Stc 50 Wall Assembly

Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c wallboard or densarmor plus fireguard c panels and 3 1 2 89 mm fiberglass insulation in stud space.

Stc 50 wall assembly.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Airborne sound passes. Nevertheless stc 50 ings are. Insulation will noticeably improve the stc rating of an assembly.

Transmission the passage of sound waves from its source through a vibrating medium and to a listener. Doubling the mass of a wall assembly does not double the stc rating. The field test evaluates the dwelling s actual construction and includes all sound paths. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

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. Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 03. 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 assembly rated at stc 50 will satisfy the building code requirement.

Adding additional layers of drywall can improve the stc rating of an assembly. Metal stud walls perform better than wood stud walls. 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. Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound.

Is the minimum rating by state law. When discrepancies appear among laboratory stc ratings for essentially similar assemblies and when the discrepancies are above and below stc 50 field testing may be required to. Ubc requirements for floor ceiling 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.

In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Resilient channel can 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. Sound transmission flanking paths in build shows an stc of 50.