Stc And Iic Ratings For Wall And Floor Ceiling Assemblies

Stc is calculated by taking the transmission loss tl values tested at 16 standard frequencies over the range of 125 hz to 4000 hz and plotted on a graph.

Stc and iic ratings for wall 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. 35 39 stc and 32 iic. Walls and floor ceiling assemblies need to be insulated for airborne sound to achieve a stc of 50 or more. A heavy carpet and high quality pad work best to improve the iic value of a floor ceiling.

Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. Catalog of stc and iic ratings for wall and floor ceiling assemblies can be found from various sources on the internet but includes many dated tests which may have been conducted with older standards. Base layer 1 x 24 toughrock shaftliner or densglass shaftliner panels between 2 1 2 floor and ceiling j runners with t.

Manufacturers who are interested in selling products such as gypsum board neoprene. The best way to deal with impact noise is to cushion the actual blow or impact. These include the finish floor the substrate and the ceiling system below in addition to your choice of sound mat or soundproofing underlayment. A floating floor is another way to significantly improve an.

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. 35 39 stc and 32 iic 66 w c p. This catalog of sound rated wall and the purpose of the indexing system is.

In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Search for georgia pacific assemblies by selecting an assembly type hourly rating stc rating or product type above or type part of a assembly name. The stc number is roughly the reduction in decibels that a partition creates in the 125 hz to 4 000 hz range. Sound transmission class stc is a rating of how well a building partition attenuates airborne sound.

Use our iic calculator below to determine what iic your flooring system achieves. There are a number of factors that determine the impact insulation class or iic of your floor ceiling assembly. A word of caution. Sound ratings gypsum board assemblies are laboratory tested to establish their sound insulation characteristics.

Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic.