https://www.homebuildingandrepairs.co... Click on this link for more information about new home construction, old house building and floor joists cantilevered framing systems. In this video I will provide you with two problems that could prevent you from attaching a deck, balcony or patio cover to an extended floor joist framed cantilever on an existing house. Structural engineering might also be required for remodeling, renovation and even new house construction projects, along with consulting local building authorities and building departments.