Work Item
ASTM WK62898
New Specification for Standard Specification for Low-Relaxation, Hot Dip Galvanized, Seven-Wire Steel Strand for Post Tensioning or Reinforcing Concrete Structures
1. Scope
1.1 This specification covers hot-dip galvanized, low-relaxation, seven-wire steel strand for use in post-tensioned reinforced concrete construction. Grade 270 [1860] has a nominal tensile strength of 1860 MPa [270 ksi] 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 SI units (as Specification AXXXM). 1.3 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard. 1.4 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables, shall not be considered as requirements of this specification. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of international Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Keywords
galvanized strand; Grade 270 [1860] strand; hot-dip galvanizing; metallic-coated steel wire; seven-wire metallic-coated strand; zinc-aluminum alloy galvanized steel wire; zinc-aluminum alloy galvanized steel strand :
Rationale
Currently, there is not an ASTM standard for galvanized PC strand 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 that 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.
Work Item Status
Date Initiated: 03-30-2018
Technical Contact: Dale King
Item: 001
Ballot: A01.05 (19-02)
Status: Will Reballot Item
Item: 001
Ballot: A01.05 (20-01)
Status: Will Reballot Item