ASTM WK57642

    New Guide for Determining the Factors of Safety for an Articulating Concrete Block (ACB) System in Open Channel Flow

    (What is a Work Item?)

    Developed by Subcommittee: D18.25 | Committee D18 | Contact Staff Manager


    1. Scope

    Outline a recently developed methodology for determining four distinct Factors of Safety against overturning of blocks subjected to open-channel flow in channels/spillways having a nominally trapezoidal cross-sectional shape. Illustrate the specific geometric characteristics of a sample block that are needed to facilitate use of the method for any arbitrary system. Provide guidance on determining what factor of safety is appropriate for a given proposed installation.


    Articulating Concrete Block; ACB; CSU Method; Cox Method


    Reflects improved method (i.e., more accurate method) for determining factors of safety. Anticipated use is for any proposed specification of ACB's in order to determine an appropriate block size for given design conditions. Potential users would be practicing consulting/professional engineers (to properly select a product), government regulatory agencies (to permit independent verification of the validity of a selected system), and manufacturers of ACB's (to guide product development/improvement to meet anticipated needs).

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    James Nadeau

    Draft Under Development