Stc 50 Rated Wall Assembly

Use non hardening acoustical sealant at penetrations and floor ceiling and wall intersections to prevent flanking paths for sound.

Stc 50 rated wall assembly.

Moisture resistant assemblies aesthetic assemblies sa932 sa933 sheetrock gypsum panels submittal sheet wb1473 usg area separation walls. 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. 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.

In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window 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. Fire resistance ratings with 3 4 ultracode core panels in steel framed partition assemblies for more information see the following brochures. 50 stc with single layer designs have achieved up to 4 hr.

Insulation will noticeably improve the stc rating of an assembly. Doubling the mass of a wall assembly does not double the stc rating. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.

Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. Staggered or double stud walls are higher rated than single stud walls. Metal stud walls perform better than wood stud walls. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings.

Performance ratings of specific assemblies in the field. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. To view different wall assemblies click on each point below that may apply to your project. To achieve maximum sound isolation from an assembly follow published construction details completely.