Fire Dynamics Simulation (FDS) is commonly used computational fluid dynamics (CFD) based fire model in research and practical engineering applications. Various thermo-physical material properties and chemical kinetics values are needed as the input parameters. To account for variation of some of the property values with respect to temperature; RAMP and tabular functions are used. This paper identifies additional properties whose variation in heating rate and radiation flux can be implemented using new RAMP and tabular functions.