Estimated stc ratings for cmu walls wall thickness in.
Stc concrete block wall.
A wall floor or roof.
8 concrete block hollow core painted 2 coats 2 sides.
Typical wall construction with 1 layer of 16mm 5 8 plasterboard on each side of 95x35mm 4 x 11 2 timber studs.
A stc rating of 55 is required for inter tenancy walls.
Stc ratings for masonry cmu walls is based on weight of the block and whether the cells are filled or not and what material it is filled with.
The higher the rating the greater the degree of noise reduction.
Many sound transmission loss tests have been per formed on various concrete masonry walls.
8 concrete block wall painted with 1 2 drywall on independent steel stud walls each side insulation in cavities stc prediction edit there are several commercially available software which predict the stc ratings of partitions using a combination of theoretical models and empirically derived lab data.
Sound transmission class stc provides an estimate of the acoustic performance of a wall in certain common airborne sound insulation applications the stc of a wall is determined by comparing sound transmission loss stl values at various frequencies to a standard contour stl is the decrease or attenuation in sound energy in db.
Standard stud wall with one layer of 16mm 5 8 plasterboard.
8 concrete block hollow core no wall finish.
Within a dwelling an internal wall with a stc rating of 45 will usually muffle television telephone ringing and conversation in an adjoining room.
Determining sound transmission class stc for concrete masonry.