Stc Ratings Concrete Wall 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.

Stc ratings concrete wall assemblies.

3 5 8 metal studs 5 8 gyp 2 layers total no insulation. Staggered or double stud walls are higher rated than single stud walls. Stc 0 18w 40 where w pounds per square foot psf this information is provided as a tool to help estimate. A wide variety of stc ratings is available with concrete masonry construction depending on wall weight wall construction and finishes.

The sound transmission class stc is a single number rating of a material s or an assembly s ability to resist airborne sound transfer at the frequencies 125 4000 hz. Standard method for determining sound transmission ratings for masonry walls tms 0302 ref. 3 5 8 metal studs 5 8 gyp 2 layers total batt insulation. Stc is highly dependant on the construction of the partition.

In the absence of test data standard calculation methods exist which tend to be conservative. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. 1 contains procedures for determining stc values of.