- Author
- Nightingale, T. R. T. | Halliwell, R. E. | Quirt, J. D. | King, F.
- Title
- Transmission at the Wall/Floor Junction in Multifamily Dwellings: Quantification and Methods of Suppression.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Report
- IRC-RR-168; Research Report IRC-RR-168; RR-168, March 2005, 401 p.
- Keywords
- multifamily housing | transmission | walls | floors | fire suppression | wooden structures | construction | structural elements | partitions | floor coverings
- Identifiers
- flanking transmission in wood framed construction; continuous structural elements which pass under the partition wall separating two multifamily dewllings
- Abstract
- The primary focus of this project is flanking transmission in wood framed construction caused by the junction of a partition wall and floor that had continuous structural elements which pass under the partition wall separating two multifamily dwellings. This report is the integration of two phases where the focus and construction details were decided by a Steering Committee formed from technical representatives from each of the supporting partners. Partners included Forintek Canada Corporation, Marriott International, National Research Council Canada, Owens Corning, Trus Joist, and USG Corporation. Canada Mortgage and Housing Corporation participated only in the first phase. Flanking transmission is sound transmission between two rooms by paths other than directly through the nominally separating wall or floor assembly. Flanking exists in all buildings and its importance in determining the apparent sound insulation (that perceived by the occupants) will be a function of the construction details of the walls, floors and their junctions. The power transmitted by a flanking path is determined by five factors. Construction details investigated in this project changed one or more of the five factors: 1. Power injected into the flanking surface by an airborne or impact source; 2. Power attenuation from point of power injection to the flanking junction; 3. Power attenuation through the junction; 4. Power attenuation between the junction and the radiation point; 5. Conversion from structure borne power to sound power in the receiver room.