Lecture
This lecture covers the analysis of torsional stresses and internal forces in metal structures, focusing on closed and open sections under different loading conditions. It discusses the determination of non-uniform torsional stresses and shear stresses, as well as the interaction of forces in prismatic sections. The instructor explains the resistance and stability verification methods, referencing standard formulas and examples. Additionally, the lecture addresses the elastic and plastic calculations of elements, emphasizing the design levels of resistance. Various diagrams and examples are used to illustrate the concepts throughout the presentation.