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.
Stc concrete board wall. The sound transmission class stc measured in decibels is used to measure building material s ability to absorb sound. The stc of a wall is determined by comparing sound transmission loss stl values at various frequencies to a standard contour. While effective for high stc the two walls take additional floor space and have a higher material cost than single stud construction. Similarly in masonry assemblies stc is governed by the thickness of block or concrete mass of the material and its porosity.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. The stc can be used to measure sound absorption for both external building walls and internal walls in single and multifamily structures. The stc is measured by positioning a representative. This catalog of sound rated wall and the purpose of the indexing system is.
The typical brick veneer construction with a layer of 10mm 3 8 plasterboard. Adding additional layers of drywall can improve the stc rating of an assembly. Staggered stud wall construction with 3 layers of 16mm 5 8 plasterboard on studs of 95x35mm 4 x 11 2 on a 120mm 4 3 4 common base. Insulation will noticeably improve the stc rating of an assembly.
Resilient channel can improve the stc rating of an assembly. Metal stud walls perform better than wood stud walls. Staggered or double stud walls are higher rated than single stud walls. Also an ideal underlayment for tile on floors and countertops in new construction and remodeling.
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. Gypsum board each side provides stc 63 and a wall footprint 10 3 4 in deep. Double 2 x 4 stud wall with two layers of 5 8 in.
In stud wall assemblies stc is governed by the type of studs used metal or wood number of studs used single double or triple stud walls the number of layers of gypsum board in the wall assembly the amount of insulation in the stud cavities and the type of isolation elements used resilient channels neoprene isolators etc if any.