Stc 50 Wall Section

Alternative stc 50 wall build ups high stc ratings can be achieved without the use of special acoustical products if the gauge of the steel studs is soft.

Stc 50 wall section.

Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. Area separation wall systems area separation wall submittal sheet sa925 wb2129 sheetrock shaft wall systems tested systems achieve up to 58 stc. 5 8 gypsum board type x 1 layer one side 2 layers on the other side. Weigh at least 50 less than masonry walls allowing faster easier installation for more information see the following brochures.

3 5 8 steel studs 25 gauge spaced 16 on center. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

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. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. However the soft gauge studs reduce the stiffness of a wall and limit the amount of weight the wall can hold. 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.

Figure 2 resilient channels over wood studs break the vibration path helping to 1increase sound transmission loss stc. Doubling the mass of a wall assembly does not double the stc rating. Figure 1 the addition of gypsum board to one surface effectively increases wall mass. A soft metal stud will reduce the efficiency of transmitted vibrations noise.

Resilient channels attached 16 406 mm o c. 3 thick rockwool afb semi rigid batt insulation. An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.