Precast Floor Assembly Sound Ratings

Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.

Precast floor assembly sound ratings.

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. Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c gypsum wallboard or densarmor plus fireguard c panels each side of assembly and 3 1 2 89 mm fiberglass insulation in stud space both sides. 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.

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. Walls and both airborne and impact sound insulation for floor ceiling assemblies. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b. This catalog of sound rated wall and the purpose of the indexing system is.

Sound transmission measurement of the ability of a wall or floor assembly to isolate airborne sound and prevent it from passing from one class stc side to the other. Flanking of sound through a floor ceiling assembly can reduce stc or iic ratings 10 points or more.