Stc 50 Wall Assembly

Resilient channel can improve the stc rating of an assembly.

Stc 50 wall assembly.

Nevertheless stc 50 ings are. 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. The field test evaluates the dwelling s actual construction and includes all sound paths. Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 03.

Stc ratings of 50 if tested in a laboratory or 45 if tested in the field. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Is the minimum rating by state law. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.

Insulation will noticeably improve the stc rating of an assembly. Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. 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. An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.

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. Doubling the mass of a wall assembly does not double the stc rating. Ubc requirements for floor ceiling assemblies. 50 stc with single layer designs.

Metal stud walls perform better than wood stud walls. Adding additional layers of drywall can improve the stc rating of an assembly. Transmission the passage of sound waves from its source through a vibrating medium and to a listener. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

Staggered or double stud walls are higher rated than single stud walls. 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. Sound transmission flanking paths in build shows an stc of 50. 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.