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.

Found In:
Clips & Connectors > Specialty Clips & Connectors
Interior Framing > Sound-Rated Systems
Description

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

Product Data & Ordering Information

Product code Dimensions Thickness Yield Strength Coating Pcs./Ctn.
CDSC 3" x 1-1/4"
(Clip only)		 43mil (18ga) 33ksi G60 100
Technical Data

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   TL18-194

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  - 1/2" 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
Ceramic w/ NobleSeal®
(On top of Levelrock)

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

 62 53 J4776.01
Shaw Expo Vinyl 2mm
(On top of Levelrock)

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

 62 55 J4776.08

 

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

With (1) layer 5/8" Type C attached to hat channel
(UL Design No. UL-L521)

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		 58 50 J4777.01 Baseline
System

 

Other 16" Wood Open Truss (OWT) Acoustical Tests

(UL Design No. UL-L521)

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

Ceiling: (2) layers 5/8" Type C

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

Ceiling: (3) layers 5/8" Type C

 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		 58 50 J4778.01 Baseline
System

 

Other 16" Wood Open Truss (OWT) Acoustical Tests

(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

 61 55 J4778.07
Shaw Expo Vinyl 2mm
(On top of Levelrock)

Ceiling: (3) layers 5/8" Type C

 62 55 J4778.08

 

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

 

8" Concrete Slab w/ (2) Layers Gypsum Ceiling

(2) layers 5/8" Type X attached to hat channel
 

Material Description STC / Test Report IIC / Test Report
Carpet Tiles 63
RAL-TL21-029		 61
RAL-IN21-008
Vinyl Planks 7mm 63
RAL-TL21-020		 64
RAL-IN21-003
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
+ (2) layers 5/8" Type X		 63
RAL-TL21-027		 64
RAL-IN21-006

 

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

Installation

CDSC Installation Guide

Attachment to Framing Studs:

  • Fasteners for Wood Framing Studs:
    #8 x 2-1/2" minimum size coarse thread screw (Recommended #12 or #10 x 2-1/2" hex head)
  • Fasteners for Steel Framing Studs:
    #8 x 1-1/2" minimum size fine thread screw (Recommended #12 or #10 x 1-5/8" hex head)
  • DO NOT attach CDSC to framing members with nails.
    (Only use approved screws)
Resources

Comparison Guides

Steel Wall Assembly

Wood Wall Assembly

Installation

CDSC Installation Guide


Catalog Pages

 

ASTM & Code Standards:

  • Sheet steel meets or exceeds requirements of ASTM A1003
  • Galvanized coating meets or exceeds requirements of ASTM A653
  • Rubber grommet meets or exceeds ASTM: D395, D412, D573, D1149, D2000, D2137, D2240
  • Complies to UL 263 test standards. See full list of UL design assemblies in UL R19331
Submittals

Product Submittal Sheets

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

Product Code Description
CDSC ClarkDietrich Sound Clip™

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