Stc 50 Cmu Wall

Sound transmission class or stc is an integer rating of how well a building partition attenuates airborne sound in the us it is widely used to rate interior partitions ceilings floors doors windows and exterior wall configurations.

Stc 50 cmu wall.

Metal stud walls 1 4. Area separation wall systems area separation wall submittal sheet sa925 wb2129 sheetrock shaft wall systems tested systems achieve up to 58 stc. 5 8 gypsum board type x 1 layer one side 2 layers on the other side. To view different wall assemblies click on each point below that may apply to your project.

Many sound transmission loss tests have been per formed on various concrete masonry walls. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Each assembly in the catalog is drawn 1 2. One has an stc 47 4 solid concrete the other an stc 48 steel stud wall.

There are numerous other issues that need to be addressed to. 3 5 8 steel studs 25 gauge spaced 16 on center. 3 thick rockwool afb semi rigid batt insulation. Metal stud walls perform better than wood stud walls.

The estimate could easily be off by as much as 4 db. Masonry walls presented beside a summary description of the correct choice here would be 1 2. Insulation will noticeably improve the stc rating of an assembly. Note that in the low frequency range important for music theaters traffic aircraft and most other real world noise sources the lower stc wall is literally 30 decibels better yet lower stc.

In general the stl of a concrete masonry wall increases with increasing frequency of the sound. Stc 50 lab test 5 tl 93 333 alternative stc 50 wall options. Stc 0 18w 40 where w pounds per square foot psf this information is provided as a tool to help estimate. Studless walls tion in the example.

Sound transmission class stc provides an estimate of the acoustic performance of a wall in certain common airborne sound insulation applications the stc of a wall is determined by comparing sound transmission loss stl values at various frequencies to a standard contour stl is the decrease or attenuation in sound energy in db. The stc rating of a cmu wall can be estimated based on its weight using the following formula. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Staggered or double stud walls are higher rated than single stud walls.

Other informa wood stud walls. We see two walls. Wood stud walls to a scale of one inch one foot and 1 3.