ACI 350-20 errata 2025 PDF

Full title and description

St ACI 350-20 errata 2025 — Errata sheet for "Code Requirements for Environmental Engineering Concrete Structures (ACI 350-20)" and accompanying commentary (ACI 350R-20). The errata compiles authoritative corrections, clarifications, and small editorial fixes issued for the ACI 350-20 code document as of 2025.

Abstract

This product is an errata publication that records corrections and editorial clarifications to ACI 350-20 (the ACI code for environmental engineering concrete structures). It is intended to be used together with the base ACI 350-20 publication (Code and Commentary) to ensure users apply the most up-to-date wording and technical fixes published through 2025. The errata does not replace the Code; it amends specific clauses, tables, figures, or commentary notes as listed in the errata document.

General information

• Status: Active; errata issued / compiled for 2025 edition of the errata document.
• Publication date: Original ACI 350-20: October 2021; errata compilation date: 2025 (errata document date shown as 2025).
• Publisher: American Concrete Institute (ACI).
• ICS / categories: ICS 91.100 (Concrete); Categories: Codes, Environmental engineering concrete structures, Durability and tightness requirements.
• Edition / version: ACI 350-20 (first printing 2021) with errata compilation labeled 2025.
• Number of pages: ACI 350-20 main document: 544 pages; errata sheet length varies (typically a short PDF of corrections — usually a few pages).

Scope

ACI 350-20 provides code requirements and commentary for the design, materials selection, construction, and evaluation of environmental engineering concrete structures used to convey, store, or treat water, wastewater, other liquids, and solid wastes. Key scope elements include structural integrity, durability and exposure classification, concrete mixture limits for durability, joint and tightness requirements, reinforcement corrosion protection, and requirements for existing-structure evaluation. The 2025 errata documents corrections to specific text, tables, or figures within that scope to remove ambiguities or fix errors discovered after publication.

Key topics and requirements

• Durability and exposure classification (exposure classes, maximum w/cm ratios, minimum concrete strengths, required SCM content for sulfate/corrosion resistance).
• Tightness, gas- and liquid-sealing provisions (joint design, waterstops, tightness testing procedures and requirements).
• Concrete quality, mixture proportioning, placement, finishing and curing requirements for environmental structures.
• Reinforcement detailing, corrosion protection, and minimum cover requirements specific to aggressive environments.
• Design for loads specific to environmental structures (hydrostatic and hydrodynamic loads, soil and earth pressures, operational loads, and references to seismic provisions where applicable).
• Inspection, testing, and acceptance criteria (strength testing, sampling, and tightness testing specifications and procedures).
• Editorial and technical corrections recorded in the 2025 errata (updates to clause text, table entries, figure labels, and commentary clarifications).

Typical use and users

Primary users include licensed design professionals (structural/civil engineers) who design water and wastewater treatment and storage structures, specifiers, project owners, contractors, materials and laboratory personnel, construction and quality-control inspectors, and code compliance officials. The errata is used by these stakeholders to ensure that contract documents and design/inspection work reference the corrected wording of ACI 350-20.

Related standards

Commonly referenced and related ACI documents and standards include: ACI 350R-20 (commentary), ACI 350.3-20 (seismic design for liquid-containing structures), ACI 350.1 (tightness testing specifications), ACI 318 (building code requirements for structural concrete) where applicable, and other ACI guides/specifications referenced within ACI 350-20. Users should consult the ACI 350-20 referenced-standards list for the complete set.

Keywords

Environmental engineering concrete structures, ACI 350-20, errata 2025, durability, tightness testing, exposure classification, water/wastewater structures, concrete mix design, corrosion protection, joint design.

FAQ

Q: What is this standard?

A: ACI 350-20 is the American Concrete Institute code document titled "Code Requirements for Environmental Engineering Concrete Structures" (with accompanying commentary ACI 350R-20). The "St ACI 350-20 errata 2025" refers to the errata compilation that records corrections issued up to 2025.

Q: What does it cover?

A: It covers design, materials, construction, testing, and evaluation requirements specific to concrete structures used in environmental engineering: storage/treatment of water and wastewater, containment of liquids and solids, durability in aggressive exposures, and provisions for tightness and serviceability. The errata corrects and clarifies specific code text and commentary items.

Q: Who typically uses it?

A: Structural and civil engineers, specifiers, owners and operators of water/wastewater facilities, contractors, testing laboratories, and inspectors — anyone involved in the design, construction, or evaluation of environmental concrete structures.

Q: Is it current or superseded?

A: The base code ACI 350-20 was published in 2021 and remains the current edition in force; errata documents (including the 2025 errata compilation) provide post-publication corrections. Users should consult ACI’s official errata page and the published errata sheet(s) to confirm the latest corrections before applying the code. Errata do not supersede the code but amend specific items until a future revision is published.

Q: Is it part of a series?

A: Yes — ACI 350 is part of a family of ACI documents addressing environmental, containment, and liquid-containing concrete structures; related publications include ACI 350R-20 (commentary), ACI 350.1 (tightness testing), ACI 350.3 (seismic provisions for liquid-containing structures), and other ACI practice and specification documents referenced by the code.

Q: What are the key keywords?

A: Environmental engineering concrete structures; tightness; exposure class; durability; water/wastewater tanks; corrosion protection; concrete mix limits; joint design; errata 2025.