ACI CODE 318-25 PDF

Full title and description

ACI CODE-318-25: Building Code for Structural Concrete — Code Requirements and Commentary. The 2025 edition of ACI 318 is the American Concrete Institute’s primary standard for the materials, design, detailing, and construction requirements for structural concrete in buildings and nonbuilding structures; it includes side‑by‑side commentary to aid interpretation and application.

Abstract

ACI CODE-318-25 (2025 edition) supersedes the previous edition and consolidates updated provisions covering cast‑in‑place, precast, shotcrete, plain, non‑prestressed, prestressed, and composite concrete construction. Key 2025 additions include a sustainability appendix, revised rules for post‑installed reinforcing bars and shear friction, expanded seismic and foundation guidance, and a new performance‑based wind design appendix; the edition is available through the ACI 318 PLUS digital platform and in printed and PDF formats.

General information

• Status: Current (published edition / in force as ACI’s 2025 code).
• Publication date: Approved by the ACI Standards Board January 2025; published and released to ACI 318 PLUS and in print/PDF during spring–summer 2025.
• Publisher: American Concrete Institute (ACI).
• ICS / categories: Concrete structures / construction materials (ICS codes commonly used for concrete standards such as 91.080.40 / 91.100.30).
• Edition / version: ACI CODE-318-25 (2025 edition).
• Number of pages: Approximately 700–720 pages depending on unit system/format (the SI and inch‑pound versions and printed/PDF releases are ~700+ pages).

Scope

Provides code requirements and explanatory commentary for the design and construction of structural concrete elements in buildings and nonbuilding structures. The code addresses material properties, strength and serviceability design, reinforcement development and anchorage, shear (including one‑way shear and shear friction), flexure, torsion, slab and footing design, deep and shallow foundations, seismic detailing and capacity, prestressing and post‑tensioning, durability, and special provisions for precast and shotcrete systems. The 2025 edition also adds appendices on sustainability and performance‑based wind design.

Key topics and requirements

• Material and strength requirements for normal and special concrete, reinforcement, and prestressing tendons.
• Updated development length, embedment, and anchorage provisions (including guidance for closely spaced bars and post‑installed reinforcing bars).
• Revised one‑way and two‑way shear provisions and expanded shear friction rules.
• Enhanced seismic design and detailing provisions across seismic design categories.
• Improved deep foundation requirements and clarified guidance for cantilever and basement wall shear design.
• New sustainability appendix addressing material selection and resilient practice considerations.
• Performance‑based wind design appendix and refinements to strength‑reduction factors (including breakout failure considerations).
• Side‑by‑side Commentary providing background, rationale, calculations, and application examples to support the Code provisions.

Typical use and users

Primary users are structural engineers, detailing and design professionals, geotechnical and foundation engineers, contractors, construction managers, code officials and plan reviewers, academic instructors, and students. The Code is used for producing contract documents, compliance verification in jurisdictions that adopt ACI by reference, design checks, and educational/reference purposes.

Related standards

Closely related documents include the ACI Detailing Manual, the ACI Reinforced Concrete Design Handbook, ACI/ASCE/SEI consensus standards referenced by ACI 318 (for example standards on anchors, materials, testing, and durability), and companion ACI specifications for precast/prestressed concrete (e.g., ACI/PCI documents). ACI 318 is commonly referenced by model building codes and by other standards covering testing, anchors, and materials.

Keywords

concrete design; structural concrete; reinforcement; ACI 318; shear friction; development length; anchorage; seismic detailing; foundations; sustainability; performance‑based wind design; code and commentary.

FAQ

Q: What is this standard?

A: ACI CODE-318-25 is the American Concrete Institute’s 2025 edition of the Building Code for Structural Concrete — a combined code and commentary that sets minimum requirements for the design and construction of structural concrete in buildings and nonbuilding structures.

Q: What does it cover?

A: It covers materials, strength and serviceability design, reinforcement detailing and anchorage, shear and flexure provisions, prestressing, foundations, seismic detailing, durability, and related topics, plus new 2025 appendices on sustainability and performance‑based wind design. The Commentary explains intent, background and application.

Q: Who typically uses it?

A: Structural engineers, designers, contractors, code officials, and educators use ACI 318 for design, plan review, specification writing, and teaching; it’s also used where jurisdictions adopt ACI provisions by reference.

Q: Is it current or superseded?

A: ACI CODE-318-25 is the current (2025) edition of ACI 318 and supersedes the prior (2019) edition for new projects that specify the 2025 code; users should confirm the edition required by the project owner or local authority having jurisdiction.

Q: Is it part of a series?

A: Yes — ACI 318 is the flagship code in a family of ACI standards and is supported by companion publications such as the ACI Detailing Manual, Reinforced Concrete Design Handbook, and related ACI committee reports and practice documents.

Q: What are the key keywords?

A: Structural concrete, reinforcement, anchorage, development length, shear, seismic, foundations, sustainability, ACI 318, code and commentary.