Stc And Iic Ratings For Wall And Floor Ceiling Assemblies
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Airborne sound passes through a space by vibrating the air.
Stc and iic ratings for wall and floor ceiling assemblies. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b. 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. 35 39 stc and 32 iic. Astm e90 standard test.
Walls and both airborne and impact sound insulation for floor ceiling assemblies. Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and the other cavity absorption. Airborne sound insulation is reported as the sound transmission class stc. 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. Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic. Class stc side to the other. Toughrock shaftliner or densglass shaftliner panel inserted between 2 1 2 floor and ceiling j runners with h section of 2 1 2.
This catalog of sound rated wall and the purpose of the indexing system is. 35 39 stc and 32 iic 66 w c p. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.
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