Stc And Iic Ratings For Wall And Floor Ceiling Assemblies

Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and the other cavity absorption.

Stc and iic ratings for wall and floor ceiling assemblies.

This catalog of sound rated wall and the purpose of the indexing system is. Astm e90 standard test. Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic. Airborne sound insulation is reported as the sound transmission class stc.

35 39 stc and 32 iic 66 w c p. Partitions and floor ceiling assemblies constructed in accordance with the diagrams shown herein are considered to have sound transmission class stc ratings and impact insulation class iic ratings of 50 as shown. Sound ratings gypsum board assemblies are laboratory tested to establish their sound insulation characteristics. Structure borne sound travels through wall partitions ceilings and floor ceiling assemblies.

Faced concrete block wall floor and ceiling assemblies solid wood floor joist assemblies wood i joist assemblies wood truss assemblies steel joist floors. Transmission the passage of sound waves from its source through a vibrating medium and to a listener. Toughrock shaftliner or densglass shaftliner panel inserted between 2 1 2 floor and ceiling j runners with h section of 2 1 2. Walls and both airborne and impact sound insulation for floor ceiling assemblies.

Airborne sound passes through a space by vibrating the air. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. 35 39 stc and 32 iic.