Various studies have elucidated the failure mechanisms of reinforced concrete structural systems subjected to diverse thermal conditions. In a parallel manner, various methodologies have emerged to enhance the concrete's fire resistance, focusing on the choice of materials and the intricacies of design. In the exploration of fire dynamics within full-scale reinforced concrete structures, three pivotal elements emerge for consideration: the influence of applied loads, the spatial positioning of the fire, its intensity and temporal extent, alongside the responsiveness of structural components to the specific site and nature of the fire's application. To assess the interplay between load and elevated temperature, a finite element method is conducted, necessitating the identification of the critical point of the beam element across varying X/L ratios. The investigation into the transient state reveals that upon uniform heating of the entire span, the threshold temperature for failure is established at 856 °C within 124 min. The transient state analysis reveals that the stiffness of the beam element at Immediate Occupancy (IO) attains a value of 16.38kN/mm. At the same time, Life Safety (LS) measures 11.00kN/mm at the specified parameters of X/L = 0 and a = 3000 mm.