SlOped CeIlINGS - Armstrong World Industries

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SlopedCeilingSTEchnical Guide

Sloped CeilingsTechnical GuideArmstrong Ceiling Panels Acceptable in sloped installationsMineral Fiber Lay-in, Tegular, and Vector Ceiling PanelsFiberglass Lay-in, Tegular, and Vector Ceiling PanelsMetalWorks Tegular and Vector Ceiling PanelsWoodWorks Tegular Ceiling PanelsArmstrong Suspension Systems Acceptable in sloped installationsPrelude XL Accessories:13/16"Suprafine XLSilhouette 1/4" XLSilhouette 1/8" XLInterlude XLWall Moldings:5/16"11/16"2-3/8"BERC2 —Beam End Retaining ClipPMHDC —Maximum Hold Down Clip7808 2" Angle Molding7800 Hemmed AngleGeneralDesigning and installing a sloped suspended ceiling can provide the opportunity to enhance daylighting, conserveenergy, and contribute to LEED EQ Daylighting credits.Generally, a sloped suspended ceiling and its supports and attachments are installed and designed in the samemanner as a flat or level suspended ceiling. Current building code states that suspended ceiling main beams mustbe leveled to within 1/4" in 10'; sloped installations are not addressed. The International Building Code (IBC), as wellas its antecedents, permits alternate designs, materials, and methods of construction so long as any alternate isapproved by the Authority Having Jurisdiction (AHJ).Actual construction of a sloped suspended ceiling may require engineering documents by code officials/authorities having jurisdiction in your area; a strict interpretation of the code may rule out sloped designs.Armstrong Ceilings has a long history of product development and innovation for suspended ceiling systems andcontinues to commit resources to this endeavor. Armstrong Ceilings has thoroughly examined sloped ceilings utilizingceiling panels for Seismic Design Categories C, D, E, F. We have conducted full-scale seismic shake table testing onmultiple sloped ceiling designs at the Structural Engineering Earthquake Simulation Lab located at the State Universityof New York at Buffalo. Armstrong Ceilings can provide documentation of these test results to design professionals,code officials, and building departments on a project specific basis in the form of a Seismic White Paper. For moreinformation on seismic design, please reference our Seismic Design: What You Need to Know Brochure.Since each sloped ceiling design is unique, general detail drawings accompany these guidelines. Project shopdrawings are the responsibility of the contractor. The structural engineer of record is responsible for verifying andapproving the use of Armstrong Ceilings components in these unique installations.4For more information, call 1 877 ARMSTRONG

Sloped CeilingsTechnical GuideSloped Ceiling Installation GuidelinesThe following guidelines are in addition to the requirements set forth in ASTM C636 and ASCE 7.Angle Guidelines Maximum ceiling slope angle shall not exceed 30 . Ceilings with a slope angle 30 require project specific engineering, which is the design team’s responsibility.Maximum Hold Down Clip GuidelinesThe Maximum Hold Down Clip is required for all sloped ceiling applications except MetalWorks Vector ceiling panelswhich have integrated spring clips in the panel.Metalworks Vector Spring ClipSecurity ClipsBorder TabAccess KerfSpring ClipsBorder Tab13/16"Spring KerfReverse TegularReveal Edge5/16"11/16"2-3/8" The use of the Maximum Hold Down Clip will reduce the accessibility of the panel.Shim Guidelines Panels will tend to slide downhill, especially on steeper angles.shim If needed, place 1/8" or 3/32" shims (depending on panel type) between thepanel edge and the web of the cross tee at the lower edge of each panel tocenter the panel in the suspension system opening.Suspension System Guidelines Install main beams parallel (up/down the incline) the slope. O NOT INSTALL MAIN BEAMS PERPENDICULAR TO THE SLOPE AS THIS MAY RESULT IN SUSPENSION DSYSTEM FAILURE. Main beams should be spaced 4'-0" on center, maximum. I f I-beams, joists, or trusses are running up the slope and do not have purlins between them, bridge the beams,joists, or trusses with a material capable of supporting the ceiling system load.For more information, call 1 877 ARMSTRONG5

Sloped CeilingsTechnical GuideHanger Wire Guidelines 12 gauge hanger wire must comply with ASTM C636 requirements.Vertical HangerVertical HangerWire Adjacentto BracingAdjacent Hanger wires should be suspendedWireverticallyand plumb.to Bracing45ºandor the splay wires shall beor I f lateral force 45ºbracingis required in severe seismic areas, it shall remain verticalgreatergreaterinstalled at maximum 45 to the horizontal.Splay WireWireLateral Force Bracing (CompressionSplayPostsand Splay Wires)Main BeamSloped45ºoror45ºgreater Vertical AxisgreaterBracingInstalled VerticallyHorizontal ossAdjacentTeetoBracingBracingto45ºoror Vertical Axis45ºMain BeamgreatergreaterSlopedSide ViewFront al SlopedFrontViewViewFrontVertical HangerWire Adjacentto sHorizontalMainBeamBeamMainSlopedSlopedHorizontal rtical HangerWire Adjacentto BracingBracingInstalledVerticallyHorizontal AxisBracingInstalledVerticallyMain AdjacentWiretoBracingBracingtoCross ticallyVerticallyVertical icallyMain AdjacentWiretoBracingBracingtoCross TeeVertical AxisTop ViewHorizontalAxisAxisHorizontalTop opedSlopedPerimeter Treatment GuidelinesCrossTeeTeeCrossCrossTeeTeeCrossSloped Ceilings Perimeter Solution ded CeilingSlopeUp to 30 Option 1Field Modified 2" Item 7808 WallAngle with positive cross teeattachment at all endsOver 30 6VerticalAxisAxisVerticalNon-Seismic AreasFor more information, call 1 877 ARMSTRONGSeismic Cat. C, D, E, FOption 2Wall shim with 7/8" Item 7800Wall Angle kept at 90 withpositive cross tee attachment atall endsTopViewViewTopOption 3SEISMIC RX solution –Wall shim with 7/8" Item 7800 Wall Angle keptat 90 and BERC2 Clip with positive cross teeattachment on adjacent attached wallsRequires project specific engineering

Sloped CeilingsTechnical GuidePerimeter Treatment GuidelinesPerimeter Solution Options Option 1: Wall angles at the top and bottom of the slope should be re-bent to thecorrect angle by the contractor or at a local sheet metal shop.– 2" wall angle Item 7808 should be used. Note: If 7/8" molding is field bent upwards,the result is no room to mount your cross tees to the angle, unless you back cut theweb and bulb severely, which impacts loading.wall shims Option 2: Wall angles are painted and wall shimmed to achieve the correct angle.– 7/8" wall angle Item 7800 should be used.– The field crafted wall shim must keep the angle 90 to the slope. Option 3 (SEISMIC): Wall angles are painted and wall shimmed toachieve the correct angle.Wall Shim– 7/8" wall angle Item 7800 should be used.BERC2– The field crafted wall shim must keep the angle 90 to theslope in order to use Seismic Rx BERC2 clips.7800 Wall AngleFloating Sloped Ceiling Perimeters Non-Seismic Considerations: Refer to ASTM C636 for standard practice for installation. Seismic Considerations: If sloping a floating cloud, project specific engineering is required.Vector Ceiling Panel Considerations Ultima and Optima Vector ceiling panels in a sloped installation must have the access kerf (A) oriented towardsthe top of the slope.ABLoad ConsiderationsSpecial consideration should be given with lighting in sloped ceilings.For more information, call 1 877 ARMSTRONG7

Sloped CeilingsTechnical GuideQuick Reference Guide for Seismic Sloped CeilingsMineral Fiber and Fiberglass Lay-In, Tegular, andVector Ceiling PanelsPanel TypeWoodworks Tegular PanelsMetalworks Tegular and Vector Ceiling PanelsSeismic CategorySeismic CSeismic D,E, FSeismic CSeismic D,E,FGrid ASTM ClassIntermediate Duty(0 slope 15 )Heavy - Duty(15 slope 30 )Heavy - DutyHeavy - DutyHeavy - DutyNone RequiredRequiredNone RequiredRequiredPerimeter Support Wires8" or Less from WallWall Clearance3/8"3/4"3/8"3/4"Minimum WallMolding Width7/8"2" or7/8" with BERC2 Clip7/8"2" or7/8" with BERC2 ClipRequiredRequiredRequiredRequiredLateral Force Bracing(splay wires/rigid bracing)for Ceiling Areas 1,000 ft2None RequiredRequiredNone RequiredRequiredCompression Posts forCeilng Areas 1,000 ft2None RequiredRequiredNone RequiredRequiredSeismic Separation Jointsfor Ceiling Areas 2,500 ft2None RequiredRequiredNone RequiredRequired3.0 lbs/ft2(Intermediate-Duty Grid)4.0 lbs/ft2 (Heavy-Duty Grid)4.0 lbs/ft24.0 lbs/ft24.0 lbs/ft2See page 9 for layoutconfigurationSee page 10 for layoutconfigurationSee page 9 for layoutconfigurationSee page 10 for layoutconfigurationFastened Perimeter TeeConnectionsMaximum Weight per ft2Maximum Hold Down ClipConfigurationQuick Reference Guide for Non-Seismic Sloped CeilingsNon-Sesimic Sloped Ceiling RequirementsGrid ASTM Class8Intermediate-Duty or Heavy-DutyPerimeter Support Wires 8" or Less from WallNone RequiredWall ClearanceNone RequiredMinimum Wall Molding WidthNone RequiredFastened Perimeter Tee ConnectionsNone RequiredLateral Force Bracing (splay wires/rigid bracing)for Ceiling Areas 1,000 ft2None RequiredCompression Posts for Ceilng Areas 1,000 ft2None RequiredSeismic Separation Joints for Ceiling Areas 2,500 ft2None RequiredMaximum Hold Down Clip ConfigurationNone required.For more information, call 1 877 ARMSTRONG

Sloped CeilingsTechnical GuideSloped Ceiling LayoutsSeismic Categories C, D, E, F Sloped Ceiling Layouts for Mineral Fiber and Fiberglass Lay-In, Tegular,Vector and Concealed Ceiling Panels and Metalworks Tegular and Vector Ceiling PanelsSeismic Category C Sloped Ceiling Layout for Slopes 15 Mains should run parallel to the slope.Category CSlope 15 Floating / Unattached SideCross TeeHigh SlopeMain BeamBERC2 ClipAttached SideFloating / Unattached SidePMHDCLow SlopeAttached SideSeismic Category C Sloped Ceiling Layout for 15 Slope 30 Mains should run parallel to the slope.*Heavy-duty grid must be used.Category C15 Slope 30 Floating / Unattached SideCross TeeHigh SlopeMain BeamBERC2 ClipAttached SideFloating / Unattached SidePMHDCLow SlopeAttached SideFor more information, call 1 877 ARMSTRONG9

Sloped CeilingsTechnical GuideSloped Ceiling LayoutsSeismic Category D, E, F Sloped Ceiling Layout for Slopes 15 Mains should run parallel to the slope.Category D, E, FSlope 15 Floating / Unattached SideCross TeeHigh SlopeMain BeamBERC2 ClipAttached SideFloating / Unattached SidePMHDCLow SlopeAttached SideSeismic Category D, E, F Sloped Ceiling Layout for 15 Slope 30 Mains should run parallel to the slope.Category D, E, F15 Slope 30 Floating / Unattached SideCross TeeHigh SlopeMain BeamBERC2 ClipAttached SideFloating / Unattached SidePMHDCLow SlopeAttached Side10 For more information, call 1 877 ARMSTRONG

Sloped CeilingsTechnical GuideSloped Ceiling LayoutsWoodworks Tegular Seismic Category C, D, E, F Sloped Ceiling Layout for 0 Slope 30 Mains should run parallel to the slope.WoodWorks TegularCategory C, D, E, F0 Slope 30 Floating / Unattached SideCross TeeHigh SlopeMain BeamBERC2 ClipAttached SideFloating / Unattached SidePMHDCLow SlopeAttached SideFor more information, call 1 877 ARMSTRONG11

1 877 ARMSTRONG (276-7876)You Inspire Solutions CenterCustomer Service Representatives7:45 a.m. to 5:00 p.m. ESTMonday through Friday1 800 988 2585email: ings.com/youinspireTechLine – Technical information, detail drawings,CAD design assistance, installation information,other technical services – 8:00 a.m. to 5:30 p.m. EST,Monday through Friday. FAX 1 800 572 8324or email: m/commercialLatest product newsDesign AssistanceCollaborative designDetail drawingsSpecificationsPlanning and budgetingPre-construction AssistanceStandard and custom product informationLayout drawings for standardand premium products Online catalogProject installation recommendationsCAD, Revit , SketchUp files Contractor installation assistanceA Ceiling for Every Space Visual Selection Tool Product literature and samples – express serviceor regular deliveryContacts – reps, where to buy, who will installInspiring Great Spaces is a trademark of AFI Licensing LLC; Lutron is a registered trademark of Lutron Electronics Co., Inc.;All other trademarks used herein are the property of AWI Licensing LLC and/or its affiliates 2017 AWI Licensing LLC Printed in the United States of AmericaSMTechLine / 1 877 ARmSTRONG1 877 276 ng to bring your one-of-a-kind ideas to life

4 1 877 ARMSTRONG Armstrong susPension systems AccePtAble in sloPeD instAllAtions Accessories: WAll molDings: generAl S TECHNI C GUIDE Armstrong ceiling PAnels AccePtAble in sloPeD instAllAtions mineral Fiber lay-in, tegular, and Vector ceiling Pan

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