Case study about composite design in pre-engineered buildings (PEBs). It highlights the use of composite materials like steel and concrete to optimize structural performance, reduce cost, and increase efficiency in construction. PEBs are factory-built structures assembled on-site, offering benefits such as reduced construction time, lower costs, and high flexibility. The text explains that composite design integrates two or more materials in a way that they work together as a single structural unit, with each material offering specific mechanical properties that enhance the overall strength and durability of the structure.