Stc Floor Rating Chart

5 or 6 points in laboratory stc ratings for essentially similar assemblies.

Stc floor rating chart.

Iic impact isolation class astm e492 e989 and stc sound transmission class astm e336 e413 are both tests for sound traveling through the total floor ceiling assembly from an upper living area to a lower living area. Sound transmission class or stc is an integer rating of how well a building partition attenuates airborne sound. 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. Sound transmission class stc a commonly used measure of soundproofing effectiveness is the sound transmission class or stc it is a single number that attempts to characterize the overall ability of a material to reduce the transmission of noise.

Sound transmission class stc is an integer rating of how well a building partition attenuates airborne sound in the usa it is widely used to rate interior partitions ceilings and floors doors windows and exterior wall configurations see astm international classification e413 and e90. Impact sound complaints are common on floor ceiling assemblies that meet the bare minimum requirement of 50 decibels iic. Stc is determined by a weighted average of tl values taken over 16 frequencies which are fitted to a curve in a method defined by the astm e413 classification standard for rating sound insulation. In the us it is widely used to rate interior partitions ceilings floors doors windows and exterior wall configurations.