On Day 15, the framing phase begins, during which the structural skeleton of the building is assembled using wood or steel components. Workers erect walls, floors, and roof trusses according to architectural blueprints, ensuring alignment, plumb, and structural integrity. Framing creates the basic layout of rooms, doorways, and windows, forming the shape of the entire structure. Materials are cut and fastened with nails or screws, with attention paid to load distribution and code requirements. Trusses are carefully lifted and secured to provide roof support, while floor joists and subflooring are installed for stability. This stage requires skilled labor and precise measurements to avoid costly errors. Framing also allows for the integration of openings for future electrical, plumbing, and HVAC systems. Once complete, the structure becomes weather-tight, enabling progress on exterior finishes and interior systems. Framing transforms plans into a tangible, three-dimensional form, marking a major milestone in construction.