Stair Design Layout Plan CAD Drawing with Tread and Riser Sections

This Detailed Stair Design Layout Plan CAD Drawing is a professional AutoCAD DWG file showing a cross-sectional view of a staircase with accurate dimensional details. The drawing includes main reinforcement, distribution reinforcement, concrete beam (zuncho), tread covering, and plaster finish with millimeter measurements. Each element is annotated for precise fabrication, installation, and structural integrity. This CAD drawing is ideal for architects, civil engineers, and builders who require professional stair layout documentation for residential or commercial projects.