This chapter presents a comprehensive treatment of the prediction and interpretation of wall loads in bins and silos, with emphasis on the strong dependence of loads on flow pattern, geometry, and material properties. Classical theories underpinning silo design are reviewed, beginning with Janssen’s formulation for static storage and extending to modern interpretations of loading during discharge. Detailed discussion is provided for mass flow bins, including cylinder and hopper stress fields, surcharge effects, pressure ratios, and over pressure factors arising from wall imperfections. The horizontal slice model is introduced as a practical framework for hopper load analysis under both initial filling and flow conditions. Funnel flow bins, eccentric and multi outlet discharge configurations, and their propensity to induce severe non uniform pressures and bending stresses are examined through theory and case studies. The influence of temperature and moisture variations on wall pressures is highlighted, together with design and operational consequences. Methods for mitigating excessive loads, including the use of anti dynamic devices, are outlined. Throughout, the chapter links fundamental mechanics with design codes and field experience, reinforcing the importance of classical principles in safe and reliable bin and silo design.