Grid System

RecycledContent: up to 61%

An economical alternative to curved stud and track construction that is fast and easy to install. Unlimited ceiling curve combinations for endless design options in interior and exterior spaces.

K e y S e l e c t i o n A t t r i b u t e s

• Selected items available in High Recycled Content (HRC): Total Recycled Content 61%, Post-consumer 53%, Pre-consumer 8%

• Non-HRC items have 30% recycled content

• PeakForm® patented profile increases strength and stability for improved performance during installation

• SuperLock™2 main beam clip is engineered for a strong, secure connection and fast accurate alignment confirmed with an audible click; easy to remove and relocate

• ScrewStop™ reverse hem prevents screw spin off on 1-1/2" wide face

• Prenotched at either 8" or 16" on center to simplify fabrication of custom main beam

• RC2 clip is used on main beam at every knockout location to reinforce the desired radius; route hole on clip allows for cross tee placement as required

• Rotary-stitched during manufacture by a patented method for additional torsional strength and extra stability during installation

• Minimum G40 hot dipped galvanized coating, per ASTM C645; provides superior corrosion resistance

• XL2 (staked-on end detail) cross tees provide secure locked connection; fast and easy to install

• 10-year limited warranty

T y p i c a l A p p l i c a t i o n s

• Indoor applications

• Barrel vaults and domes

CURVED DRYWALL

Materials

A. General: ASTM C635 Intermediate-duty main beam classification, ASTM A653 zinc-coated hot dipped galvanized steel. Exposed surfaces chemically cleansed, zinc-coated, and prefinished. Materials conform to the performance standard ASTM C645 (Standard Specification for Rigid Furring Channels for Screw Applications of Gypsum Board).

B. Components:1A. Main Beams: Double-web

construction, profile height 1-11/16" with peaked roof top bulb and 1-1/2" knurIed flange

HD8906FO8 (144", 1-1/2" flange, 51 routes, pre-notched starting 8" from each end and 8" on center for creating curved instalIations)

HD8906F16 (144", 1-1/2" flange, 51 routes, pre-notched starting 4" from one end and 16" on center for creating curved instalIations)

Other_____________________

HD 8901

1/4"

9/16"

1-11/16"

1-1/2"

HD 8901

1/4"

9/16"

1-11/16"

1-1/2"

8" or 16" 144"

2A. Cross Tees: Double-web construction, profile height 1-1/2" with peaked roof top bulb and 1-1/2" knurled flange

XL8965 (72", 2 routes, starting 24" off each end, galvanized) for Type F light fixture compatibility

XL8965HRC (72", 2 routes, starting 24" off each end, galvanized) for Type F light fixture compatibility

XL8947P (50", 8 routes, starting 10" off each end, galvanized) for Type F light fixture compatibility

XL8945P (48", 9 routes, center route and routes starting 10" off each end, galvanized) for Type F light fixture compatibility

XL8945PHRC (48", 9 routes, center route and routes starting 10" off each end, galvanized) for Type F light fixture compatibility

XL7936G90 (36", no routes, galvanized)

XL8925 (26", 2 routes, 12" off each end, galvanized) for Type F light fixture compatibility

XL8926 (24", 3 routes, center route and 12" off each end, galvanized) for Type F light fixture compatibility

XL7918 (14", no routes, galvanized) for Type F light fixture compatibility

Other_____________________

1/4"

3/8"

1-1/2"

1-1/2"

1/4"

3/8"

1-1/2"

1-1/2"

2B. Cross Tees: Double-web construction, profile height 1-11/16" with peaked roof top bulb and prefinished 15/16" flange

XL7341 (48", 3 routes starting 12" from each end, galvanized)

XL8341 (48", center route, galvanized)

Other_____________________

ITEM #XL894515/16" CROSS TEES

ITEM #XL894515/16" CROSS TEES

3. Wall Moldings: Galvanized steel

7838 (120", unhemmed channel molding, nominal 3/4" x 1-9/16", 1-1/4")

Channel Molding

4. Wall Moldings: Galvanized steel

LAM12/12HRC (144", nominal 1-1/4" x 1-1/4" locking angle molding, locking tabs 8" on center, starting 4" from each end)

KAM10 (120" nominal 1-1/4" x 1-1/4" knurled angle molding)

KAM12/KAM12HRC (144", nominal 1-1/4" x 1-1/4" knurled angle molding)

KAM1510 (120", nominal 1-1/2" x 1-1/2" knurled angle molding)

Angle Molding Reverse Molding

(Wall moldings continued on back)

1-1/4",1-1/2"or 2"

1-1/4",1-1/2"or 2"

11/2/987858PRO

90°

12/14/98

1/28/99

15/16"(24mm)

1-9/16"(40mm)

All trademarks used herein are the property of AWI Licensing Company and /or its affiliates

© 2011 AWI Licensing Company • Printed in the United States of America

Grid System

Creating curved framing for drywall is easy and offers unlimited possibilities.

• Custom radii to suit any design installation • You control the curve • Not limited to a preselected or predetermined curved radius • Full range of clips and accessories make installation easier than bending

stud and track

Radius will determine on center spacing of cuts.

RC2 Clip must be installed on faceted main beams when used to frame a flat ceiling.Note: Place RC2 clip on the side of the web where the rotary stitching forms a cavity. This allows the clip to be placed flush with web.Note: RC2 clip must be installed at every knockout location on main beam.

RC2 Clip

C u r v i n g M a i n B e a m s

Contractors’ efficiency and understanding of the suspended grid system construction provides performance benefits and cost savings.

• An unlimited range of vaults and valleys can be constructed using faceted main beams

• Single and multiple curved ceilings can be framed quickly and easily

Working with Vaults

1. Hanger wires must be minimum 12 gauge and spaced along the main beams not more than four feet on center for gypsum board construction and not more than three feet on center for plaster work (spaced as required to support load).

2. For vaults, space the main beams four feet on center for gypsum board construction and three feet on center for plaster. Angle or channel molding is used to frame the ends of the structure.

3. Thickness of the sheeting material is determined by its plasticity.

4. Add vertical braces as required to stabilize the frame.

5. See Commercial Ceilings Solutions Guide (CS-3479) for additional information.

MaterialHot dipped galvanized steel

Surface FinishUnpainted steel

Cross Tee/Main Beam InterfaceOverride

End DetailMain Beam: Staked-on clip Cross Tee: Staked-on clip

Duty ClassificationIntermediate-duty

P h y s i c a l D a t a

Main Beam Load Test DataHAngER SPACIng

(Lbs./LF. Simple Span)**

MAInBEAMS

LEngTH

WEBHEIgHT

ASTM CLASS

L/240 L/360

2' 3' 4' 2' 3' 4'HD8906F08 144" 1-11/16" Intermediate-duty 18.4 12.3

HD8906F16 144" 1-11/16" Intermediate-duty 18.4 12.3

Note: All load test data based on flat installation per ASTM C635

Cross Tee Load Test DataHAngER SPACIng

(Lbs./LF. Simple Span)**

CROSSTEE

LEngTH

WEBHEIgHT

L/240 L/360

2' 3' 4' 50’ 72' 2' 3' 4' 50’ 72'

XL7918 14" 1-1/2" 107.0 71.5

XL8926 24" 1-1/2" 158.0 129.0

XL8925 26" 1-1/2" 117.0 98.0

XL7936G90 36" 1-1/2" 50.0 33.3XL7341 48" 1-11/16" 24.8 16.59XL8341 48" 1-1/2" 24.8 16.59 XL8945P (HRC) 48" 22.5 15.0XL8947P 50" 19.5 13.0 XL8965 (HRC) 72" 1-1/2" 6.4 4.27

Seismic PerformanceMAIn BEAMS

MInIMUM LBS. TO PULL OUT COMPRESSIOn/TEnSIOn

HD8901 348.0HD8906 374.0

CROSS TEESMInIMUM LBS. TO PULL OUT COMPRESSIOn/TEnSIOn

XL7918, XL8926, XL8925, XL7936G90, XL7341, XL8341, XL8945P (HRC), XL8947P, XL8965 (HRC)

377.0

ICC ReportsFor areas under ICC jurisdiction, see ICC evaluation report number 1289 for allowable values and/or conditions of use concerning the suspension system components listed on this page. The report is subject to re-examination, revisions, and possible cancellation.

CURVED DRYWALL

(Wall moldings continued)

4. Wall Moldings: Galvanized steel

KAM1512 (144", nominal 1-1/2" x 1-1/2" knurled angle molding)

KAM20120 (120", nominal 2" x 2" knurled angle molding)

KAM20125 (144", nominal 2" x 2" knurled angle molding)

HD7859 (120", hemmed angle molding, nominal 1-1/4" x 1-1/4")

7858 (144", hemmed reverse angle molding, nominal 1-9/16" x 15/16")

Other_______________________

1-1/4",1-1/2"or 2"

1-1/4",1-1/2"or 2"

11/2/987858PRO

90°

12/14/98

1/28/99

15/16"(24mm)

1-9/16"(40mm)

Angle Molding Reverse Molding

5. Radius Clip (RC2): Used for drywall applications which form curved installations; attaches to the cavity side of the web of the main beam with four 7/16" pan head screws; install at all knockout locations.

Accessories: (see Drywall Accessories Submittal Sheet, CS-3082).

TechLineSM / 1 877 ARmSTRONG 1 877 276 7876

armstrong.com/drywallgridCS-3545-911