Fire design methods for timber floor elements - The contribution of screed floor toppings to the fire resistance

Within the German research project F-REI 90 the existing analytical calculation method for assessing the fire resistance of timber frame assemblies and solid timber constructions will be improved and further developed. This paper describes a series of small-scale fire tests and the associated parametric finite element analyses of different configurations of floor constructions. This was done to determine the contribution of different layers, such as screed or sound insulation to the fire resistance of loadbearing timber floor elements. An analytical approach to consider the contribution of these layers in the fire resistance assessment was developed. The results can be used as input parameters assesing the separating function in the current revision of EN 1995-1-2.