Lecture
This lecture covers the analysis of trusses with seven and nine nodes, demonstrating a systematic approach to solving them, obtaining efforts, and comparing them to arch-and-cable structures. The instructor verifies the isostatic nature of the trusses, resolves them step by step, and illustrates the process graphically. The lecture also explores the addition of nodes and bars to maintain isostatic equilibrium, highlighting the importance of certain elements in supporting the structure's stability and load distribution.