Stc 50 Wall Assembly

Ubc requirements for floor ceiling assemblies.

Stc 50 wall assembly.

An assembly rated at stc 50 will satisfy the building code requirement. Airborne sound passes. 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. Is the minimum rating by state law.

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. An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35. Nevertheless stc 50 ings are.

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 ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 03. 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. 50 stc with single layer designs. Resilient channel can improve the stc rating of an 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.

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. 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. Staggered or double stud walls are higher rated than single stud walls. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. The field test evaluates the dwelling s actual construction and includes all sound paths. Insulation will noticeably improve the stc rating of an assembly. 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.