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 acoustical 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 acoustical 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 STC Sound Assemblies on 3-5/8" ProSTUD

Wall Framing Stud Spacing Wall Board (Side1/Side2) Insulation STC Rating Test Report
3-5/8" ProSTUD 20 (33mil) 24"o.c. (1) layer / (1) layer - Type C R-19 60 TL18-291
3-5/8" ProSTUD 20 (33mil) 24"o.c. (1) layer / (2) layers - Type C R-19 62 TL18-292
3-5/8" ProSTUD 20 (33mil) 24"o.c. (2) layers / (2) layers - Type C R-19 63 TL18-293
3-5/8" ProSTUD 25 (15mil) 16"o.c. (1) layer / (1) layer - Type X R-11 56 TL18-199
3-5/8" ProSTUD 25 (15mil) 16"o.c. (1) layer / (2) layers - Type X R-11 60 TL18-197
3-5/8" ProSTUD 25 (15mil) 16"o.c. (2) layers / (2) layers - Type X R-11 62 TL18-194

 

CDSC STC Sound Assemblies on 2x4 Wood Studs

Wall Framing Stud Spacing Wall Board (Side1/Side2) Insulation STC Rating Test Report
2x4 Wood Studs 16"o.c. (1) layer / (1) layer - Type X R-19 53 TL18-201
2x4 Wood Studs 16"o.c. (1) layer / (1) layer - Type C R-19 60 TL18-288
2x4 Wood Studs 16"o.c. (1) layer / (2) layers - Type X R-19 57 TL18-204
2x4 Wood Studs 16"o.c. (1) layer / (2) layers - Type C R-19 61 TL18-289
2x4 Wood Studs 16"o.c. (2) layers / (2) layers - Type X R-19 61 TL18-205
2x4 Wood Studs 16"o.c. (2) layers / (2) layers - Type C R-19 62 TL18-290

 

10" TradeReady® Steel Joists w/levelrock
(UL Design No. G551)

 

  Material Description STC IIC Test Report
Carpet w/ Pad 55 80 J4775.02
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
(See full material list here)

UL Design No. G551

Ceiling: (1) layer 5/8" Type C		 54 43 J4775.01
+(1) Gypsum C-Core Layer
with:
Shaw Expo Vinyl 6mm
on top of the floor

UL Design No. G551		 58 51 J4775.07

 

16" wood Open Web truss (OWT) w/levelrock
(UL Design No. UL-L521)

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

  Material Description STC IIC Test Report
Carpet w/ Pad 59 79 J4777.02
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)

UL Design No. UL-L521

Ceiling: (1) layer 5/8" Type C		 58 50 J4777.01

 

16" wood Open Web truss (OWT) w/levelrock
(UL Design No. UL-M510)

With (1) layer 5/8" Type C on the bottom of the joist + (2) Layers 5/8" Type C attached to hat channel

  Material Description STC IIC Test Report
Carpet w/ Pad 58 75 J4778.02
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

12" wood Truss Joist (TJI) w/levelrock
(UL Design No. UL-L518)

With (2) layers 1/2" Type C attached to hat channel
 

  Material Description STC IIC Test Report
Carpet w/ Pad 62 84 J4776.03
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)

UL Design No. UL-L518

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

 

Wall Tests:
The test was performed in accordance with ASTM E 90-09 (2016), Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and ASTM E2235-04 (2012), Standard Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods.

Floor/Ceiling Tests:
Available from ClarkDietrich Technical Services and will be posted online soon.

 

 

 

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

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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