Stc 50 Rated Wall Assembly

Transmission the passage of sound waves from its source through a vibrating medium and to a listener.

Stc 50 rated wall assembly.

Resilient channels attached 16 406 mm o c. This catalog of sound rated wall and the purpose of the indexing system is. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. 3 thick rockwool afb semi rigid batt insulation.

Through base layer perpendicular to. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Ultimately the design and detailing of the project assembly or system is the responsibility of a professional and all projects must comply with applicable building.

An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35. Staggered or double stud walls are higher rated than single stud walls. Stc 50 lab test 5 tl 93 333 alternative stc 50 wall options. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.

Insulation will noticeably improve the stc rating of an assembly. Airborne sound passes through a space by vibrating the air. Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c.

Adding additional layers of drywall can improve the stc rating of an assembly. Stc is calculated by taking the transmission loss tl values tested at 16 standard frequencies over the range of 125 hz to 4000 hz and plotted on a graph. Metal stud walls perform better than wood stud walls. The stc rating shown reflects testing or evaluation of an assembly with one or more products under test conditions and may not apply to all products listed for each assembly.

Doubling the mass of a wall assembly does not double the stc rating. Resilient channel can improve the stc rating of an assembly. 3 5 8 steel studs 25 gauge spaced 16 on center. Sound transmission measurement of the ability of a wall or floor assembly to isolate airborne sound and prevent it from passing from one class stc side to the other.