The structural system of the subshell roof has undergone a fascinating evolution inspired by the intricate design of sunflower stems and leaves. Drawing inspiration from nature's ingenuity, architects and engineers have integrated the sunflower's biomechanics into their designs, resulting in a remarkable synergy between organic forms and architectural innovation. Mimicking the sunflower's strong yet flexible stem, the subshell roof incorporates a network of interconnected beams and supports that distribute loads efficiently while accommodating dynamic stresses. The leaf's spiral pattern, known as the Fibonacci sequence, has guided the arrangement of elements, optimizing material usage and enhancing structural resilience. This biomimetic approach not only enhances the subshell roof's load-bearing capacity but also reflects a harmonious blend of sustainable engineering and organic aesthetics, ultimately pushing the boundaries of structural design.