Precast Floor Assembly Sound Ratings

This catalog of sound rated wall and the purpose of the indexing system is.

Precast floor assembly sound ratings.

Weather and sound 3 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. Isolation pads control flanking noise in ceiling floor and walls. Transmission the passage of sound waves from its source through a vibrating medium and to a listener. Flanking of sound through a floor ceiling assembly can reduce stc or iic ratings 10 points or more.

Party walls must have a minimum nic rating of 50. Floor ceiling assemblies between units must have a minimum nic and fiic rating of 50. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. 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.

Partitions and floor ceiling assemblies constructed in accordance with the diagrams shown herein are considered to have sound transmission class stc ratings and impact insulation class iic ratings of 50 as shown. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.