Stc 50 Wall Types

Insulation will noticeably improve the stc rating of an assembly.

Stc 50 wall types.

Stc ratings steel stud framed walls sound transmission class stc is an integer rating of how well a framed wall attenuates sound. With 1 25 mm type s 12 drywall screws 12 305 mm o c. 5 8 15 9 mm toughrock fireguard x or 5 8. The most common single rating search for across the internet is stc 50.

One layer type x two layers one two none 42 nr 5 8 one layer 5 8 type x two layers one two none 47 1 hr. Staggered or double stud walls are higher rated than single stud walls. The stc rating of a cmu wall can be estimated based on its weight using the following formula. 5 8 type x one layer one side 3 4 fiberglass batt 50 1 hr.

Stc 0 18w 40 where w pounds per square foot psf this information is provided as a tool to help estimate. No insulation 50 with insulation 54 staggered stud wall construction with 3 layers of 16mm 5 8 plasterboard on studs of 95x35mm 4 x 11 2 on a 120mm 4 3 4 common base. 5 8 15 9 mm toughrock fireguard x or 5 8 15 9 mm densarmor plus fireguard gypsum panels applied vertically to each side of 3 1 2 89 mm 20 gauge 33 mils steel studs 24 610 mm o c. That is because it is one of the few stc or sound transmission classification ratings that are mandated by building code.

Metal stud walls perform better than wood stud walls. The estimate could easily be off by as much as 4 db.