ACI CODE 440.11-22 (SI Units) PDF

Full title and description

ACI CODE-440.11-22 (SI Units) — Building Code Requirements for Structural Concrete Reinforced with Glass Fiber‑Reinforced Polymer (GFRP) Bars — Code and Commentary. This SI‑units edition contains requirements, commentary, and examples for the design, detailing, material qualification, inspection, and construction of structural concrete using solid, round GFRP reinforcing bars in SI units.

Abstract

ACI CODE-440.11-22 establishes minimum code requirements for the use of solid, round glass fiber‑reinforced polymer (GFRP) bars in structural concrete, covering materials, design for strength and serviceability, load combinations and factors, deflection limits, development and splicing of reinforcement, construction documents, field inspection and testing, and evaluation of existing structures. The Code is written as a dependent code to the ACI 318 family and is provided with explanatory commentary. The SI edition provides all provisions in SI units.

General information

• Status: Published / Active (first edition).
• Publication date: SI edition published 03/01/2023 (the original inch‑pound edition was released 09/01/2022).
• Publisher: American Concrete Institute (ACI).
• ICS / categories: Construction materials and structures — commonly classified under ICS 91.100 (Concrete and concrete products) and related ICS 91.080 (Concrete structures).
• Edition / version: 1st edition (ACI CODE‑440.11‑22), SI edition.
• Number of pages: 259 pages (SI edition).

Scope

The Code applies to buildings and, where applicable, non‑building structures reinforced with solid, round GFRP bars that meet the material requirements of ASTM D7957 (SI or inch‑pound versions). It provides minimum requirements for materials, design, detailing, construction, inspection, testing, and evaluation of members and connections (cast‑in‑place, precast, non‑prestressed, and composite construction). The Code limits the type of FRP covered (solid, round GFRP bars per ASTM D7957) and places restrictions on use in seismic design categories (per Code provisions) to reflect available research and practice. ACI CODE‑440.11 is written as a dependent code to ACI 318 (the main building concrete code) for interpretation and supplemental rules.

Key topics and requirements

• Material qualification and properties for GFRP bars (conformance to ASTM D7957 family of specifications; mechanical, geometric, and durability tests).
• Design provisions for strength and serviceability (load combinations, strength reduction factors, serviceability limits, and deflection control).
• Rules for development length, splicing, anchorage, and composite behavior when steel is present but not counted for strength.
• Durability, fire‑related considerations, and guidance on environmental effects specific to nonmetallic reinforcement (commentary material provides background).
• Construction documentation, field inspection, and testing requirements for acceptance of GFRP‑reinforced concrete.
• Limitations on use in higher seismic design categories and guidance on intended building applications (to reflect current knowledge of seismic performance).

Typical use and users

Primary users are structural engineers, design professionals, code officials, precast and cast‑in‑place concrete producers, material suppliers, and contractors involved in projects where corrosion resistance or non‑magnetic/non‑conductive reinforcement is required (e.g., marine structures, parking structures, chemically aggressive environments, electromagnetic‑sensitive facilities). The Code is used to produce compliant contract documents, perform design calculations, and guide inspection/testing for GFRP‑reinforced concrete. Educational and training programs (including ACI courses and companion handbooks) support adoption.

Related standards

Key referenced and companion documents include ACI 318 (Building Code Requirements for Structural Concrete — the dependent code family), ASTM D7957/D7957M (specification for solid round GFRP bars), ACI MNL‑7 (GFRP‑Reinforced Concrete Design Handbook: companion examples and guidance), and other ACI Committee 440 publications and FRP guidance documents. The Code is intended to be used together with these product, material, and design standards.

Keywords

GFRP, FRP, glass fiber‑reinforced polymer, nonmetallic reinforcement, reinforcement bars, GFRP bars, ASTM D7957, ACI CODE‑440.11‑22, SI units, concrete design, development length, splicing, durability, serviceability, ACI 318, building code.

FAQ

Q: What is this standard?

A: ACI CODE‑440.11‑22 (SI) is the ACI building code document containing code provisions and commentary for the use of solid, round glass fiber‑reinforced polymer (GFRP) bars as reinforcement in structural concrete, provided in SI units. It is a code‑level document intended for adoption or reference by building codes and design professionals.

Q: What does it cover?

A: It covers material requirements, design for strength and serviceability, load combinations and factors, deflection limits, development and splicing of GFRP reinforcement, construction documentation, inspection and testing, and methods for evaluating existing structures that include GFRP reinforcement. The Code restricts the types of FRP covered (solid, round GFRP bars per ASTM D7957) and includes commentary that explains the technical basis for provisions.

Q: Who typically uses it?

A: Structural engineers, design offices, material manufacturers and suppliers, precast and cast‑in‑place concrete contractors, building officials, and researchers implementing or reviewing designs using GFRP reinforcement — especially where corrosion resistance or non‑conductivity is required.

Q: Is it current or superseded?

A: The CODE‑440.11‑22 edition is the first ACI code for GFRP bars (first published in inch‑pound units in 2022 with the SI edition in 2023) and is the current ACI code document for GFRP bars; users should verify whether later errata or revisions have been published before final design. The Code is written as a dependent code to the then‑current ACI 318 edition cited in the Code text.

Q: Is it part of a series?

A: Yes — it is a member of ACI Committee 440’s body of FRP guidance and is intended to be used with ACI 318 (Building Code Requirements for Structural Concrete) and related ACI manuals (for example ACI MNL‑7, a companion design handbook) and ASTM material specifications (e.g., ASTM D7957).

Q: What are the key keywords?

A: GFRP, fiber‑reinforced polymer, nonmetallic reinforcement, ASTM D7957, development length, splicing, serviceability, durability, ACI 318, SI units.