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Fire safety engineering requires a detailed understanding of fire behaviour and of its\udeffects on structures and people. Currently, advanced numerical codes for the prediction of the\udfire behaviour are available. However, they often require heavy calculations and long times. In\udthis context analytical solutions can be useful for a fast analysis of simplified schematizations.\udIt allows a more effective final utilization of the advanced fire codes. In this contribution, for a\udseparation wall exposed to a fire the temperature history is analysed of the unexposed wall\udsurface. Due to the limitations of the model, the temperature in the fire room changes stepwise,\udwith a final value typical of a post-flashover condition. Nevertheless, with an appropriate\udchoice of the heat transfer coefficient, the thermal action on the surface exposed to fire\udbecomes that due to a fire following the standard temperature-time curve. The solution is then\udobtained by applying the separation of variables to the heat conduction equation. The problem\udis made dimensionless and the results are analysed in order to validate their significance. This\udsimplified model allows to obtain useful information on the magnitude of the temperature\udreached

Transient Heat Conduction in a Wall Exposed to a Fire: an Analytic Approach