ACI-318-25 sets new standard for structural concrete

Source: American Concrete Institute, Farmington Hills, Mich.

The latest version of the American Concrete Institute’s flagship document builds on a predecessor version with significant updates, including a new sustainability appendix that reflects modern construction practices, revised requirements for post-installed reinforcing bars, and enhanced provisions for shear friction. Additional updates in ACI 318-2025: Building Code for Structural Concrete – Code Requirements and Commentary include improvements to deep foundation requirements across all seismic design categories plus clarified guidelines for cantilever and basement wall shear design. 

ACI 318-25 is the definitive resource for the materials, design, and detailing requirements of structural concrete buildings and nonbuilding structures. Developed through an extensive consensus process, it addresses all major structural methods, including cast-in-place, precast, shotcrete, plain, prestressed and composite. The code also features numerous advancements in seismic design provisions, the addition of a performance-based wind design appendix, and modifications to development length equations. Enhanced language on the development, embedment, and anchorage of reinforcement, as well as new strength reduction factors for breakout failure, are also included, along with updated guidance for developing closely spaced bars in tension.

Designed for adoption by reference in general building codes, ACI 318-25 allows seamless integration without altering its language. The accompanying Commentary continues to provide detailed explanations and recommendations to facilitate application of the Code’s provisions. The new edition is available to ACI 318 PLUS platform subscribers and will be offered for purchase in print and digital formats through the ACI Store in early spring.  —  www. concrete.org/ACI318PLUS