ACI releases ACI PRC-357.3-25: Design and Construction of Waterfront and Coastal Concrete Marine Structures—Guide

9/16/2025

The American Concrete Institute (ACI) today announced that ACI Committee 357, Offshore and Marine Concrete Structures, has released ACI PRC-357.3-25: Design and Construction of Waterfront and Coastal Concrete Marine Structures—Guide. Historical versions, such as ACI PRC-357.3-14, are also available for purchase.

The ACI PRC-357.3-25 sections on materials and durability considerations for waterfront concrete marine structures were updated with recent knowledge. In addition, information related to sustainability, design and analysis, and quality control and inspection was reorganized.

All ACI Guides are written in non-mandatory language and present committee recommendations for analysis, design, specifying, selection, evaluation, testing, construction, or repair of concrete materials or structures.

Waterfront and coastal concrete marine structures are exposed to severe environmental conditions for which concrete is ideally suited. These conditions include wind; waves, including seiches and tsunamis; ice and ship impact; abrasion and impact from floating debris; passing vessel effects; and seismic events. As many of these structures are pile-supported, the seismic loading can be critical and, therefore, a discussion of piles and their installation is included in this guide. Also provided are the measures that can be taken to minimize the undesirable effects of these environmental factors and reduce the potential for serious problems.

This guide also defines waterfront and coastal concrete marine structures, discusses materials that can be used to construct them, describes potential durability issues and how to mitigate them, and presents sustainability and serviceability requirements. Design loads, analysis techniques, design methodology, and construction considerations are also presented. Other topics include quality control (QC), above-water and below-water inspection of these structures, and repair of damaged structures. The materials, processes, QC measures, and inspections described in this guide should be tested, monitored, or performed as applicable only by qualified individuals holding the appropriate ACI certifications or equivalent.

ACI Committee 357’s next meeting will occur during the Fall 2025 ACI Concrete Convention on October 28, from 8:00 am EDT to 11:00 am EDT. More information about the Committee can be found here.

About the American Concrete Institute:

The American Concrete Institute (ACI), a 501(c)(3) nonprofit organization, is the leading global authority for the development, dissemination, and adoption of its consensus-based standards, technical resources, and educational, training, and certification programs. Founded in 1904, ACI is headquartered in Farmington Hills, Michigan, USA, with a regional office in Dubai, UAE, and Resource Centers located in Southern California, the Midwest (Chicago, IL area), and the Mid-Atlantic (Baltimore, MD area). ACI has more than 90 chapters, more than 350 student chapters, and approximately 40,000 members spanning more than 120 countries. The American Concrete Institute – Always advancing®. Visit concrete.org for additional information.