This report describes progress achieved in 1993/94. It had been anticipated that those parts of this research program concerned with interior walls would be completed by March 31, 1994. Because NRC carried out more fire tests than required by the collaborative research agreements with the various "Partners", they were not able to submit a final report for the fire tests by March 31. That report will be available in May. The sound transmission tests were completed by December 31,1993. The last fire test was carried out on February 28,1994. The final report for the sound-transmission tests was submitted to the "Partners" on February 23, 1994.