This project is a product of the merger of two continuing projects, namely “Fire Safety in Canadian Housing” and “Characterization of Fires in Residential Buildings”. The project formerly called “Fire Safety in Canadian Housing” included FPInnovations’ contribution to the National Research Council’s (NRC) consortium project looking at the effect of different fire protection measures on wood floor/ceiling assemblies on the life safety of occupants in single family houses. The current project is Phase Ib which is an extension of the original project which investigated the impact of different unprotected wood floor assemblies such as solid sawn joists, wood I-joists, wood trusses, etc. on the life safety of occupants. The project formerly called “Characterization of Fires in Residential Buildings” included FPInnovations’ contribution to the NRC’s consortium project looking at the development of design fires and design fire scenarios for residential buildings. Specifying design fires is an important step in a performance-based design. Since both of the research projects involve overseeing research conducted by the NRC dealing with fire in residential housing, they have been combined to allow simplified reporting.