The European standards EN 199x, the so-called Eurocodes, permit for the dimensioning of structural elements in case of fire besides the conservative methods (prescriptive rules), alternative ways of solution. They are described by performance-based codes. The author Dietmar Bobacz developed tools to dimension wood members on basis of performance-based codes. A fire event in this connection is no longer determined by the standard temperature curve (STC) but individually derived for each fire scenario. This is the first step. The main part of this paper deals with the calculation of charring...