This lecture covers the transmission of shear force alone through slender spacers in lesson 8, followed by the design considerations for concrete bridges, including walls of minors, support, and works in lesson 9. The instructor discusses the importance of careful geometry, unity of materials, and different masonry techniques for the design of concrete structures. The lecture also delves into the choice of static systems, reinforcement placement, and stress limitation criteria for fixed bridges, emphasizing the need for integrated solutions and crack control in the design process.