Stc ratings for load bearing walls.
Stc 50 wall assembly metal studs.
Note that in the low frequency range important for music theaters traffic aircraft and most other real world noise sources the lower stc wall is literally 30 decibels better yet lower stc.
Target stcs by building use.
We see two walls.
Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound.
Fire resistance ratings with 3 4 ultracode core panels in steel framed partition assemblies for more information see the following brochures.
How to improve stc ratings in your wall.
Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.
Doubling the mass of a wall assembly does not double the stc rating.
Moisture resistant assemblies aesthetic assemblies sa932 sa933 sheetrock gypsum panels submittal sheet wb1473 usg area separation walls.
Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c gypsum wallboard or densarmor plus fireguard c panels each side of assembly and 3 1 2 89 mm fiberglass insulation in stud space both sides.
Metal stud walls perform better than wood stud walls.
Staggered or double stud walls are higher rated than single stud walls.
International building code requires 50 stc between adjacent dwelling units.
Common wall stcs by construction type.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.
Stc sound transmission classification overview.
Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c gypsum wallboard or densarmor plus fireguard c panels each side of assembly and 3 1 2 89 mm fiberglass insulation in stud space both sides.
An empty framed wall steel studs and a layer of gypsum wallboard on each side has an stc of approximately 35.
Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 04.
50 stc with single layer designs have achieved up to 4 hr.
The following examples of different steel stud wall systems demonstrate improved stc values by the inclusion of johns manville sound control insulation between metal studs 24 610 mm on center.
Breakaway clip facings and height of wall differ between ul design u373 and whi gp wa 120 04.
One has an stc 47 4 solid concrete the other an stc 48 steel stud wall.
