To calculate the maximum bending moments and stress for a see-saw design, it's essential to identify where these maximum values occur, typically at the supports or load points. The user seeks assistance in determining the maximum bending moment and stress to inform the weight of the beam needed for structural integrity. Providing initial calculations or attempts is necessary for others to offer targeted help. Understanding the load distribution and support reactions will also aid in accurately assessing the required beam specifications. Accurate calculations are crucial for ensuring the design can withstand the anticipated stresses.