In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.
Stc 50 rated wall assembly.
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.
Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.
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.
Stc 50 lab test 5 tl 93 333 alternative stc 50 wall options.
Insulation will noticeably improve the stc rating of an assembly.
An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.
Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.
Staggered or double stud walls are higher rated than single stud walls.
Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.
Through base layer perpendicular to.
Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound.
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.
Resilient channel can improve the stc rating of an assembly.
5 8 gypsum board type x 1 layer one side 2 layers on the other side.
3 5 8 steel studs 25 gauge spaced 16 on center.
Airborne sound passes through a space by vibrating the air.
Resilient channels attached 16 406 mm o c.
This catalog of sound rated wall and the purpose of the indexing system is.
Metal stud walls perform better than wood stud walls.
Transmission the passage of sound waves from its source through a vibrating medium and to a listener.
Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c.
5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 15 9 mm densarmor plus fireguard c gypsum panels applied perpendicular to i shaped wood joists or wood and steel trusses spaced 19 2 488 mm o c.
Doubling the mass of a wall assembly does not double the stc rating.
