Stc Concrete Board Wall

Sound transmission class or stc is an integer rating of how well a building partition attenuates airborne sound.

Stc concrete board wall.

Metal stud walls perform better than wood stud walls. Usg durock cement board is not designed for use as a structural panel. 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. Gypsum board each side provides stc 63 and a wall footprint 10 3 4 in deep. Maximum installed weight of the finish system should not exceed 15 psf. 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.

Insulation will noticeably improve the stc rating of an assembly. With 1 25 mm type s drywall screws 12 305 mm o c. Determining sound transmission class stc for concrete masonry. Double 2 x 4 stud wall with two layers of 5 8 in.

Gypsum board end joints located midway between continuous channels and attached to additional pieces of channel 54 1372 mm long with screws at 12 305. Do not use 1 4 usg durock cement board for wall or ceiling applications. 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. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

The stc ratings for masonry walls also can be improved by filling the cores of hollow units with sand or creating a cavity wall. 8 concrete block hollow core painted 2 coats 2 sides. Outside the us the sound reduction index sri iso index is used. Staggered or double stud walls are higher rated than single stud walls.

Attaching gypsum board to a masonry wall with resilient clips can increase the stc rating by 12 to 15 points ref. While effective for high stc the two walls take additional floor space and have a higher material cost than single stud construction. 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. 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.

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.