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