The Post-Tensioning Institute (PTI) is an American nonprofit organization committed to advancing the quality, safety, efficiency, profitability, and use of post-tensioning systems.
PTI's manuals and technical guides are designed to provide guidance on the design, construction, maintenance, and repair/rehabilitation of post-tensioned concrete structures.
In addition , PTI aims to ensure that specifiers and purchasers of post-tensioning materials receive best products and services that meet a standard of quality through its plant and field personnel certification programs.
Members of the Institute include major post-tensioning materials fabricators.
Additionally, members include professional engineers, architects and contractors.