The Truss Plate Institute (TPI ®) opened in 1961 to address the emerging market for metal plate connected wood trusses. We continue to serve that market and are fulfilling our mission "....to maintain the truss industry on a sound engineering basis..." through our ongoing development of TPI ® guidelines and standards and other activities. Metal plate connected wood trusses provide safe, efficient and reliable engineered structural components which provide viable engineered building solutions necessary for today’s building industry. TPI ® is and will continue to provide services, products, guidelines, and standards to support and advance the industry. Visit other areas of our website to learn more about TPI ®.