ASTM WK62898

    New Specification for Low-Relaxation, Hot Dip Galvanized Seven-Wire Steel Strand for Post Tensioning or Reinforcing Concrete Structures

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    Developed by Subcommittee: A01.05 | Committee A01 | Contact Staff Manager



    WK62898

    1. Scope

    1.1 This specification covers hot dip galvanized, low-relaxation, seven-wire steel strand for use in applications such as post-tensioning concrete structures (for example, PT tendons, bridge stay cables), reinforcing concrete structures (for example, parking structures, concrete tanks), and other similar applications. Grade 270 [1860] has nominal tensile strength of 270 ksi [1860 MPa] based on the nominal steel area of the strand. 1.2 This specification is applicable for orders in either inch-pound units (as Specification AXXX) or in SI units (as Specification AXXXM). 1.3 Units--The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. 1.4 This standard does not purport to address all of the safety concerns, is 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.


    Keywords

    seven-wire galvanized strand (tendon); galvanized steel wire; galvanized PC strand; galvanized post-tension tendon; galvanized cable stay; PC strand; zinc-aluminum galvanized PC strand: : :

    Rationale

    Currently, there is not an ASTM standard for galvanized PC strand for post tension or cable stay applications as there is in the EU. ASTM A416 only covers uncoated strand for these applications. The objective of this standard is to establish a standalone specification for this product, which is similar in strength and design requirements as ASTM A416 uncoated 270K PC strand.

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

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    Work Item Status

    Date Initiated:
    03-30-2018

    Technical Contact:
    Dale King

    Status:
    Draft Under Development