Please Note: ASTM C1776 was published after the release of NPCA’s 2017 Selected ASTM Standards for Precast and Prestressed Concrete. As such, the new standard specification will be included in NPCA’s 2018 Selected ASTM Standards for Precast and Prestressed Concrete. If you need access to the standard before 2018, you may purchase it on the ASTM website.
In March, ASTM published a new standard specification for wet-cast precast concrete modular retaining wall units. ASTM C1776, “Standard Specification for Wet-Cast Precast Modular Retaining Wall Units,” covers wet-cast precast modular retaining wall units cast from first-purpose concrete with or without the inclusion of steel reinforcement. The precast units covered by this specification are machine-placed units intended for use in the construction of dry-stacked, modular retaining wall systems. ASTM C1776 covers the following subjects:
- Ordering Information
- Materials and Manufacture
- Physical Properties
- Dimensions, Mass and Permissible Variations
- Workmanship, Finish and Appearance
- Frequency of Tests
- Specimen Preparation
- Test Methods
- Rejection and Rehearing
- Product Marking
Subcommittee C27.20 on Architectural and Structural Products developed the standard specification.
Before the standard specification was published earlier this year, there were no industry standards that addressed precast modular retaining wall units. The new standard specification aids in ensuring that all systems – proprietary or non-proprietary – conform to the same industry standard for the manufacture and testing of wet-cast precast modular retaining wall units.
For additional information on wet-cast precast modular retaining wall units, visit our retaining walls page.
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