Concrete Floor Stc Ratings

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.

Concrete floor stc ratings. Riverbank acoustical laboratory ral test number tl01 220. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. Stc iic ratings for fc 214 floor covering stc iic test number carpet pad 48 54 nrc 1059 1060 vinyl 47 35 nrc 1063 1064 lightweight concrete carpet pad 56 72 nrc 1053 1054 lightweight concrete and vinyl 56 48 nrc 1051 1052 gypcrete carpet pad 52 63 nrc 1076 1077 gypcrete 53 43 nrc 1085 1086 stc iic ratings for ul l528.

Fill 1 hr note. With no additional sound isolation system a 6 inch concrete slab has an stc of 53 and an iic of 27 so treatment of at least the impact noise is necessary to meet code. Insulation is not required if ceiling is 1 2 type x gyp. Stc ratings for wall floor and window materials and assemblies 3 appendix a stc ratings a 1 walls a 1 exterior a 1 interior a 9 wooden studs a 9 metal studs a 14 floors a 16 wood a 16 concrete a 21 windows a 24 doors a 27 exterior a 27 interior a 29 appendix b references b 1.

On resilient channels 2. Relativity stiff and massive concrete floors still can have poor less than code impact ratings. Determining sound transmission class stc for concrete masonry. This catalog of sound rated wall and the purpose of the indexing system is.

The sound transmission class stc is the rating of airborne sound transmission. Standard sound rated floor ceiling assemblies stc 50 iic 50 fire rating as shown 3. Iic 40 cad drawing composite slab of 3 thick concrete steel deck and steel joists with rsic 1 and double layer 5 8 gypsum board ceiling note. All ratings are not equal as with any underlayment sound testing number that a company gives you each subfloor or floor assembly in your home.

The quietwalk underlayment provides very high ratings such as iic of 71 and stc 66 as of mid 2018. On top of that the manufacture of the floor covering can use different materials. No insulation no floor covering where used. Double wood floor 1 hr.

The stc of a floor ceiling or wall structure is a measure of the decibel difference between the airborne sound energy striking one side of the structure and the sound energy radiated into a receiving room on the other side.