Donn Ceil

15ISSUE DATE: JUNE 2009

Design

Accoustic PerformAnceCeilingboardsareperforatedanddesignedtoper-form sound absorption when used in conjunctionwith airspace behind the ceiling. Increased levelsofsoundabsorptioncanbeachievedby includinginsulationoverthebackoftheceiling.

Wheresoundinsulationroomtoroomisrequired,high sound attenuation can be achieved by theinclusion of 100mm fibreglass insulation over theback of the ceiling. Alternatively, other designconsiderations shouldbeadopted suchasextend-ing adjoining partitions into the plenum void orinstallingaplenumbarrier.

sound insulAtion

NOISESOURCEFROMABOVESLAB

NOISESOURCEFROMCEILINGVOID

NOISESOURCEFROMAJOININGROOM


descriPtionGyprexceilingtilesaremanufacturedfromRhinoBoardwithatoughwashablevinylfinishbondedtotheboardandareusedina“lay-in”exposedteesuspendedceilingsystem.

Gyprexceilingtilesarenon-combustibleaccordingtotheSABS0400/1990PARTT57.2(NationalBuildingRegulations-noncombus-tiblebuildingmaterial).

APPlicAtions• Shoppingcentres• Offices• Hospitals

sPecificAtionInstallGyprexceilingtilesontoaDonn®T37VorT38Vexposedgridsystem.

tecHnicAl dAtADimensionaltolerances:+0-5mmPackaging: Packedineightsface-to-face.Panelsize: 1195mmx595mm*LayIn 1495mmx495mmLayIn 595mmx595mm*LayIn(*specialorder)RhinoBoardFireIndex: Class4(SABSReportno653/82916/94C)R-Value: 0.075m2°c/wSpreadofflame: Class1Thermalconductivity: (K)0.17W/mCThickness: 12.5mmWeight: 10kg/m2

Note:• Holddownclips(alt.wedges)shallbeusedtorestraininfillboards fromliftingattheedges.• Toavoiddamage,tilestobeliftedoff,andnotslidovereach other.

PorcelAin WHitefissured

Gyprex Ceiling Tiles


OWA Futura Premium

descriPtionCeilingsshouldlookgood-andatthesametime,theymustfulfilthemanyessentialprojectrequirements.Fireprotectionandsoundcon-trolshouldbeincorporatedinasimpleinstallation.TheOWAobjec-tiveistofulfilthemanyneedsofindividualprojectswhilstsustainingtheindividualdesigncriteria.

APPlicAtions• Offices• Hotels• Shoppingcentres• Receptionareas

sPecificAtionOWAPremiumceilingtilesareinstalledontoaDonn®T37VorT38Vexposedgridsystem.

tecHnicAl dAtANRC: 0.75Panelsize: 1195mmx595mmLay-in 595mmx595mmLay-inRelativeHumidity: 90%Thickness: 15mmWeight: (15mm)approx.5.0kg/m2

(20mm)approx.5.0kg/m2

Note:• Holddownclips(alt.wedges)shallbeusedtorestraininfillboards fromliftingattheedges.• Toavoiddamage,tilestobeliftedoff,andnotslidovereachother.


OWA Constellation Premium

descriPtionCeilingsshouldlookgood-andatthesametime,theymustfulfilthemanyessentialprojectrequirements.Fireprotectionandsoundcon-trolshouldbeincorporatedinasimpleinstallation.TheOWAobjec-tiveistofulfilthemanyneedsofindividualprojectswhilstsustainingtheindividualdesigncriteria.

APPlicAtions• Offices• Hotels• Shoppingcentres• Receptionareas

sPecificAtionOWAPremiumceilingtilesareinstalledontoaDonn®T37VorT38Vexposedgridsystem.

tecHnicAl dAtANRC: 0.65Panelsize: 1195mmx595mmLay-in 595mmx595mmLay-inRelativeHumidity: 90%Thickness: 15mmWeight: (15mm)approx.5.0kg/m2

(20mm)approx.5.0kg/m2

Note:• Holddownclips(alt.wedges)shallbeusedtorestraininfillboards fromliftingattheedges.• Toavoiddamage,tilestobeliftedoff,andnotslidovereachother.


SoundLite® Coral Fibreglass

descriPtionSoundliteismanufacturedfromnon-combustibleglassfibresandbinderswhicharelight-weightandresilient.

Soundlitemaybeusedinareasofhighrelativehumidityandhasexceptionalsoundabsorption.Thisproductalsofeatureshighther-malresistance,eliminatingtheneedforadditionalceilinginsulation.

APPlicAtions• Offices• Highhumidityareas

sPecificAtionFixSoundliteCoralFibreglassceilingtilesontoaDonn®T37VorT38Vexposedgridsystem.

tecHnicAl dAtANRC: 0.75(40mmthick) 0.65(25mmthick)Panelsize: 595mmx595mm*LayIn(*specialorder) 1195mmx595mmLayInRelativeHumidity: 95%

Note:• Holddownclips(alt.wedges)shallbeusedtorestraininfillboards fromliftingattheedges.• Toavoiddamage,tilestobeliftedoffandnotslidovereachother.


Gyptone BIG Quattro 41

descriPtionGyptoneacousticboardshavebeendesignedtobringqualityandafeelingofspacetooffices,shops,malls,restaurantsandotherbuild-ingswhereacousticambienceisimportant.

GyptoneboardshandleandcutaseasilyasregularRhinoBoard,thesmooth,durablesurfaceiseasytomaintainandcanberedecoratedoverandoveragainwithoutaffectingacousticperformance,providedthepaintisnotappliedtotheacousticliner.

sPecificAtionFixGyptoneBIGQuattro41ceilingboardsontoaDonn®T37Kgrid.

tecHnicAl dAtABoardsize: 2400mmx1200mmHolesize: 12mmx12mmPerforationarea: 16%LightReflectance: 70%withwhiteemulsionpaintfinishNRC: 0.55-0.7dependantonplenumdepthRelativeHumidity: 70%CAC: 39dbThickness: 12.5mmWeight: 7.8kg/m2

surfAceGyptoneBIGissuppliedunpainted.Paintingisdoneafterinstallation.Theboardsarepaintedusingaroller.Theboardsmustnotbespraypainted,asthisconsiderablyreducestheirsoundabsorptioncapacity.


Gyptone Bend Line 7

descriPtionTheproduct range forGyptoneBend comprises Line7CurveBoard-withslottedperforationsandtaperedlongedges.GyptoneBendisonly6.5mmthickandallowsthecreationofcurved/archedshapesinthesuspendedceiling.

Inaddition,thelargeformatmakesitpossibletocreatelarge,unbro-kenceilingsurfaceswithoutvisiblejoinsorgrids.

AcousticsSound absorption varies with design height, bending radius andshape, and any mineral wool backing. It is not possible to specifypreciseabsorptionvalues, since it is impossibletocarryoutrelevantmeasurements.Soundabsorptiondataforsimilarflatboardswithequivalentpatternsshouldbeusedforguidance.

sPecificAtionFixGyptoneBendLine7ceilingboardsontoaDonn®T37Kgrid.

tecHnicAl dAtABoardsize: 900mmx2400mmHolesize: 6mmx80mmPerforationarea: 14%LightReflectance: 70%withwhiteemulsionpaintfinishRelativeHumidity: 70%Thickness: 6.5mmWeight: 5kg/m2

surfAceGyptoneBendissuppliedunpainted.Paintingisdoneafterinstallation.The boards are painted using a roller. The boards must not be spraypainted,asitconsiderablyreducestheirsoundabsorbtioncapacity.


Gyptone BIG Line 6

descriPtionGyptoneacousticboardshavebeendesignedtobringqualityandafeelingofspacetooffices,shops,malls,restaurantsandotherbuild-ingswhereacousticambienceisimportant.

GyptoneboardshandleandcutaseasilyasregularRhinoBoard,thesmooth,durablesurfaceiseasytomaintainandcanberedecoratedoverandoveragainwithoutaffectingacousticperformance.

sPecificAtionFixGyptoneBIGLine6ceilingboardsontoaDonn®T37Kgrid.

tecHnicAl dAtABoardsize: 1200mmx2400mmHolesize: 6mmx80mmPerforationarea: 13%LightReflectance: 70%withwhiteemulsionpaintfinishNRC: 0.55-0.7dependantonplenumdepthRelativeHumidity: 70%Thickness: 12.5mmWeight: 7.8kg/m2

NB.Wallanglesarenotload-bearing.

surfAceGyptoneBIGissuppliedunpainted.Paintingisdoneafterinstallation.Theboardsarepaintedusingaroller.Theboardsmustnotbespraypainted,asthisconsiderablyreducestheirsoundabsorptioncapacity.


Sound Absorption Data

GyPtone boArds WitH Plenum of 400mm

BendLine7 BIGQuattro41

BIGLine6


Suspended Ceiling Grid

The standard face widths of the grid system are 15mm, 25mm and35mm. Each width has its own preferred application, but no realconstruction criteria exists for their respective usage i.e. a 15.0mmgridsystemwillacceptanylaytilesizeanda25and35mmgridwilldothesame.However,somerevealededgedtileswillonlyfitintothenarrowgrid(15mm). We therefore recommend, that when specifying revealededgedtiles,thatyoucheckthecorrectgridfortheparticulartile.

Thewidegrid(35mm)isalsorecommendedinareaswhereadditionalsupportfortheceilingtileisrequirede.g.underoutsideoverhangs,orwherethenatureofthetilemakesaccuratesizingofthetiledif-ficulttocontrol.

Themanufacturerscanbecontactedforadetailedinstallationprocessofsuspendedceilinggridsystems.


System Components

AngleCleat:forfixingofteestowall.

T15CrossTee:isthesecondarycrossbeamofamechanicalceil-ingsuspensionsystem.

Holddownclip:mechanicalfastenerthatsnapsoverthebulbofagridsystemtoholdceilingpanelsinplace.

T15MainTee:istheprimarybeamofamechanicalceilingsus-pensionsystem.

Holddownwedge:fastenerforholdingtilesinplace

T25CrossTee:isthesecondarycrossbeamofamechanicalceil-ingsuspensionsystem.(usedwithT38grid)

20mmx20mmgalvanizedsteelangleusedasahanger

T32CrossTee:isthesecond-arycrossbeamofamechanicalceilingsuspensionsystem.(usedwithT37

25mmx25mmgalvanizedsteelangleusedasahanger

T37mainTee:istheprimarybeamofamechanicalceilingsus-pensionsystem.

25mmx51mmgalvanizedsteelwallangleusedasahanger

T38CrossTee:isthesecondarycrossbeamofamechanicalceil-ingsuspensionsystem.

38mmx25mmgalvanizedsteelwallangleusedasahanger

T38MainTee:istheprimarybeamofamechanicalceilingsus-pensionsystem.

Plastertrim:usedinflushplas-teredceilingsasawallangleortocreateashadow-lineeffect

Universalclip:universalfastenerusedontilesofanythickness

BurgessChannel:suspensionChannelusedtoformsub-grids

LUS25:wallangle

SM25:25mmwallangle


General Information

mAximum sPAns of susPension on mAin teeManufacturersteeshallsuspendtomaximumof1200mm.Forspecializedspanscontactthemanufacturerfordetails.

Junction betWeen Perimeter trims And ceilinG GridGreaterthan400mmanadditionalsuspensionpointshouldbeaddedin.

Perimeter trimsPerimetertrims-standardsuspendedceilings:PerimetertrimsforsuspendedceilingscanbetheL-shapeortheshadowlinetype(stepped).

Perimetertrims-Flushplastersuspendedceilingsgalvanizedangleorashadowlinetypeisusedtocreateashadowlinewhichhidesbuildingimperfections.

Theperimetertrimsaremeasuredasanindependentiteminbillsofquantity,asnotwoareaswillnecessarilyyieldthesameusageoftrims.

tee systemsRecommendationsfortheSuspensionofTeeSystems• Subjecttoloadingdetail,suspensionshouldnotexceed1200mm centres.• Thesuspensionmustnotbeoutofplumb(vertical)morethan 25mmforeach150mmofplenumdepthandinnocaseshould exceed500mmtoa3000mmdepth.• Wheneveraboveisexceededand/orwhenthehanger suspensionismorethan2000mmlong,thenasubgridis recommended.Shouldsuspensionbevertical,thena4000mm dropwouldbeacceptableusingahangarstrap.• Innocaseshouldsuspensionbefromotherservicesintheceiling void.• Ahangersuspensionpointwithin400mmfromthewallangleor shadowmouldingmustbeinstalledonmaintees&crosstees.• Twosteelpoprivetswithashearstrength3timesthatofthe maximumallowedceilingloadistobeused.• Whensecuringwiretotee,itshouldbewoundtightlyaround itselfatleast3times.• Shouldtheceilingmassexceed20kg/m2,asubgridisrequiredand aconsultingengineershouldrecommendsuitablesuspension.

HangerlimitationsWirehangers: 2500mmHangerstrap: 4200mm25x25mmanglehangers: 3600mm


Specifications of Grid Systems

1. t38 system (1200x600)InstallT38 (3600mm)mainteesandT38(1200mm)(600mm)cross teeswithcappingofaluminiumpre-paintedlowsatinsheen.Themainteesshallbeinstalledat1200mmcentres.

2. t37 systemInstallT37V(3600mm)mainteesandT32V(1200mm)(600mm)crossteeswithcappingofaluminiumpre-paintedlowsatinsheen.Themainteesshallbeinstalledat1200mmcentres.

3. Grid oPtions

GyPtone instAllAtion And JointinG

screw fixingGyptone BIG boards with tapered long edges are attached to T37KGridusing25mmstreakerscrews.Theboardshavejointsfilledandthesurfacepaintedafterfixingandisnon-removable.Aminimumheightof100mmbetweenslabandgridisrecommendedforbettersoundabsorption.

Jointing:Tape and joint according to data sheet for Hand JointingApplication.

fixingGyptone Line 7 Curve Board is fixed to pre-curved sections, usingscrews,andtheboardscannotberemoved.

finishing:GyptoneBend is suppliedunfinished. Painting is carriedout in-situafterjointfilling.TheboardsarepaintedusingaMohairroller;theymustnotbe spray-painted, since this impairs the soundabsorption.Care must be taken such that paint is not applied to the acousticliner.

T37GRIDSYSTEMflushplastered

T37GRIDSYSTEMlay-in

T38GRIDSYSTEMlay-ingrid

T38GRIDSYSTEMshadowline


dynAmic loAds on ceilinGs:Care shouldbe taken toensure that the fixingused for suspensionpoints (especially into concrete) should be able to support a safetyfactorofthreetimesthedesignloadoftheceiling.Suspendedceil-ingsarenotdesignedtotaketheweightsofservicespersonnelwalk-ingaroundonitstopsurface,andifthisisarequirement,aseparatecatwalksystemmustbeprovided.

Note: The tee loading results shown in thisdocument ismaximumloads allowable to remain within deflection of 1/360 of the span.For further details and confirmation of technical details, consultwithyournearestGyprocofficeorcallTechnicalSolutionsCentreon0126572800.

Ceiling Grid Tee Loading


Ceiling Grid Tee Loading

1. MAXIMUM LOAdING (KGS/M2) UNdER COMMON GRId CONFIGURATION

NOTE: Theteeloadingresultsshowninthisdocumentaremaximumloadsallowabletoremainwithindeflectionof1/360ofthespan.ForfurtherdetailsandconfirmationoftechnicaldetailscontactyournearestBPBGypsumOffice.

LightFitting 600x1200 600x1200 300x1200 300x1200 600x1500 500x1500DXT38MainTee 15kg/m2 14kg/m2 15kg/m2 14kg/m2 12kg/m2 14kg/m2

DXT15MainTee 15kg/m2 - - - - -

NOTE: T38andT15crossteesprependiculartomaintees.odotsindicatehangerlocationat1200mmcentresalongmaintee.

CROSS TEE

MAIN TEELIGHT FITTING

1200 1200 1200 1200 1500 1500

CROSS TEES

1200 1200 1200

MAIN TEES

1500 1500

LIGHT FITTING

1500

600CROSSTEES

1200

MAIN TEES

1200CROSSTEES

600CROSSTEES

600CROSS

TEE

1200 CROSS TEE

1200600

1200CROSSTEES

MAIN TEES

1200

1200 CROSSTEES

1200 600

600CROSSTEES

1500CROSSTEES

MAIN TEES

1500 1500 500

1500 CROSS TEES MAIN TEES

500CROSSTEES

LightFitting 600x1200 600x600 600x1200 600x1200 500x1500 500x1500DXT38MainTee 14kg/m2 17kg/m2 13kg/m2 14kg/m2 14kg/m2 14kg/m2

DXT15MainTee 14kg/m2 17kg/m2 - - - -

NOTE: T38andT15crossteesprependiculartomainteesandcrosstees.odotsindicatehangerlocationat1200mmcentresalongmaintee.(Extrasupporton1500crossteesasshown).

CROSS TEE

MAIN TEELIGHT FITTING

1200 1200 1200 1200 1500 1500

CROSS TEES

1200 1200 1200

MAIN TEES

1500 1500

LIGHT FITTING

1500

600CROSSTEES

1200

MAIN TEES

1200CROSSTEES

600CROSSTEES

600CROSS

TEE

1200 CROSS TEE

1200600

1200CROSSTEES

MAIN TEES

1200

1200 CROSSTEES

1200 600

600CROSSTEES

1500CROSSTEES

MAIN TEES

1500 1500 500

1500 CROSS TEES MAIN TEES

500CROSSTEES

1.1. LIGhT FITTING SUPPORT - MAIN TEE TO MAIN TEE

1.2. LIGhT FITTING SUPPORT - CROSS TEE TO CROSS TEE


Suspension Components

Suspension components will consist of a number of different itemswhichwhencombined/joinedorusedinconjunctionwitheachotherwillcreateaneffectivesuspensionsystem.Theweakestcomponent/jointinthesystemwilldeterminethebreakingpointofthesuspen-sionsystem.

Oftenasubstituteproductwillbeusedtosuspendaceilinggridsys-tem.Theonusisonthespecifiertoensurethatcomponents,whichcomplywithminimumstandards,areused.

Typicalstandard/approvedcomponentsare:• Pre-stretchedgalvanizedhangerwire2.5mm• 19mmSteelhangerstrap• Galvanizedangle20x20mm• Galvanizedangle25x25mm• Galvanizedangle50x25mm

NB.Subjecttoloadingdetailsuspensionspacingshouldnotnormallyexceed1200mmcentres(T80Longspan=2400mmsuspensionspacing-max2700mmwithlighttiles).

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Installation of grid shall be in accordance with the manufacturer'sspecification. Holddownclipsmustbeusedtoholdthetilesfirmlyinposition.

1.Maintees@600mmcentre Multiplytotalceilingareax0,232=numberofmaintees.2.Crosstees1200mmlongat600mmcentres.Multiplytotalceiling areax1,383=numberofcrosstees.3.Wallangles=totallengthofwalldividedby3.6=numberofwall angles.4.Suspensionhangersatmaximum1200mmcentres.Totalceiling areadividedby1.6=numberofhangers.5.Gyprextiles1195mmx595mm:Totalceilingareadividedby0.7= numberoftiles.

1.Maintees3600mmlongat1200mmcentres. Multiplytotalceilingareax0,232=numberofmaintees.2.Crosstees1200mmlongat600mmcentres.Multiplytotalceiling areax1,383=numberofcrosstees.3.600mmCrossteeswillequalthesameamountof1200mm Crosstees.4.Wallangles=totallengthofwalldividedby3.6=numberofwall angles.5.Suspensionhangersatmaximum1200mmcentres.Totalceiling areadividedby1.6=numberofhangers.6.Gyprextiles1195mmx595mm:Totalceilingareadividedby0.7= numberoftiles.

ISSUE DATE: JUNE 2009

Formula to Calculate Materials


Formula to Calculate Materials

1.Maintees3600mmlongat1500mmcentres.Multiplytotalceiling areax0,191=numberofmaintees.2.Crosstees1500mmlongat500mmcentres.Multiplytotalceiling areax1,334=numberofcrosstees.3.Wallangles=totallengthofwalldividedby3.6=numberofwall angles.4.Suspensionhangersatmaximum1200mmcentres.Totalceiling areadividedby1.6=numberofhangers.5.Gyprextiles1495mmx495mm:Totalceilingareadividedby0.73= numberoftiles.

nb: Above calculation will provide approximate quantities and does not allow for wastage.

ExposedTeeSystems1.T38DXmainteeswithT38crosstees2.T38DXmainteeswithT25crosstees3.T37DVmainteeswithT32crosstees

tools And mAteriAls reQuired:

• Screwstoattachwirehangers• 18-gaugesteelwire(residentialinstallation)or 12-gaugesteelwire(commercialinstallation)• Screwstoattachwallangles• Metalsnipstocutteesandwallangles• Chalkline• Level• Pliers• Utilityknife• Safetyglasses


Planning and Installation Guide

terms you sHould KnoW

Wall Angle or Wall molding: Refers to the L-shaped metal stripsthatprovideacontinuousfinishededgearoundtheperimeteroftheceiling,wheretheceilingmeetsthewall.

main tees: The metal, primary support member for the ceiling'sweightthatrunfromwalltowallbetweenwallangle,inonedirec-tion. They come in 3600mm lengths, and are hung by hanger wirefromjoistsorotheroverheadsupports.

cross tees: Snap into main tees as secondary support members tolockindividualceilingpanelsinplace.Theycomeintwolengths.

1200 cross tees:Usedfor600x1200-gridpatternsand600x600gridpatterns

600 cross tees:Usedfor600x600gridpatterns

typical installation: this diagram showsa 600 x 1200 ceiling grid layout

before you beGin:Careful planning helps you to estimate accurately the materialsrequired, and to eliminate time-consuming errors. Here's an easyguidetofollowinplanninganyspaceforasuspendedceilinginstallation.

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Step 6: Mitre both internal and external corners.

Step 4: Connect/join level markers at corners/wallsusing a chalk line.

Step 2: Choose a ceiling height. Leave at least a100mm minimum clearance below the lowest airduct, pipe or beam to allow for installing ceilingtiles. Then measure and mark the desired heightat each room corner.

Step 1: Tie beams at a maximum of 1200mmcentres. Scaffolding erected.

Step 3: Using a water level or laser level transferthe height mark (from previous step) to allcorners/walls.

Step 5: Install wall angles. Place the top of thewall angle along the chalk line and screw it intothe wall. Space fasteners every 600mmcentres or closer.


Installing your Suspended Ceiling

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Step 11: Hanger strap cut at fish line level. Step 12: Using two steel pop rivets, fix the hangerstrap to the web of the tee.

Step 13: Using one wafer Tek screw, fix the hangerstrap to the web of the tee.

Step 14: If using wire as suspension, ensure thewire is looped and wound three times arounditself.

Step 9: Install the rest of the hanger straps fromsetting line at 1200 centres.

Step 10: Cut hanger strap to the same levelof the fish line or laser level.


Step 7: Mark position off main tees. Stretch astring across the room at ceiling height to locateeach main tee. Mark main tees every 1200 centres.Set out the ceiling grid ensuring equal cuts allround. Ensure setting out lines are perpendicularto each other.

Step 8: Install first row of hanger straps/wire orangle along the setting out line.

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Step 15: Install first row of perimeter cross tees.Mark cross tees. Stretch a string perpendicular tothe main tee strings to mark the first row of crosstees only. Main tees are equipped with pre-punched slots for aligning the remaining crosstees.

Step 16: Install full length cross tees.

Step 19: Install angle cleats to ensure straightgrid and stability.

Step 20: Lay-in tiles.

Step 17: Install perimeter cross tees to oppositewall.

Step 18: A fully installed grid.



Glossary

susPension system terms

bulb - The upper ridge of the main runner orcross tee with a rectangular, triangular or roundconfiguration.Addsstructural loadstrengthtothecomponent.

cap-TherolledcoveringontheflangeofaT-Bar.T-Barscomewithanaluminiumorsteelcapandinmanycolors.

ceiling suspension system - A system of metalmembers,designedtosupportasuspendedceiling,typicallyanacousticalceiling.Alsomaybedesignedtoaccommodatelightingfixturesorairdiffusers.

clips - Several clip designs are available to suitapplicationssuchasfireresistance,windupliftandimpact. Fire-resistance rated designs have exactrequirements,includingthemandatoryuseofholddown clips for acoustical panels or tiles weighinglessthan4.9kg/m21.0poundpersquarefoot.Forroomswithsignificantairpressuredifferentialfromadjacent spaces, retention clips may be necessaryto retain panels in place. Maintaining air pressurevalues may also require perimeter panel seals,typically a closed cell foam gasket with adhesiveononeside.

cross runner, cross tee -Thecrossrunneristhesecondary or cross beams of a mechanical ceilingsuspension system, usually supporting only theacoustical tile. The cross tee is inserted into themainrunnertoformdifferentmodulesizes.Insomesuspensionsystems,however,thecrossrunnersalsoprovide support for lighting fixtures, air diffusersandothercrossrunners.

deflection -Bendingordeviation froma straightlineorcourse.Usedhereasthestandardbywhichallowable load for suspension system componentsismeasured.

electrogalvanized-Aplatingprocessthatdepositsa coating of zinc on a cold rolled steel substrate.Thicknessorweightofcoatingcanbevariedandistypicallycategorizedasheavy-electrothroughstan-dard-electro or "flash" electrogalvanized. Processprovidingrustresistanceformetal.

exposed Grid system - Structural suspensionsystem for lay-in ceiling panels. Factory-paintedsupportingmembersareexposedtoview.Exposedteesurfacesmaybecontinuousorhaveanintegralreveal. Reveals are typically formed as channelor rail profiles extending down from the tee leg.Bolt-slot type reveal designs can accommodatepartitionattachment.Thechoicemayberestrictedby appropriate tee width for panel selected andlimitations on available panel edge details for thechosengridprofile.

fixture Weight - Individualweightofmechanicalservicessupportedbyceilinggridmembers.

flange-Horizontalsurfaceonthefaceofthetee,visiblefrombelowtheceiling.Thepartofthegridtowhichthecolorcapisapplied.

Galvanized - A generic term used to describe asheetorcoilofsteelcoatedwithzincappliedinanelectrogalvanizingordippingprocess.

Gauge-Thicknessofthesteelusedtomakeagridmember.Expressedinmillimetres.

Grid -Structuralsystemofmainbeams,crosstees,and associated hardware which hangs from thedeckaboveandsupportslay-in,concealedorsurfaceattachedceilingpanels.

Hanger Wires - Wire employed to suspend theacoustical ceiling from the existing structure. Thestandardmaterialisgalvanized,softannealedsteelwire.Seismicdesignsorexteriorinstallationssubjecttowindupliftmayrequiresupplementalbracingorsubstantialhangerdevicessuchasmetalstraps,rodsorstructuralangles.

Hold down clip -Mechanical fastener that snapsoverthebulbofagridsystemtoholdceilingpanelsinplace.

Hook tee - Cross tee with an end tab that hooksthroughtheroutholeandrestsontheverticalwebofthemainrunner.

Hot dipped Galvanized -Processtocoatsteel tooffer environmental resistance to corrosion. Coldrolled steel is submerged (dipped) into a moltenzincbath.Aheavycoatingofzincisappliedtothesteelsubstrate.


Glossary

l/360, span/360 - The distance between supportpoints of a suspension system member divided by360.Theresultofthismathematicalequationisthemaximumamountofdeflectionthatisallowed.

load - Amount of force (weight) that is appliedtoalinealmetreofanyloadbearingmemberofaceilingsystem.

main beam, main runner, main tee-Primaryormainbeamsofthetypeofceilingsuspensionsystemin which the structural members are mechanicallylockedtogether.Providedirectsupportforcrossteesandmaysupportlightingfixturesandairdiffusers,aswellas theacoustical tile. Supportedbyhangerwiresattacheddirectlytotheexistingstructure;orinstalled perpendicular to carrying channels andsupportedbyspeciallydesignedsheetmetalorwireclipsattachedtothecarryingchannels.Stiffening Brace - Used to prevent uplift of gridcausedbywindpressureinexteriorapplications.

suspension system-Ametalgridsuspendedfromhanger rods or wires, consisting of main beamsand cross tees, clips, splines and other hardwarewhichsupportslay-inacousticalpanelsortiles.Thecompleted ceiling forms a barrier to sound, heatand fire. It also absorbs in-room sound and hidesductworkandwiringintheplenum.

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