Stc Concrete Board Wall

8 concrete block hollow core no wall finish.

Stc concrete board wall.

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. Stc ratings for wall floor and window materials and assemblies 3 appendix a stc ratings a 1 walls a 1 exterior a 1 interior a 9 wooden studs a 9 metal studs a 14 floors a 16 wood a 16 concrete a 21 windows a 24 doors a 27 exterior a 27 interior a 29 appendix b references b 1. Metal stud walls perform better than wood stud walls. Usg durock cement board is not designed for use as a structural panel.

Do not use 1 4 usg durock cement board for wall or ceiling applications. Staggered or double stud walls are higher rated than single stud walls. Plaster board on one side and 1 layer of 16mm on the other side on a horizontal flexible channel at 600mm 2ft centres screwed to the stud. Double 2 x 4 stud wall with two layers of 5 8 in.

While effective for high stc the two walls take additional floor space and have a higher material cost than single stud construction. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Determining sound transmission class stc for concrete masonry. 1 2 12 7 mm toughrock fireguard c or 1 2 12 7 mm densarmor plus fireguard c gypsum panels applied perpendicular to rigid furring channels 24 610 mm o c.

Outside the us the sound reduction index sri iso index is used. 8 concrete block hollow core painted 2 coats 2 sides. To view different wall assemblies click on each point below that may apply to your project. In the us it is widely used to rate interior partitions ceilings floors doors windows and exterior wall configurations.

Standard stud wall with one layer of 16mm 5 8 plasterboard. Attaching gypsum board to a masonry wall with resilient clips can increase the stc rating by 12 to 15 points ref. The stc ratings for masonry walls also can be improved by filling the cores of hollow units with sand or creating a cavity wall. Do not use usg durock cement board with vinyl flooring.

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. T h e r e c o m m e n d e d s t c o f a wall is the numerical difference between two sound levels. Maximum installed weight of the finish system should not exceed 15 psf. Sound transmission class or stc is an integer rating of how well a building partition attenuates airborne sound.

Insulation will noticeably improve the stc rating of an assembly.