Refertofigures1,2and3fordetailsofopening preparationandfiredamperinstallationsinwood studandsteelstud1hr.and2hr.ratedwalls.

Seenotes2and3forjointdetail.

Dampershallbesecuredtosleevewith#10sheetmetalscrews6"oncenter,1/4"diameternutsandbolts,welding,3/16"steelpoprivetsorclinching(toggle).

Anglesshallbeaminimumof1-1/2"x1-1/2"x16gaugeandmaybeofa unittypeconstruction.

Fastentosleevewith1/4"diameternutsandbolts,welding8"oncenter,#8sheetmetalscrews8"oncenter,or3/16"steelpoprivets.(SeeNOTE 4forclearanceandoverlap).

NOTES1. Sleeves shall be of the SAMEGAUGE or heavier as the duct towhich it is attached.Gauges shall conform toSMACNAorASHRAEduct standards.Collars shallextendapproximately3"oneithersideofwallorfloortofacilitatethejoining of thecollartotheduct. Incaseswherethewidthoftheretainingangle issuch thatitwouldinhibitjoiningthecollartotheduct,thecollarmayextendapproximately 2"beyondtheedgeoftheangles.SeeNote3.

2. Thefollowingduct-sleeveconnectionsmaybeusedonallsystems. •Insideslip •Angleslip •Plain“S”slip •Double“S”slip •Hemmed“S”slip •Cupslip •Barslip•Driveslip •Alternatebarslip(standingslip) •Pocketlock •Reinforcedbarslip(cleat)

Refertoseparate“BreakawayConnection”sheetforfurtherinformation.

2A.Duct-sleeveconnectionsmaybeoftherigidorfixedtypewhenfiredampersare installedin sleeves that are 16 ga. up to 36"W x 24" H or 14 ga. for size exceeding36"Wx24"H.

3. Whentheductworkterminatesatthedamper,retaininganglesontheoppositeside oftheopeningmaybereversedprovidingthesizeoftheopeningisincreasedby anamountequaltotwicethecombinedthicknessoftheangleandtheheightofthe screworboltheadtomaintainexpansionclearance.(SeeNOTE 4)Inthiscasethe collarattheopenendmaybemadeflushwiththeedgeoftheretainingangle.

4. Clearancebetweenthesleeveandwall/flooropeningshallbeamaximum1/8"per footonheightandwidthofsleevetoamaximumof1-1/2"(e.g.damper47-3/4"x 47-3/4",collar48"x48",opening49-1/2"x49-1/2".Minimumclearanceshallbe 1/4”.Perimeteranglesshalloverlapthewall/floorbyaminimumof1".

5. As with all joints, contractormust seal duct-collar connection in field, after installation.

IMPORTANTDoNotCastDamperInPlaceDoNotFastenRetainingAnglesOrDamperDirectlyToWallCycleDamperAfterInstallationToInsureFreeMovementDoNotInstallDamperOutOfSquareOrOutOfFlatInstallDamperInPlaneOfFireSeparation

INSTALLATION INSTRUCTIONS FOR FIRE DAMPERS

INDRYWALLTYPECONSTRUCTION1HOURAND2HOURRATEDFIRE AND CEILING RADIATION DAMPERS

ULCLASSIFIED(SEECOMPLETEMARKINGONPRODUCT)

WALL

COLLAR(SLEEVE)

DUCT

TYPE-AVERTICALMOUNTING

COLLAR(SLEEVE)

DUCT

TYPE-BVERTICALMOUNTING

COLLAR(SLEEVE)

DUCT

TYPE-CVERTICALMOUNTING

DETAIL OF OPENING PREPARATION AND FIRE DAMPER INSTALLATIONWALL RATING - 1 HR.

FIG. 1

2

NOTE:THE RETAINING ANGLES ONBOTH SIDES OF THE FIREDAMPER MAY BE INVERTEDIN ORDER TOACCOMODATEAREGISTERORGRILLE.SEEFIG.2

2-1/2"STUDORRUNNER

1/2"GYPSUMWALLBOARD

RETAININGANGLE

DAMPERSLEEVE

FIREDAMPER

DUCT

1/2"THICKFILLERPIECES-2-1/2"WIDETOBEINSTALLEDAROUNDENTIREOPENING-SCREWED12"O.C.TOWEBOFRUNNERSANDSTUDS.NOTE:REQUIREDFORWOODSTUDTYPECONSTRUCTIONONLY.

FIG. 2

DETAIL OF OPENING PREPARATION AND FIRE DAMPER INSTALLATIONWALL RATING - 2 HR.

3

NOTE:THE RETAINING ANGLES ONBOTH SIDES OF THE FIREDAMPER MAY BE INVERTEDIN ORDER TOACCOMODATEAREGISTERORGRILLE.

2-1/2"STUDORRUNNER

1/2"GYPSUMWALLBOARD

RETAININGANGLE

DAMPERSLEEVE

FIREDAMPER

DUCT

1/2"THICKFILLERPIECES-2-1/2"WIDETOBEINSTALLEDAROUNDENTIREOPENING-SCREWED12"O.C.TOWEBOFRUNNERSANDSTUDS.NOTE:REQUIREDFORWOODSTUDTYPECONSTRUCTIONONLY.

METAL OR WOOD STUD FRAMING FOR FIRE DAMPERSIN WALLBOARD PARTITIONS

NOTE: GypsumWallboardscrewedtoallstudandrunnerflanges.12”O.C.maximum,surroundingopening

Litho in U.S.A.©2011Metal-Fab,Inc.FormNo.L1746-11/11

88814

MAXIMUM SIZE TABLE

MODELSingle Section Multiple Section

Vertical Horizontal Vertical HorizontalMax. Width Max. Height Max. Width Max. Height Max. Width Max. Height Max. Width Max. Height

MFD 60 60 40 40 120 120 80 40MFD3 48 48 40 40 - - 80 40MDFD 36 36 18 18 - - 36 36MDFD3 36 36 18 18 - - 36 36MFDS 48 48 48 48 - - - -MFDS3 48 48 48 48 - - - -MDFDS 36 36 18 18 - - 36 36MDFDS3 36 36 18 18 - - 36 36MFDUS 48 48 - - - - - -MFDUS3 48 48 - - - - - -

NOTE: Formaximumsinglesectionsizesrefertomaximumsizetable.Foropeningslargerthangivenforsinglesection,multipledampersarerequired.Foropeningslargerthangiveninmultiplesectionsa12”widebrickorreinforcedmullionmustbeprovidedbetweenadjacentassemblies.

FIG. 3FLOORRUNNER

2EACHPANHEADSCREWS

RUNNER90°BEND

16"

A A

16"24"ONCENTER

12"

97-1/2"MAXIMUM

109-1/2"MAXIMUM

2"

2"

CEILINGRUNNER

SCREWS

SECTION"A-A"

2-1/2"STUDS

SCREWS

2-1/2"RUNNER

NOTE:DOUBLESTUDDINGMUSTBEUSEDONTHEVERTICALSIDESOFTHEOPENING.NOTREQUIREDONOPENINGS36"X36"ORSMALLER.