This study addresses a structural design challenge in the pump room of a slurry placing barge constructed in Batam. The research focuses on analyzing and optimizing the pump room’s structure following the removal of diagonal stanchions, which were found to impede accessibility. Using Finite Element Method (FEM) analysis, two models were evaluated: a base model with diagonal stanchions and a variant with modified web frames. The study employed comprehensive methodologies, including literature review, data collection, sectional modulus calculations, 3D modeling, and both analytic and FEM analyses. Results show that both designs comply with Indonesian Classification Bureau (BKI) standards. The base model exhibited a maximum stress of 23,103 MPa with a safety factor of 7,39; while the modified design showed 22,798 MPa and 6,64 respectively. The web frame modification proved to be an effective alternative, balancing structural integrity with improved accessibility. The research concludes that the modified design without diagonal stanchions is a viable solution, offering enhanced operational efficiency without compromising structural safety. This study contributes to the optimization of maritime vessel design, particularly in improving pump room functionality in specialized ships like slurry placing barges.