The paper discusses and highlights the basic challenges in the structural design of a 70-meter river floating passenger terminal. It is designed as a multi-deck floating object characterized by a large superstructure with a specific shape, equipped with solar and glass panels and the absence of transverse/longitudinal bulkheads. The height of the superstructure is larger compared to the height of the lower hull and its influence on longitudinal strength should be considered in the very early design phase. Croatian Register of Shipping (CRS) Rules for the Classification of Inland Navigation Vessels Part 2 – HULL AND HULL EQUIPMENT, July 2021 were used to define design loads, corrosion deductions, safety factors, etc. The main results and challenges have been briefly presented for the preliminary design phase where global structural response has been evaluated based on the full-ship FE model. Feasibility structural calculation due to yielding and buckling issues has been performed following criteria given in CRS Rules and a feasible design solution has been proposed.