In this study the problem of evaluation the temperature of a protected steel element exposed to fire according EN 1991-1-2 and EN 1993-1-2 is considered. A macros for MS Excel is developed for this purpose. The input data are :  the section factor of the element-A p /V;  the specific heat of the insulation-c p ;  the thickness of the insulation material-d p ;  the thermal conductivity of the fire protection material-l p ;  the design fire load density-q f,d ;  opening factor-O;  the

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... al properties of fire sector enclosure-b The obtained results are presented in graphical and a tabular form. A proposition for a smoother transition between fuel controlled and ventilation controlled cases is made