costs.Table 3.3 use of washers LT7 Alspan v-Rib WavelineFormedwasher RA023 RA137 BP082 RAWLCYCPHardfixRibseal RA036 RA039 RA039 RAWLCYSW Expansion Fix Rib seal RA033 RA041 RA041 RAWLCYSWNOTE:Hardfixtop9mofeachsheet.

Table 3.4 Rib Fasteners ( per metre of purlins) - non cyclonic LT7 Alspan v-Rib* WavelineIntermediatePurlins 4.5(1) 4.6 6.0 7.0Eave/RidgePurlins 7.8 4.6 10.0 7.0SidelapstitchingRA018(2) 3.4 2.3 2.2 2.3Girts 4.5(1) 4.6 6.0 7.0*V-Rib:5fasteners/sheet1.Basedonfixingalternateribs.2.Basedon1.5metrepurlincentres,tobeincreasedproportionallyforeach500mmincreaseinpurlincentres.

3.13 FAsTEnInGsScrewgunswithadepthsensitivenose-pieceshouldbeusedtoensurethatscrewsareproperlysetandnotoverdriven.Over-drivingofscrewscanleadtostrippingofscrews,deformationofsheetingandpotentialwaterleaks.(Figure3.2)AllTaptite®screwsmustbedrivenintoapre-drilledholewithascrewgunatamaximumspeedof300r.p.m.Note:ImpactdriverscrewgunsshouldnotbeusedwithTaptite®screws.

3.14 FIxInGsPermalite®providesarangeoffixingscrewsandwasherstoprovideallaspectsoffixingtheroofingsheetandflashings.ThespecificationoffixingssuppliedbyPermalite®isaimedatmatchingthedurabilityoftheroofingsheet.Purchaseofinferioralternativesfromothersourcesshould be avoided.

3.14.1 Crest Fasteners – The Permalite® Positive Fix system providesfullsecurityagainstwindupliftandwaterpenetrationwhilstatthesametimeallowingmovementoftheroofsheetingandroofstructure due to thermal expansion or contraction.

3.14.2 valley Fasteners –usedmainlyforwallfixingtogirts,thestainlesssteelfastenerswithanaluminium/epdmbondedwasherarehardfixedintothegirts.(RefertoTable3.5FastenerSpecifications).

3.14.3 Flashing and side Lap Fastening – the RA018 self-drilling stainlesssteelscrewfastensaluminiumsheetingandflashingsfirmlytogether.

FullaluminiumrivetsmaybeusedinlieuofRA018screws.Use4.8mm rivets for non-cyclonic regions and 11.9mm Bulb-tite® rivets for cyclonic regions.

3.14.4 non cyclonic fasteners - roof cladding

3.14.4 Cyclonic fasteners - roof & wall cladding

3.14.5 non cyclonic fasteners - wall cladding

PERMATITE V-RIB 5 Fasteners with formed washers per sheet width

PERMALITE ALSPAN 4 Fasteners with formed washers per sheet width

PERMALITE LT7 Fasten alternate ribs (Do not fasten overlap ribs unless all ribs are fastened. s=side lap screw)

PERMALITE WAVELINE 762 5 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.)PERMALITE WAVELINE 990 7 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.)

PERMATITE V-RIBFasten all ribs with formed washers

PERMALITE ALSPAN Fasten all ribs with formed washers

PERMALITE LT7 Fasten all ribs with formed washers (s=side lap screw) Fixing to purlin may be omitted at overlap ribs.

PERMALITE WAVELINE Fasten alternate ribs with cyclonic washers. (Fasten at overlap ribs.)S= Side lap fasteners as per Section 3.18.

Non cyclonic fasteners Cyclonic fasteners

PERMATITE V-RIB 5 Fasteners with formed washers per sheet width

PERMALITE ALSPAN 4 Fasteners with formed washers per sheet width

PERMALITE LT7 Fasten alternate ribs (Do not fasten overlap ribs unless all ribs are fastened. s=side lap screw)

PERMALITE WAVELINE 762 5 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.)PERMALITE WAVELINE 990 7 Fasteners per sheet at alternate ribs. (Fasten at overlap ribs.)

PERMATITE V-RIBFasten all ribs with formed washers

PERMALITE ALSPAN Fasten all ribs with formed washers

PERMALITE LT7 Fasten all ribs with formed washers (s=side lap screw) Fixing to purlin may be omitted at overlap ribs.

PERMALITE WAVELINE Fasten alternate ribs with cyclonic washers. (Fasten at overlap ribs.)S= Side lap fasteners as per Section 3.18.

Non cyclonic fasteners Cyclonic fasteners

NOTES: 1. Side lap fasteners are not required for Alspan or Waveline. 2.Screwscanbeplacedoneveryribtogetbetterwindpressurecapacity..


Rooffurniture(forexamplevents,walkways,etc.)shouldmakeallow-ancefortheroofsheetingtoexpandandcontractwithintheexpan-sion zone, and must not be installed over endlaps.Forlowpitchedroofsandrooflengthsinexcessof60mconsiderationshouldbegiventostepjointstoprovideexpansioninadditiontoexpansionfixingrequirements.Allflashingrunsover9mshallmakeallowanceforexpansion.Eachlapwithintherunshallbesealedwithanon-curingsiliconesealanttoallowformovement.Lapfastenersshallhavetheupperflashingpre-drilledwitha7mmholeasperFigure3.8.Forexamplesoftypicalhard/expansionfixingroofsheetinglayouts,refertoPermaliteRoofingAppendix,whichcanbefoundat www.permalite.com.au.Wall claddingNoncyclonicwallsheetsmaybepan“Hard”fixedupto23minlengthusing fasteners as per Table 3.1. Cyclonicwallsheetsmustbecrest“Hard”fixedwithwashersupto23minlength.Longlengthsofflashingsmaylikewisebe“Hard”fixed.Howeverinregionsofhightemperaturevariationsitisadvisabletoconsiderexpandingsheetingholesto7mmforbothflashingandwallsheeting applications.

3.15 PIERCE-FIxEd RooF FIxInG The Permalite® Positive Fix System provides for thermal expansion oftheroofingsheetby“hard”fixingatthetopofthesheetslopewith“expansion”fixingbeingusedtoaccommodateexpansiontowardsthelowerendofthesheetslope.

Forbothtypesoffasteningthescrewshouldbescreweddownuntilitpressesonthewasherwithamediumpressure.Undernocircumstancesshouldthescrewbeovertightenedtothepointwheretheformedwasher,orthebondedwasherunderthescrewhead,commence to distort.

3.16 TyPEs oF PIERCEd FIxInGshard Fixing“Hard”fixingisusedwheresheetlengthsaresuchthatthermalexpan-sionisnotasignificantissueie9morless.(6mforwaterreserviors)Appropriate pilot holes are required to be drilled through the sheet and purlinwhencertainfastenersareused.RefertoTable3.2forpilotholerequirements and sizes.The hole in the Permalite sheeting should then beenlargedto6-6.5mmdiameterafterwhichthefastenerisinstalled.Inapplicationswhereselfdrillingscrewsareused,thena 6-6.5mmdiameterholeshouldbedrilledthroughthesheetpriortoinstallationofthefastener.(Figure3.4)Expansion fixing Forrooflengthsinexcessof9m,“Hard”fixingisusedforthefirst9mfromtheridgeorskillionhead.(Inwaterreserviors,thisdimensionisreducedto6m).Expansionfixingisusedfortheremainderofthesheetlengthandfollowsthesameprocedureashardfixingwiththeexceptionthat the hole in the rib crest is slotted after drilling the tapping hole, us-ingtoolRA165forLT7,AlspanandV-Ribprofiles.(Figure3.4)OnlargeprojectscontactyourPermalite®salesrepresentativeregardinguseofthistool(RA165).NotethatforexpansionfixingarubberwasherwithanelongatedholeandTeflonfacingononesideisused.ThiswashermustbeinstalledwiththeTeflonsidefacinguptowardtheheadofthescrew.Ensurethefastenerisinstalledinthecentreoftheslot.For Waveline, expansion is provided by drilling an 7mm hole in lieu of slots noted above.

Use Permalite slotting tool to create slot hole in sheeting

Figure 3.4: Permalite® Positive Fix fastening system

Figure 3.3Itisimportantthatyousetscrewscorrectly


Pierce-fixedthrough crest

Pierce-fixedthrough pan

Self-drilling screwswith EPDM sealing washer next to ribs

Spacing varies fordifferent profiles.

Non curing silicone sealantor foam tape may be

required. Refer table 2.13

300mm minimum 60mmmin.

40mm minimum

60mm minimum

3.18 sIdE LAPsWhenrequired,allsidelapfasteners(RA018orfullaluminiumrivets)shouldbeinstalledafterthesheetistemporaryfixedandbeforeall crest fasteners are installed. The fasteners are placed in the centreoftheribcrestandatequalspacingsbetweenpurlinsbutnotexceeding500mm.Wheninstallingthefasteners,placeonefootontheoverlappingribstoensuretheyarefirmlytogether.

3.17 End LAPsWhenendlapsareusedthelowersheetsarefixedfirst,withoutholes being drilled for fasteners to the purlin at the top of the sheet slope.Whenthenextsheetuptheroofslopeislaidthesheetisfirsttemporarilysecuredfromtheupperendtowardstolower.Wherethesheet overlaps the previously laid sheet, the end of the top sheet is liftedandtheribcrestslottedusingspecialslottingtoolRA165.Thetopsheetisloweredandapilotholedrilled,atthecentreofthetopsheetslot,throughthelowerribintothepurlinwiththefastenerthenbeinginstalled.Thismethodologyensuresthetopsheetisexpansionfixedandthelowersheetishardfixed.(Figure3.7)EndlapsforWavelinecanhave an 7mm pre-drilled hole through the crest of both sheets.

NOTE: the overlapping sheets should not be rib crest slotted together. (Figure3.7)

Figure 3.6 Typicalroofandwalllapping.

Figure 3.5Stepjointdetail

Screw with 16mm bonded washerAluminium formed washerEPDM/ Teflon flatwasher with slotSlotted hole inupper sheet Upper sheet

Lower sheetNon-curing sealant(or foam tape)if requiredSeperation taperequired when purlin is not aluminium

Seperation taperequired when purlin is not aluminium

6-6.5mmpre-drilled holeSheet support

Sheet support

Line up flashing lap withsheeting expansion lap and fix through 7mm pre-drilled pilot holes

Sealant under flashing

Figure 3.7Typical Expansion Endlap Detail

Figure 3.8 Typical Longitudinal Flashing Endlap Detail

250 mmminimum overlap

Baffle flashing.Notch overribs & fasten tounderlappingsheet

25 mm min.clearance

300 mm

Trays turned up

Depth ofsheeting

plus15 mm

Foam infillSheetingturned down

under 3º pitch


LT7®

3.19 Fastener Specifications

** *RA01014X75hex.headstainlesssteelType17screwwithaluminiumbondedwasher

** *RA01014X75hex.headstainlesssteelType17screwwithaluminiumbondedwasher

RA01812X20 hex. head stainless steel stitchingscrewwithaluminiumbondedwasher

RA01812X20 hex. head stainless steel stitchingscrewwithaluminiumbondedwasher

** *RA01514X65hex.headstainlesssteelTaptite®selftappingscrewwithaluminiumbondedwasher*


RA02357x20mmaluminiumformedwasherwith6mmdiameterhole

bP8257x27mmaluminiumformedwasherwith6mmdiameterhole

RA03345X20x2mmEPDM/Teflonflatwasherwithslot.Teflonfacedonone side

RA04150X25x2mmEPDM/TeflonflatwasherwithslotwithTeflonfaceonone side.

RA03650X20x2mmEPDMflatwasherwith6mm diameter hole


RA114 14X31 hex. head stainless steel Teks®selfdrillingscrewwithaluminiumbondedwasher




v-RIb®

*NBmustbeinstalledatspeedsof300rpmorLower.ImpactdriversarenottobeusedtoinstallTaptite®Screws.**Nominatedscrewisbeingphasedout-contactPermaliteforavailability

6-037-0022-4 14-10 x 25 Hex Head Stainless Steel Grade 304 T17 with 16 mm ABW




6-117-0008-2 12-11 x 20 Hex Washer Stainless 316 Stitch Screw






RA00914X25hex.headstainlesssteelType17screwwithaluminiumbondedwasher


RA20614x70Roofzipwithaluminiumbondedwasher


6-037-0063-3 14-11 x 70 Hex Head Grade 316 Stainless Zip Pt with 16 mm ABW






Washer Specifications


WAvELInE®ALsPAn®







**RA01914X90 hex. head stainless steel Type 17screwwithaluminiumbondedwasher

** RATh145014X52hex.headstainlesssteelType17screwwithaluminiumbondedwasher


RA01812X20 hex. head stainless steel stitchingscrewwithaluminiumbondedwasher RA018

12X20 hex. head stainless steel stitchingscrewwithaluminiumbondedwasher

RA13765x30mmaluminiumformedwasherwith6mmdiameterhole

RAWLCyCPWaveline stainless steel cyclonic plate(AvailableseparatelyorasWavelokassemblywithscrew,washerandformedwasher.)

RA04150X25x2mmEPDM/Teflonflatwasherwithslot.Teflonfacedononeside

RAWLCysWWavelinecyclonicsealingwasherforundercyclonicplate(Hardfixonly)



RA114 14X31 hex. head stainless steel Teks® selfdrillingscrewwithaluminiumbondedwasher RA114

14X31 hex. head stainless steel Teks® selfdrillingscrewwithaluminiumbondedwasher

RA116 14X90 hex. head stainless steel Teks®selfdrillingscrewwithaluminiumbondedwasher RAsh1450

14X52hex.headstainlesssteelTeks®selfdrillingscrewwithaluminiumbondedwasher













*NBmustbeinstalledatspeedsof300rpmorLower.ImpactdriversarenottobeusedtoinstallTaptite®Screws.**Nominatedscrewisbeingphasedout-contactPermaliteforavailability



4.0 Flashings

4.1 Purpose of flashingThepurposeofaflashingistodivertwaterawayfromanypointofentry,andtomakeanybuildingweatherproof.Flashingsandcappingsarestripsofmetalformedtoweatherprooftheedgesofroofingandwalling. For the purposes of this chapter, only the term flashing is used. Thefollowingsectionsshouldbeconsideredasaguideonly. Foracomprehensiveaccountofflashingguidelines,refertoHB39-1997.Similar methods of flashing are used for different cladding-profiles. You can adapt the principles to suit your application. In all cases it is important to have ample cover provided by the flashing and proper turn-up of the cladding underneath.Becarefulwhenmovingbetweensupports.Donotwalkontheridgeimmediatelyadjacenttoflashingsortranslucentsheeting.Walkatleastonepanaway.Flashingsarenotonlyrequiredtoprovideweather-resistancethemanyjunctionsonarooforwallstructure,butarealsoaveryvisiblepartoftheroofandwallcladdingdesign,andperformanimportantroleintheaesthetic appearance of the building.Experienceisrequiredtodesign,cutandfastenflashingsthatwilllastthelifetimeoftherooforwallcladding,andspecialistassistanceshouldbesoughtwherethisexperienceisnotavailable.Allflashingsmustbedesignedtopreventpondingofwaterorbuild-upofdebris.Flashingsmustbedesignedtoprovideweather-resistancefortherooforwallcladdingwithoutrelianceonsealantastheprimemeansofprovidingweather-resistance.

4.2 Flashing Materials

It is very important that flashings be made from materials that are compatiblewiththecladding(ReferTables2.9and2.10).Leadflashingisnotrecommended,howeveritwillusuallyberetainedwhenre-roofing,becauseitisusuallycementedintothestructure.Inthese cases:

• thetopsurfaceoftheleadflashingmustbepaintedwithagoodqualityexteriorpaintsystem(tolimitcontaminationwithleadcompoundsinwaterrunningofftheflashing);and

• theremustbeabarrierbetweentheleadflashingandthecladding:eitheraplasticstrip(suchaspolythenedampcourse),orpaint.

FlashingsshouldconformtoAS/NZS2179.1:1994,andbecompatiblewiththecladding(ReferTables1.3and1.4).Materials for flashings are available in Mill or Painted finishes. 4.3 Roof Flashing For the purposes of this chapter, only the term flashing is used. Thefollowingsectionsshouldbeconsideredasaguideonly. Foracomprehensiveaccountofflashingguidelines,refertoAS/NZS3500.3:2003.

Similar methods of flashing are used for different cladding-profiles. You can adapt the principles to suit your application. In all cases it is important to have ample cover provided by the flashing and proper turn-up of the cladding underneath.

Thecorrectinstallationofflashingstosealtheroofperimetersorpenetrationsisessentialtothesecurityandweathertightnessoftheroof.Considerationshouldbegiventomovementbetweentheroofandbuildingwallsandtolengthexpansionofflashings.(Figure3.8)

Figure 4.4Barge flashing

Figure 4.5Longitudinal flashing

Permalite®isabletosupplyarangeofflashingswhichareprovidedtothesamemetalspecificationastheroofingsheet.Wherecustommadeflashingsarerequiredthemetalshouldbetothefollowingspecification.

Alloy: 5251/5052preferred,(5005alternatively*)Temper: H38Thickness:0.90mmBendRadius: 0.9-1.2mm-1.5-2twhere‘t’representsthickness

of material unpainted sheet. 0.9-1.2mm4-6twhere‘t’representsthicknessof

material pre-painted sheet

*Permalitewarrantieswillnotapplyto5005material.


4.4 barge FlashingTheinstallationofthisflashingmustallowformovementbetweentheroofsheetingandthewallparalleltotheedgeofthesheeting.Thefollowingfixingproceduresarerecommended.

NOTE: Where overlaps occur on the roof a corresponding overlap is tobemadeinthebargeflashing.

Becarefulwhenmovingbetweensupports.Donotwalkinthepanimmediatelyadjacenttoflashingsortranslucentsheeting.Walkatleastonepanaway.

Permalite® supplies custom flashings to your requirements – ask your local service centre for details.4.5 Longitudinal flashingsThe pans or valleys, and are made to suit the cladding profile. They shouldhaveanedgeturned-downtodipintothepanorvalley. The minimum recommended cover of longitudinal flashings over cladding shouldbetakenfromAS/NZS3500.3:2003.4.6 Transverse flashingsTransverse flashings run across the pans or valleys. They usually haveastiffeninglip,alongtheloweredge,whichisturned-downtodipintothepanorvalley.Tomaximiseweatherproofing,thebentlipis fashioned to fit the profile.Theturn-downfortransverseflashingsforWavelinecanbefashioned to fit the profile by either notching or scribing to match the corrugations, or lightly dressed into the valleys. The type of fashioning(ifany)dependsuponprofileshapeandthetypeofmaterialusedtoflash.Fashioningispreferredforlow-sloperoofs.Theturn-downfortransverseflashingsforwidepannedcladdingisalwaysnotchedorscribedtofitovertheribs.4.7 Flashing CoverPermalite® can produce a range of flashings to suit your needs and design(hip,barge,apron).Toincreaseweather-resistance,Permalite® recommendsyoumaximisetheoverlapbetweenflashingsandcladdings.4.8 Fixing of FlashingsLongitudinalflashingsshallbefastenedatmaximum500mmcentres.TransverseflashingsshallbefastenedinaccordancewithAS/NZS3500.3:200.4.9 Flashing at lapsA lap is that part of a flashing that overlaps or covers any portion of the same shaped component, and is variously described as an end lap, overlap or underlap.Lapsshouldcomplywiththefollowingcriteria:•anoverlapmustruninthesamedirectionasthewateri.e.downhill;•anoverlapmustrunovernotunder;•anoverlapmustbeacrossthefalloratashallowangle;•watermustflowoveralapnotintoit;•alapmustbeself-drainingandnotrelysolelyonsealant;•alapmustbemechanicallyfixed;•asealedlapmusthaveaminimumofwidthof25mm;

Follow roof screw pattern

Follow screwpattern for

sheeting



Follow screwpattern for

sheeting


Figure 4.9Smallpenetrationwithsleeve(Dektite®sleeveillustrated)

4.10 Flashing small roof penetrationsA flanged cylindrical sleeve is a fairly simple method of flashing around smallpenetrations(suchaspipepenetrations)whichfitbetweentheribs of a roof sheet, or penetrate only a single rib.The flange around the base of the sleeve can be contoured by hand to match the cladding profile before it is sealed and fixed to the cladding.Becarefulnottodamanyvalleysorpanssothatrainwatercandrainfreely from the high side of the roof penetration.

Figure 4.6Ridge capping

Figure 4.7Fascia capping

Figure 4.8Parapet flashing


4.11 Flashing large roof penetrationsPenetrationsthroughribbedcladdingblockthevalleys(orpans),andthusaffectthefreeflowofrainwaterdownaroof.Allflashingshavetoweatherproofthecladding–butontheuphillsideoflargepenetrations,theyalsohavetochannelrainwatersidewaysintovalleys that run unobstructed to the eaves.

Four methods are described here. In all methods the ends of cut ribsmaybeclosedoffwithcapsontheoutsideoftherib,orwithplugsinsidetheribs.Plugsmustbeusedonside-lapstoallowtheanti-capillary cavity to drain.

note: For masonry construction, building Code Australia (bCA) requires the use of damp Proof Course (dPC) to ensure weatherproofing. For acceptable methods see BCA section on weatherproofing masonry.

support framingWherever more than one of the sheet ribs are cut and is at a distance of 200mm or greater from the nearest support, you must provide framing to support the cut ends of the roof cladding each side of the penetration.

Existing flashingIf you have to re-use lead flashings that are built into the structure, special protection is needed.

Method 1: head gutter and apron flashingsThis is often the simplest method, and commonly used for existing protrusions.

Method 2: Flat tray and sleeveTo avoid fitting and sealing end caps to all the sheet ribs on the lowsideofthepenetration,anapronflashingcanbefittedtothesleeve and sealed to the tray each side.

Method 3: Tray gutter for steeper roofsIftheroofpitchismorethan,say1in12(5°),youcuttheroofcladdingsufficientlyhighabovethepenetrationtoallowatrayguttertoraiserainwateroverthetopofthesheetribsanddivertitaround the penetration.

Figure 4.10 Method 1: head gutter and apron flashings

Figure 4.11 Method 2: Flat tray and sleeve

Figure 4.12 Method 3: Tray gutter for steeper roofs

noTECarefulconsiderationistobemadeinrelationtocontraction/expansion of aluminium roof sheeting prior to designing the position of the roof furniture. Consult Permalite for further information.


Figure 4.13 Method 4: Flat tray and sleeve to ridge

4.12 notching with tinsnipsIf notching tools are not available, flashings can be notched to the rib profilewithtinsnips(Figure4.12).Theprocedureissometimesknownasscribing. After the cladding is fixed and the turn-ups finished, proceed as follows.• Placetheflashingwiththeturned-downedgerestingontheribs.• Markoutthenotchingusingatemplatepositionedovereachrib.• Cutthenotcheswithtinsnips.This procedure is also used for hip cappings.Fasteners for transverse flashingsYou must properly fix both flashings and the ends of all sheets.

Where the cladding is pierce-fixed through crests, and the position of thepurlinallowsit,thefastenersusedtofixthesheets,mayalsofixtheflashings.

On all other installations, pierce-fix your flashing to the ribs or crests of the sheets.

Joining flashingsTheoverlapsoftransverseflashingsshouldbesealedwitharecommended sealant and fastened. Before finally positioning and fixing the lap, turn over the top piece and apply a 3mm bead of sealant across the flashing, about 12mm from the end.

Figure 4.15Typical flashing at changes of pitch

4.13 Apron flashingsCladdingshouldnotfittightlydownontothehorizontalsurfaceofanyapronflashingasitwillretainmoistureandcollectdirtanddebrisandshouldhaveminimumclearanceof25mm.4.14 Gutter apronWhere the ends of roof cladding are exposed to contaminants such as sea salt or industrial pollutants it is better practice to provide an over flashingwhichdischargesintothegutterorspoutingforthefollowingreasons.(seeFigures4.14&4.15)

•Itprovidesameasureofprotectiontotheundersideoftheroofcladdingand the underlay.

•ItprovidessupportfortheroofingunderlaywhichissubjecttodamagefromwindandUV.

•Ifthereisnospoutingorithasalowfront.

•Itprovidesprotectionagainstwind-borneembers.

•Wheretheendsofroofcladdingareexposedinasevereenvironment,contaminants can be driven up the ribs of the cladding. Metal scriber flashings or filler blocks can be used to prevent or inhibit ventilation.

Theover-flashingshouldextend50mmintothegutterandtheunderlayfinishesonthedown-slopeoftheflashing.Ifthereisnoover-flashingtothe gutter the underlay should be extended into the gutter by a minimum of50mm.

Figure 4.14Gutterapron:Quad


5.0 InsulationInsummerbuildingsgethotfromthesunandwewanttocooltheinside;inwinterweoftenheattheinsideandwanttoavoidlosingthatheat. Factors in controlling heat include:

• theorientationofthebuildingrelativetothesun;• externalshadingfromtreesorotherbuildings;• designofthebuilding,especiallyventilationandsealing

atdoorsandwindows;• thecoloursandsurfaceglossofthecladding.

Thefirstthreefactorsareoutsidethescopeofthisbook.Heatisabsorbed into a sheet on one side, and some of that absorbed heat is re-radiated from the other side.

• Light-colouredorshinysurfacesdon’tabsorbmuchheat, and they radiate little.

•Dark-colouredordullsurfacesabsorbalotofheat, andtheyradiatealot.Thisdoesn’tstopyouusingdarkercladdings because you can use reflective foil laminate under the cladding.

5.1 Insulation materialsTypical insulation materials are reflective foil laminates, insulation blankets or batts made from fibreglass, and boards made from polystyrene. Remember that the colour of cladding also has a marked effect.

Foil laminatesFoil laminates reflect heat and can double-up as a vapour barrier to control condensation. Where they are used as a vapour barrier the jointsbetweensuccessivestripsareoverlappedabout100mm,andsealedwithatapeimpervioustomoisture.

blankets and battsBlanketsandbattsminimiseheatconvectionandareavailablewiththe laminate bonded to the fibreglass. They are also effective in reducing noise.

Insulation blankets must be protected from moisture, particularly around the edges of the roof and even more particularly at the bottomendofthecladdingwhererainwaterrun-offcanbeblownbackunderalow-pitchedroof.Iftheblanketoverhangsthebottomsupport,itmayevencomeintocontactwithwaterinthegutter,wheretheinsulationwillabsorbmoistureandremaindampforextended

periods, thus leading to deterioration of the coating on the underside of the roofing and reducing the effectiveness of the insulation.

Polystyrene boardsExpanded and extruded polystyrene is also used for the same purposes as blankets and batts. The boards are more rigid and relativelylesscompressiblewhichdemanddifferentfixingtothatmentioned above. Seek advice from manufacturers of polystyrene insulation.5.2 Insulation thickness (glass wool)Insulationblanketsandbattscancausecladdingtobowoutbetweenthe fasteners. To minimise this problem, the maximum thickness of blankets and batts should be 100mm for pierce-fixed cladding. (Maximumdensity12kg/m3.Formoredenseglasswoolandrockwool,andthickerinsulation,spacersarerecommended.

5.3 Roof safety MeshWhenselectingroofsafetymeshforusewithAluminiumcladdingandor purlins, consideration should be given to:

a)Isolationfromincompatiblematerials

b)Corrosionresistanceofthemeshintheinstalledenvironment.

AsshowninFigure5.1,insulationmaterialswilloftenprovidesufficientisolationofthePermaliteAluminiumsheetingfromsteelsafetymeshandsteelpurlins.Howeverinmanyapplications,wheretheinteriorofthebuildingisacorrosiveenvironment,orifnoinsulationisused,thenappropriatelycertifiedPVCcoatedStainlesssteel mesh or PVC mesh should be used. Where no insulation is used,thenaclosedcellfoamstripshouldalsobeinstalledbetweenthe PVC coated mesh and the sheeting, both at purlins supports and mid span of purlins. For best practice, the foam tape should be 10mm widerthanthepurlintopflange.

5.4 heat control methodsIn roofs, a simple, inexpensive and very effective method is to drape a membrane of reflective foil laminate over the supports before laying the cladding. The laminate can also provide a vapour barrier tominimisecondensation.Ifthemembraneisallowedtodrape50to75mmbetweenthesupportstheairspacebetweenthemembraneandtheroofcladdingwillfurtherimproveheatinsulation

Forinstallationinstructions,refertotheLYSAGHTRoofing&WallingInstallationManual,whichisavailableat:www.lysaght.com.

100m

m

150mm min.

As re

quire

d

As re

quire

d

As re

quire

d

As re

quire

d

150mm min.

150mm min. 150mm min.

100m

m

100m

m

100m

m

50

50

5040

40

40

25

25

20

65

65

11

65

4

ALSPAN WAVELINE V-RIB LT7



150mm min.150mm min.150mm min.

150mm min.

150mm min.150mm min.

150mm min.

150mm min.

APRON FLASHINGS

BARGE FLASHINGS

RIDGE CAPPINGS

12

10

15

Note:AlldepictedflashingreturnsonPermaliteprofilesarebasedona135degbends.


Insulation blanket Roo�ng

Re�ective foil laminate is simple, cheap and very e�ective

Blankets & Re�ective Foil (other insulation types available)

Insulation Insulation blanket Roo�ng

Re�ective foil laminate is simple, cheap and very e�ective

Blankets & Re�ective Foil (other insulation types available)

Insulation

Figure 5.1 Typicalroofinsulationwithfoilorcombinedfoilandblanket insulation

7.0 Accessories

All ProfilesExpansion slot Punching ToolsRA185SlottingTool(Hammer)forLT7orAlspan/V-Rib

RA161SparebladeforRA185

RA165SlottingTool(Standing)forLT7orAlspan/V-Rib

RA166SparebladeforRA165

LT7 ALSPAN V-RIB

WAVELINERA092

RA093

RA154

RA156

BP073

RAWL762

Foam closure strip- external 890mm long

Foam closure strip- internal 890mm long

Foam closure strip- external 854mm long

Foam closure strip- internal 860mm long

Foam closure strip- internal/external 910mm long

Foam closure strip- internal/external 762mm long

25mm

25mm

20mm

25mm

57mm

56mm

NOTE: Accessories which do not carry an RA designation are not held in stock but may be available subject to enquiry. Colours are not necessarily in stock.

Notching tool

Turn-up/turn-downtools

6.0 Anchor points, static lines, guard rails and walkwaysAnysafety/walkwaysystemsfixedtoPermalite® products should be tested to the relevant Australian Standards. For more information contact your Permalite®office.


8.0 Engineering certification

• • • • • • • •


8.0 Combustion certification


Product descriptions Alldescriptions,specifications,illustrations,drawings,data,dimensionsandweightscontainedthiscatalogue,alltechnicalliteratureandwebsitescontaininginformationfromBlueScopeareapproximationsonly. TheyareintendedbyBlueScopetobeageneraldescriptionforinformationandidentificationpurposesanddo not create a sale by description. BlueScope reserves the right at any time to:(a)supplyGoodswithsuchminormodificationsfromitsdrawingsandspecificationsasitseesfit;and(b)alterspecificationsshowninitspromotionalliteraturetoreflectchangesmadeafterthedateofsuchpublication.

disclaimer, warranties and limitation of liability

Termsandconditionsofsaleavailableatwww.permalite.com.au

Excepttotheextenttowhichliabilitymaynotlawfullybeexcludedorlimited,BlueScopeLimitedwillnotbeunderorincuranyliabilitytoyouforanydirectorindirectlossordamage(including,withoutlimitation,consequentiallossordamagesuchaslossofprofitoranticipatedprofit,lossofuse,damagetogoodwillandlossduetodelay)howevercaused(including,withoutlimitation,breachofcontract,negligenceand/orbreachofstatute),whichyoumaysufferorincurinconnectionwiththispublication.

© Copyright BlueScope Limited August 16, 2016

Ph: 1300 850 389 Fax: 1800 850 481 web: www.permalite.com.auBlueScope, PERMALITE®, V-RIB®, LT7®, ALSPAN®,GLACIERWHITE®,GULLGREY®,SLATEGREY®,ENDUROGREEN®,MOONSHADOW® andSAHARA® are registered trademarksofBlueScopeSteelLimited,ABN16000011058.TEK®isaregisteredtrademarkofITWBuildex.EZY-LOKisaregisteredtrademarkofMetalform.Digital16/8/16

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