Stc Concrete Board Wall

Attaching gypsum board to a masonry wall with resilient clips can increase the stc rating by 12 to 15 points ref.

Stc concrete board wall.

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. 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. 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.

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. Insulation will noticeably improve the stc rating of an assembly. Staggered or double stud walls are higher rated than single stud walls. Outside the us the sound reduction index sri iso index is used.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. 8 concrete block hollow core no wall finish. Determining sound transmission class stc for concrete masonry. 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.

Do not use 1 4 usg durock cement board for wall or ceiling applications. 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. 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. Standard stud wall with one layer of 16mm 5 8 plasterboard.

Double 2 x 4 stud wall with two layers of 5 8 in. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Usg durock cement board is not designed for use as a structural panel. While effective for high stc the two walls take additional floor space and have a higher material cost than single stud construction.

To view different wall assemblies click on each point below that may apply to your project. 8 concrete block hollow core painted 2 coats 2 sides. Metal stud walls perform better than wood stud walls. With 1 25 mm type s drywall screws 12 305 mm o c.

Maximum installed weight of the finish system should not exceed 15 psf.