ASTM D3689/D3689M-22 PDF Download

The ASTM D3689/D3689M-22 standard provides guidelines for measuring the axial deflection of deep foundation elements when subjected to static axial tension. These methods are applicable to various types of deep foundations, including drilled shafts, cast-in-place piles, driven piles, and other element types.

The standard emphasizes that the test results may not fully represent the long-term performance of the entire deep foundation system. It also highlights that project plans, specifications, and provisions may introduce additional requirements and procedures specific to a particular test program, subject to approval by the foundation engineer.

The standard allows for optional apparatus and procedures, with their use requiring approval from the foundation engineer. It differentiates between mandatory provisions (indicated by "shall") and recommended/advisory provisions (indicated by "should"). The test results obtained from the procedures outlined in the standard should be interpreted by the foundation engineer to assess the actual performance and adequacy of the constructed foundation elements.

The standard specifies that an engineer qualified to perform such work should design and approve all loading apparatus, loaded members, and support frames. It also clarifies that the notes, footnotes, illustrations, and appendices included in the standard provide explanatory or advisory material, rather than essential requirements. Additionally, the standard defines the use of inch-pound units and provides guidelines for significant digits and rounding of observed and calculated values.

It is important to note that the standard does not determine the accuracy to which the test data can be applied in design or other uses, or provide specific recommendations for action. Instead, it serves as an organized collection of information that should be used in conjunction with professional judgment and consideration of the unique aspects of a project. The document's title, "Standard," indicates that it has undergone the ASTM consensus process for approval.