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ClarkDietrich Sound Clip™ (CDSC)

Sound isolation and dampening clip

Used to fasten gypsum wallboard in various wall and floor-ceiling applications, while simultaneously providing acoustical separation.

The ClarkDietrich Sound Clip™ (CDSC) is used in conjunction with 18mil (25ga) 7/8" deep drywall furring channel. It is used to fasten gypsum wallboard in various wall and floor-ceiling applications, while simultaneously providing acoustical separation. This significantly reduces the amount of airborne sound filtering from room to room. The ClarkDietrich Sound Clip increases the STC ratings in most assemblies while reducing sound transfer.

  • Ideal for use in multi-family dwelling, hotels, theaters and hospitals
  • Used in conjunction with 7/8" 25 ga Furring Channel with a total standoff from stud of 1-5/8"
  • UL fire rated for most common assemblies
  • Complies to UL 263 test standards. See full list of UL® design assemblies in UL R19331
  • Maximum spacing 48" o.c. (laterally) x 24"o.c. (vertically)
  • Maximum design load is 36 lbs.
  • SOUND TESTING FOR TYPE X & TYPE C BOARDS

Design Loads

  • Maximum spacing 48" o.c. (laterally) x 24"o.c. (vertically)
  • Maximum design load is 36 lbs

Sound & UL Design

Complies to UL 263 test standards. See full list of UL® design assemblies in UL R19331


See test reports (in below links) for detailed requirements of construction of assembly.

CDSC Sound Assemblies on 2x4 Wood Studs

Fire Rating UL Assembly Wall Framing Stud Spacing Wall Board (Side1/Side2) Insul STC Rating OITC Rating Test Report
    2x4 Wood Studs 16"o.c. (1) Layer / (1) Layer - 5/8" Type X R-19 53   TL18-201
    2x4 Wood Studs 16"o.c. (1) Layer / (1) Layer - 5/8" Type C R-19 60   TL18-288
    2x4 Wood Studs 16"o.c. (1) Layer / (2) Layer - 5/8" Type X R-19 57   TL18-204
    2x4 Wood Studs 16"o.c. (1) Layer / (2) Layer - 5/8" Type C R-19 61   TL18-289
    2x4 Wood Studs 16"o.c. (2) Layer / (2) Layer - 5/8" Type X R-19 61   TL18-205
    2x4 Wood Studs 16"o.c. (2) Layer / (2) Layer - 5/8" Type C R-19 62   TL18-290
2 Hr U301 2x4 Wood Studs 16"o,c, (2) Layer / (2) Layer - 5/8" Type X R-13 60 47 L3173.01-113-R0
1 HR U309 2x4 Wood Studs 24"o.c. (1) Layer / (1) Layer - 5/8" Type X R-19 53 37 L3173.17-113-R0
1 HR U311 2x4 Wood Studs 24"o.c. (1) Layer / (1) Layers - 5/8" Type C R-19 55 39 L3173.18-113-R0
1 HR U340 2x4 Wood Studs - Chase Wall 12"o.c. Staggered (1) Layer / (1) Layers - 5/8" Type X R-19 57 43 L3173.21-113-R0
1 HR U341 2x4 Wood Studs - Chase Wall 24"o.c. (1) Layer / (1) Layer - 5/8" Type X R-19 60 45 L3173.20-113-R0
1 HR U344 2x4 Wood Studs 24"o.c. (1) Layer 5/8" Type X / (1) Layer 5/8" Plywood + 5/8" Type X R-19 57 41 L3173.19-113-R0
1 HR U356 2x4 Wood Studs 16"o.c. 7/16" Plywood / (1) Layers - 5/8" Type X R-13 51 34 L3173.02-113-R0

 

CDSC Sound Assemblies on Metal Stud Framing 

Fire Rating UL Assembly Wall Framing Stud Spacing Wall Board (Side1/Side2) Insulation STC Rating OITC Rating Test Report
    3-5/8" ProSTUD 20 (33mil) 24" o.c. (1) Layer  / (1) Layer  -  5/8" Type C R-19 60   TL18-291
    3-5/8" ProSTUD 20 (33mil) 24" o.c. (1) Layers  / (2) Layers  -  5/8" Type C R-19 62   TL18-292
    3-5/8" ProSTUD 20 (33mil) 24" o.c. (2) Layers  / (2) Layers  -  5/8" Type C R-19 63   TL18-293
    3-5/8" ProSTUD 25 (15mil) 16" o.c. (1) Layer  / (1) Layer  -  5/8" Type X R-11 56   TL18-199
    3-5/8" ProSTUD 25 (15mil) 16" o.c. (1) Layer  / (2) Layers  -  5/8" Type X R-11 60   TL18-197
    3-5/8" ProSTUD 25 (15mil) 16" o.c. (2) Layers  / (2) Layers  -  5/8" Type X R-11 62   TL18-197

2 Hr

U411 2-1/2" ProSTUD 25 (15mil) 24"o.c. (2) Layers  / (2) Layers  - 5/8" Type X R-13 62 48 L3173.08-113-11-R0
3/4 Hr U423 3-1/2" Structural Stud (33mil) 24"o.c. (1) Layers  / (1) Layers  - 1/2" Type C R-19 53 37 L3173.10-113-11-R0
1 Hr U423 3-1/2" Structural Stud (33mil) 24"o.c. (1) Layers  / (1) Layers  - 5/8" Type X R-19 55 38 L3173.12-113-11-R0
1-1/2 Hr U423 3-1/2" Structural Stud (33mil) 24"o.c. (2) Layers  / (2) Layers  - 1/2" Type C R-19 62 48 L3173.11-113-11-R0
2 Hr U423 3-1/2" Structural Stud (33mil) 24"o.c. (2) Layers  / (2) Layers  - 5/8" Type X R-19 63 50 L3173.13-113-11-R0
1 Hr U465 3-5/8" ProSTUD 20 (18mil) 24"o.c. (1) Layers  / (1) Layers  - 5/8" Type X None 45 29 L3173.03-113-11-R0
1 Hr U465 3-5/8" ProSTUD 20 (18mil) 24"o.c. (1) Layers  / (1) Layers  - 5/8" Type X Mineral Wool 53 36 L3173.04-113-11-R0
1 Hr U465 3-5/8" ProSTUD 20 (18mil) 24"o.c. (1) Layers  / (1) Layers  - 5/8" Type X R-13 53 37 L3173.05-113-11-R0
1 Hr U493 (2) 2-1/2" ProSTUD 25 (15mil) - ChaseWall 24"o.c. (1) Layers  / (1) Layers  - 5/8" Type X R-13 Both Sides 60 44 L3173.06-113-11-R0
2 Hr U493 (2) 2-1/2" ProSTUD 25 (15mil) - ChaseWall 24"o.c. (2) Layers  / (2) Layers  - 5/8" Type X R-13 Both Sides 67 53 L3173.07-113-11-R0
1 HR V438 2-1/2" ProSTUD 25 (15mil) 24"o.c. (1) Layers  / (1) Layers  - 1/2" Type C R-13 49 34 L3173.09-113-11-R0
2 Hr V438

1-5/8" ProSTUD 25 (15mil)

24"o.c. (2) Layers  / (2) Layers  - 1/2" Type C 2-3/4" Fiberglass 59 42 L3173.14-113-11-R0
3 Hr V438 1-5/8" ProSTUD 25 (15mil) 24"o.c. (3) Layers  / (3) Layers  - 1/2" Type C 2-3/4" Fiberglass 63 49 L3173.15-113-11-R0
4 Hr V438 1-5/8" ProSTUD 25 (15mil) 24"o.c. (4) Layers  / (4) Layers  - 1/2" Type C 2-3/4" Fiberglass 66 53 L3173.16-113-11-R0

 

10" TradeReady® Steel Joists w/Levelrock

(UL Design No. G551)

Material Description STC IIC Test Report  
Carpet w/ Pad 55 80 J4775.02 Add to top
of Levelrock®
Ceramic w/ NobleSeal® 57 50 J4775.06
Shaw Engineered Wood 54 50 J4775.03
Shaw Como Vinyl 12mm 55 48 J4775.04
Shaw Expo Vinyl 6mm 54 47 J4775.05
Baseline System
(Nothing on top of Levelrock)
(See full material list here)

Ceiling: (1) layer 5/8" Type C
54 43 J4775.01 Baseline
System
+(1) Gypsum C-Core Layer
with:
Shaw Expo Vinyl 6mm
on top of the floor
58 51 J4775.07 Add to bottom
of ceiling

12" Wood Truss Joist (TJI) w/Levelrock

With (2) layers 1/2" Type C attached to hat channel
(UL Design No. UL-L518)

Material Description STC IIC Test Report  
Carpet w/ Pad 62 84 J4776.03 Add to top
of Levelrock®
Ceramic w/ NobleSeal® 63 56 J4776.07
Shaw Engineered Wood 62 56 J4776.04
Shaw Como Vinyl 12mm 62 54 J4776.05
Shaw Expo Vinyl 6mm 61 53 J4776.06
Baseline System
(Nothing on top of Levelrock)

Ceiling: (2) layers 1/2" Type C
62 50 J4776.02 Baseline
System

 

Other 12" Wood Truss Joist (TJI) Acoustical Tests

(UL Design No. UL-L518)

Material Description STC IIC Test Report
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (3) layers 1/2" Type C

62 55 J4776.08

 

Same baseline system (Unrated) 

Material Description STC IIC Test Report
Ceramic w/ NobleSeal®
(On top of Levelrock)

Ceiling: (1) layer 1/2" Type C

62 53 J4776.01

16" Wood Open Web Truss (OWT) w/levelrock

With (1) layer 5/8" Type C attached to hat channel
(UL Designs: L521, L528, L546, L550, L558, L563, L574, L576, L587, L592, M508)

Material Description STC IIC Test Report  
Carpet w/ Pad 59 79 J4777.02 Add to top
of Levelrock®
Ceramic w/ NobleSeal® 59 53 J4777.06
Shaw Engineered Wood 58 53 J4777.03
Shaw Como Vinyl 12mm 58 51 J4777.04
Shaw Expo Vinyl 6mm 58 51 J4777.05
Baseline System
(Nothing on top of LevelRock)

Ceiling: (1) layer 5/8" Type C attached to hat channel
58 50 J4777.01 Baseline
System

 

Other 16" Wood Open Truss (OWT) Acoustical Tests

With (2) or more layers 5/8" Type C attached to hat channel
(UL Designs: L521, L528, L542546, L550, L558, L563, L574, L576, L587, L592, M508)

Material Description STC IIC Test Report
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (2) layers 5/8" Type C attached to hat channel

61 55 J4777.07
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (3) layers 5/8" Type C attached to hat channel

62 55 J4777.08

16" wood Open Web truss (OWT) w/levelrock

With (1) layer 5/8" Type C on the bottom of the joist + (2) Layers 5/8" Type C attached to hat channel
(UL Design No. UL-M510)

Material Description STC IIC Test Report  
Carpet w/ Pad 58 75 J4778.02 Add to top
of Levelrock®
Ceramic w/ NobleSeal® 57 51 J4778.06
Shaw Engineered Wood 58 50 J4778.03
Shaw Como Vinyl 12mm 58 49 J4778.04
Shaw Expo Vinyl 6mm 58 50 J4778.05
Baseline System
(Nothing on top of LevelRock)

UL Design No. UL-M510

Ceiling: (1) layer 5/8" Type C
+(2) layers 5/8" Type C attached to hat channel
58 50 J4778.01 Baseline
System

 

Other 16" Wood Open Truss (OWT) Acoustical Tests

With (1) layer 5/8" Type C on the bottom of the joist + (3) Layers 5/8" Type C attached to hat channel
(UL Design No. UL-M510)

Material Description STC IIC Test Report
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (1) layer 5/8" Type C +(3) layers 5/8" Type C attached to hat channel

62 55 J4778.08

 

(Not Rated)
With (1) layer 5/8" Type C on the bottom of the joist + (1) Layers 5/8" Type C attached to hat channel

Material Description STC IIC Test Report
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (1) layer 5/8" Type C attached to hat channel

61 55 J4778.07

18" wood Open Web truss (OWT) w/levelrock

With (1) layer 5/8" Type C attached to hat channel
(UL Designs: L521, L528, L546, L550, L558, L563, L574, L576, L587, L592, M508, L534, L562, M503)

Material Description STC IIC HIIC Test Report  
2mm LVT Glue Down 62 55 55 P2294.05 Add to top
of Levelrock®
5.5mm LVT with RST02PS Sound Mat 61 59 65 P2294.02
Engineered Wood 61 59 67 P2294.04
Carpet with Pad 62 82 90 P2294.06
Ceramic Tile 61 51 51 P2294.07
Baseline System
(Nothing on top of LevelRock)
Ceiling: (1) layer 5/8" Type C
62 51 50 P2294.03 Baseline
System

 

Other 18" Wood Open Truss (OWT) Acoustical Tests

With (1) layer 5/8" Type X attached to hat channel
(UL Designs: L521, L528, L546, L550, L558, L563, L574, L576, L587, L592, M508, L534, L562, M503)

Material Description STC IIC HIIC Test Report  
           
5.5mm LVT with RST02PS Sound Mat 61 58 66 P2294.01 Add to top
of Levelrock®
Baseline System
(Nothing on top of LevelRock)
Ceiling: (1) layer 5/8" Type X
62 50 50 P2294.09 Baseline
System

8" Concrete Slab w/ (1) Layer Gypsum Ceiling

(1) layer 5/8" Type X attached to hat channel
 

Material Description STC / Test Report IIC / Test Report
Carpet Tiles 62
RAL-TL21-030
61
RAL-IN21-009
Vinyl Planks 7mm 63
RAL-TL21-031
61
RAL-IN21-010
Baseline
(Concrete Floor Only)
Nothing on top or bottom
58
RAL-TL21-080

30
RAL-IN21-014

Bare Concrete Floor
(Nothing on top of 8" Concrete)

Ceiling:
R-6.7 unfaced fiberglass insulation
+ (1) layer 5/8" Type X
62
RAL-TL21-032
60
RAL-IN21-011

 

Wall tests were performed in accordance with:

  • ASTM E90 - Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions
  • ASTM E2235 - Standard Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods

Floor/Ceiling test were performed in accordance with:

  • ASTM E90 - Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions
  • ASTM E413 - Classification for Rating Sound Insulation
  • ASTM E492 - Standard Test Method for Laboratory Measurement of Impact Sound Transmission  Through Floor-Ceiling Assemblies Using the Tapping Machine
  • ASTM E989 - Classification for Determination of Impact Insulation Class (IIC)
  • ASTM E2235 - Standard Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods

 

 

Installation

CDSC Installation Guide

Fasteners:

  • CDSC to Wood Framing Studs:
    #8 x 2-1/2" minimum size coarse thread screw (Recommended #12 or #10 x 2-1/2" hex head)
  • CDSC to Steel Framing Studs:
    #8 x 1-1/2" minimum size fine thread screw (Recommended #12 or #10 x 1-5/8" hex head)
  • CDSC to Concrete or CMU:
    1/4” drop-in anchor, 1/4” drive spike, 3/16” x tapcon, shoot in pin with washer, or product with equal load capabilities (Minimum 120 lbs Ultimate, Sheer and Pullout).
    Length of fastener determined by the concrete type, strength, and fastener min embed requirements.
  • DO NOT attach CDSC to framing members with nails.
  • (Only use approved screws)

Code Approvals & Performance Standards

  • ASTM A653 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
  • ASTM A1003 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
  • ASTM D395 Standard Test Methods for Rubber Property - Compression Set
  • ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomer - Tension
  • ASTM D573 Standard Test Method for Rubber - Deterioration in an Air Oven
  • ASTM D1149 Standard Test Methods for Rubber Deterioration - Cracking in an Ozone Controlled Environment
  • ASTM D2000 Standard Classification System for Rubber Products in Automotive Applications
  • ASTM D2137 Standard Test Methods for Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics
  • ASTM D2240 Standard Test Method for Rubber Property - Durometer Hardness
  • UL File Number R19331 Full list of ProSTUD, Spazzer, Resilient Channel, Sound Clip and Barrier Mesh UL design assemblies
  • SDS CD Sound Clip Interior framing sound improvement

Product Submittal Sheets

Click the below Product Code to view Submittal/Tech Datasheet.

Product Code Description
CDSC ClarkDietrich Sound Clip™

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