The 2" x 4" x 8' Header or Footer is an essential piece of Spruce-Pine-Fir (SPF) lumber commonly used in construction projects for both structural support and stability. As a header, it spans the openings for doors and windows, providing crucial support above. Typically installed horizontally, headers are often doubled or tripled for added strength, depending on the load requirements. As a footer, this lumber serves as the base framework in wall construction, positioned horizontally at the bottom of walls to anchor wall studs securely.