This is a 3D CAD sectional view of a post-mounted railing system, commonly used in balconies, decks, terraces, and stairways. The model features a structural aluminum post anchored into a concrete footing, supporting a horizontal top rail extrusion and glass infill panels. The top cap is shown fastened with mechanical hardware for easy installation and modular adjustment. This design provides a sleek, modern aesthetic while maintaining durability and safety in both residential and commercial applications.