Greenwood Engineering
Charles S. Greenwood P.E. is a globally recognized key engineer to the structural analysis, design, engineering and installation of modern tree house design. With over 30 years of treehouse specific engineering analysis and design, Charley, as he is known by everyone, is the founder of the engineering movement of modern treehouse design and continues to engineer stronger and more tree-friendly support systems to this day. Treehouseengineering.com