Stc 50 Wall Section

Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. 3 thick rockwool afb semi rigid batt insulation.

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

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. However the soft gauge studs reduce the stiffness of a wall and limit the amount of weight the wall can hold. Doubling the mass of a wall assembly does not double the stc rating. A soft metal stud will reduce the efficiency of transmitted vibrations noise.

Stc 50 lab test 5 tl 93 333 alternative stc 50 wall options. Weigh at least 50 less than masonry walls allowing faster easier installation for more information see the following brochures. Figure 1 the addition of gypsum board to one surface effectively increases wall mass. 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.

3 5 8 steel studs 25 gauge spaced 16 on center. Resilient channels attached 16 406 mm o c. Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound.

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. Area separation wall systems area separation wall submittal sheet sa925 wb2129 sheetrock shaft wall systems tested systems achieve up to 58 stc. Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and. 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. Figure 2 resilient channels over wood studs break the vibration path helping to 1increase sound transmission loss stc. Through base layer perpendicular to.

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