Stc 50 Rated Wall Assembly

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.

Stc 50 rated wall assembly.

Moisture resistant assemblies aesthetic assemblies sa932 sa933 sheetrock gypsum panels submittal sheet wb1473 usg area separation walls. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. 50 stc with single layer designs have achieved up to 4 hr. An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.

Metal stud walls perform better than wood 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. 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.

Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 03. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. This is usu ally because there is a pronounced dip in the test curve and the stc rating is heavily influenced by a measurement in one fre quency band. Staggered or double stud walls are higher rated than single stud walls.

Performance ratings of specific assemblies in the field. 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. 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.

Fire resistance ratings with 3 4 ultracode core panels in steel framed partition assemblies for more information see the following brochures. To achieve maximum sound isolation from an assembly follow published construction details completely. Use non hardening acoustical sealant at penetrations and floor ceiling and wall intersections to prevent flanking paths for sound. To view different wall assemblies click on each point below that may apply to your project.