This National Research Council Canada (NRC) report was prepared for Steel Framing Alliance (SFA) to enhance A Guide to Fire and Acoustic Data for Steel Floor, Wall and Roof Assemblies with more acoustic data. The objective of the work was to provide sound transmission class (STC) and impact insulation class (IIC) ratings for a number of walls and floors listed in the SFA guide since not all of the fire rated designs had sound ratings assigned. The work involved a review of published acoustical ratings, some quite old, and provision of estimates where no reliable test ratings were available. The body of the report describes the procedures used to analyze the available laboratory test data (17 pages). The remainder of the report (pages 18 to 48) provides the estimated or measured sound ratings (with acoustic test identifier, i.e., testing agency) for the fire rated assemblies that were included in the October 2005 edition of the SFA guide. The report’s acoustic