ASTM WK59340

    New Specification for TRANSITION MAT for scour prevention at pipe or culvert outlets

    (What is a Work Item?)

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


    1. Scope

    1.1 This specification covers requirements and test methods for Transition Mat . Table 1 is a material purchasing specification based on flow rate and shear stress requirements. 1.2 This specification is applicable to the use of a transition mat in a channel or outfall to prevent scouring below and downstream of a pipe or culvert outlet. The Transition mat should mechanically protect soil from scour and erosion until the shear forces have dissipated enough for other erosion control methods can prevent soil erosion. NOTE 1It should be noted that proper installation and maintenance are critical for the effective functioning of a transition mat. 1.3 The practices presented herein are intended to ensure that the Transition mat is a permanent BMP for a variety of performance objectives. 1.4 The values stated in SI units are to be regarded as the standard. The values in inch-pound units are provided for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    Transition mat:Scour Stop


    A standard to deal with the high turbulence area of scour that develops at Culvert and Pipe outfalls

    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:
    Keith Harris

    Draft Under Development