During a fireFire, structural elements such as beams are often exposed to complex thermal conditions that can significantly impact their integrity and performance. In many real-world scenarios, beams are subjected to fire from multiple sides, leading to a two-dimensionalTwo-dimensional or notional charringCharring effect. Unlike one-dimensional charring, which occurs when fire exposureFire exposure is limited to a single surface, two-dimensional charring affects multiple surfaces simultaneously, resulting in a more intricate heatHeat transferHeat transfer process and structural response.