This lecture covers the properties, assembly, mechanical strength, and deformations of structures, focusing on a specific exercise involving thermal conductivity. The exercise presents a scenario with an aluminum flange connected to an aluminum structure using stainless steel bolts and a Kapton insulator sheet. The lecture discusses thermal conductivities, thermal conductance, and temperatures of the structures, leading to questions about thermal power transfer and the contribution of different components. It also delves into the numerical solutions and calculations related to the thermal transfer through bolts and the entire system.