Pre-Engineered Buildings (PEBs) consist of key components such as Z-C purlins for supporting roof and wall panels, decking sheets as a base for concrete slabs, and anchor bolts for securing the structure to the foundation. Structural sag rods maintain purlin alignment, while ridge vents and turbo ventilators ensure proper ventilation. Sky light panels provide natural lighting, and heat insulation sheets regulate indoor temperatures. Wall and roofing claddings protect the structure and enhance its aesthetics, with steel framing serving as the primary structural support. These components together make PEBs efficient, durable, and cost-effective.