The present study is dedicated to the comprehensive analysis and optimization of castellated web beams featuring diverse shapes of web openings, such as circles, hexagons, and squares. The investigation involves systematically varying the dimensions of the web openings and the distances between them to discern their effects on the structural behaviour of the beams. To conduct this analysis, the study employs the renowned ABAQUS software, known for its advanced simulation capabilities in structural engineering. Castellated web beams, characterized by regularly spaced web openings, offer a structural advantage by achieving reduced weight while maintaining integrity. However, the specific shape and dimensions of these web openings significantly impact the overall performance of the beams. The primary objective of this study is to ascertain the optimal design parameters for castellated web beams, with a focus on enhancing their structural efficiency. The methodology involves utilizing ABAQUS software for finite element analysis, enabling precise modelling and simulation of critical aspects, including stress distribution, deformation behaviour, and the overall structural response of the castellated beams. Through this approach, the study aims to gain insights into the nuanced relationships between various design parameters and structural performance. The hypothesis put forth in the study suggests that by reducing the dimensions of the web opening and decreasing the distance between them, the load-carrying capacity of the beam can be enhanced. The research systematically manipulates these parameters with the ultimate goal of identifying optimal design configurations that maximize the structural performance of castellated web beams.