It is necessary for fire safety that in case of a flashover situation, the windows in the outer skin would break very fast and before the windows in the inner fa?ade would break, so that the model of Law is valid in which case the NEN 6068 could be applied. The wind blows towards the building for a worstcase situation. Computational Fluid Dynamics (2D) is used for calculating convective heat transfers assuming a specific heat source for the fire. WINFIRE is used for the predicting of radiation. Due to convection and radiation the temperature in the windows would rise and the window will eventually break. As a result we predicted that the obstructed outer skin would break within 10 seconds and a non-obstructing flashover situation will be left. Hence, the NEN 6068 can be applied.
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