During the 2025 World of Concrete trade show, the Post-Tensioning Institute (PTI) teamed up with the American Concrete Institute to put together an updated set of post-tensioned structural concrete building code requirements — ACI-PTI 320-25, Building Code Requirements for Post-Tensioned Structural Concrete.
“This is the first ever version of this new code, created and established jointly by PTI and ACI to cover the specifics of post-tensioned concrete structures,” said Tim Christle, executive vice president of PTI.
The code was updated to better provide information and solutions to increase consistency, safety, and durability, and hold a standard for construction best practices. This protocol is intended to help the industry keep a shared understanding of how designing and executing post-tensioned structural concrete should be.
In addition to the updated code, PTI also shared its new certification program that targets certifying and testing multistrand and bar post-tensioning systems (PTS). The PTI's new program aligns with the PTI/ASBI M50.3 specification, which is a commonly accepted standard. When certified through the program, post-tensioning systems are registered to the PTI website — this allows for the incorporation of the system into projects without going through a respective pre-qualification process.
Christle said, “This program directly enhances the quality and durability of post-tensioned concrete structures utilizing these systems.” In addition, he said that owners can “confidently use these systems on their structures, instead of maintaining their own individual pre-qualification processes.”
The new certification program and the soon-to-be-released post-tensioned structural concrete code are expected to improve post-tensioning standards and structural reliability, durability, and efficiency.
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