ASTM A886/A886M-24
(Specification)Standard Specification for Low-Relaxation, Indented, Seven-Wire Steel Strand for Prestressed Concrete
Standard Specification for Low-Relaxation, Indented, Seven-Wire Steel Strand for Prestressed Concrete
ABSTRACT
This specification covers seven-wire uncoated, indented, stress-relieved carbon steel strands for use in pre-stressed concrete construction. Wire dimensions, indentations, and mechanical properties shall be in accordance to the values specified in this specification. The carbon steel strand is produced to satisfy only the specified mechanical properties, this specification contains no information on the chemical composition of the wires.
SCOPE
1.1 This specification covers low-relaxation, indented, Grade 270I [1860I] seven-wire steel strand for use in prestressed concrete construction. Grade 270I [1860I] has a minimum tensile strength of 270 ksi [1860 MPa] based on the nominal area of the strand.
1.2 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 the specification.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A886) or in SI units (as Specification A886M).
1.4 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.
1.5 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.
General Information
Relations
Buy Standard
Standards Content (Sample)
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.
Designation: A886/A886M − 24
Standard Specification for
Low-Relaxation, Indented, Seven-Wire Steel Strand for
1
Prestressed Concrete
This standard is issued under the fixed designation A886/A886M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.2 U.S. Military Standard:
3
MIL-STD-129 Marking for Shipment and Storage
1.1 This specification covers low-relaxation, indented,
2.3 U.S. Federal Standard:
Grade 270I [1860I] seven-wire steel strand for use in pre-
3
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
stressed concrete construction. Grade 270I [1860I] has a
minimum tensile strength of 270 ksi [1860 MPa] based on the
3. Terminology
nominal area of the strand.
3.1 Definition of Terms Specific to this Specification:
1.2 The text of this specification references notes and
3.1.1 lay length, n—the axial distance required to make one
footnotes that provide explanatory material. These notes and
complete revolution of any outer wire of a strand.
footnotes (excluding those in tables) shall not be considered as
3.1.2 strand, n—a group of wires having a center wire
requirements of the specification.
enclosed tightly by six helically placed outer wires.
1.3 This specification is applicable for orders in either
3.1.2.1 Discussion—The direction of lay is either right-
inch-pound units (as Specification A886) or in SI units (as
handed or left-handed.
Specification A886M).
3.1.3 strand splice, n—a production connection between
1.4 The values stated in either inch-pound units or SI units
two separate lengths of strand never intended to carry pre-
are to be regarded separately as standard. Within the text, the
stressing loads.
SI units are shown in brackets. The values stated in each
3.1.4 wire weld, n—a resistance butt-weld joining two
system may not be exact equivalents; therefore, each system
separate lengths of wire after wire drawing and before the wire
shall be used independently of the other. Combining values
is formed into strand.
from the two systems may result in non-conformance with the
specification.
4. Ordering Information
1.5 This international standard was developed in accor-
4.1 Orders for low-relaxation, indented, Grade 270 seven-
dance with internationally recognized principles on standard-
wire steel strand under this specification shall contain the
ization established in the Decision on Principles for the
following information:
Development of International Standards, Guides and Recom-
4.1.1 Quantity (feet [metres]),
mendations issued by the World Trade Organization Technical
4.1.2 Nominal diameter of strand (inches [millimetres]), and
Barriers to Trade (TBT) Committee.
4.1.3 ASTM designation A886 [A886M] and year of issue.
2. Referenced Documents 4.2 The purchaser shall have the option to specify additional
2
requirements, including but not limited to, the following:
2.1 ASTM Standard:
4.2.1 Relaxation evidence from similarly dimensioned
A1061/A1061M Test Methods for Testing Multi-Wire Steel
strand (6.5.1),
Prestressing Strand
4.2.2 Other types of indented wire (7.5.2),
4.2.3 Whether strand splices are permitted (8.1.1),
4.2.4 Weldless strand (8.2.2),
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee 4.2.5 Requirements for outside inspection (11.1),
A01.05 on Steel Reinforcement.
4.2.6 Load-elongation curve (13.2),
Current edition approved March 1, 2024. Published March 2024. Originally
4.2.7 Packaging and package marking (Section 14), and
approved in 1988. Last previous edition approved in 2017 as A886/A886M – 17.
DOI: 10.1520/A0886_A0886M-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from U.S. Government Printing Office, Superintendent of
Standards volume information, refer to the standard’s Document Summary page on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
the ASTM website. www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A886/A886M − 24
TABLE 1 Nominal Dimensions of Indentations
Wire Diameter, d Nominal Diameter Depth, a Length, L Pitch, P
of Strand
Fig.
in. [mm] i
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A886/A886M − 17 A886/A886M − 24
Standard Specification for
Steel Strand, Low-Relaxation, Indented, Seven-Wire Stress-
1
Relieved Steel Strand for Prestressed Concrete
This standard is issued under the fixed designation A886/A886M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers two types and two grades of indented seven-wire uncoated, low-relaxation, indented, Grade 270I
[1860I] seven-wire steel strand for use in prestressed concrete construction. The two types of strand are low-relaxation and
stress-relieved (normal-relaxation). Grade 250I [1725I] and Grade 270I [1860I] have minimum tensile strengths of 250 ksi [1725
MPa] and Grade 270I [1860I] has a minimum tensile strength of 270 ksi [1860 MPa], respectively, MPa] based on the nominal
area of the strand.
1.2 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 the specification.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A886) or in SI units (as Specification
A886M).
1.4 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 aremay 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.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standard:
A1061/A1061M Test Methods for Testing Multi-Wire Steel Prestressing Strand
2.2 U.S. Military Standard:
3
MIL-STD-129 Marking for Shipment and Storage
2.3 U.S. Federal Standard:
3
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Nov. 1, 2017March 1, 2024. Published November 2017March 2024. Originally approved in 1988. Last previous edition approved in 20162017
as A886/A886M – 16.A886/A886M – 17. DOI: 10.1520/A0886_A0886M-17.10.1520/A0886_A0886M-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A886/A886M − 24
3. Terminology
3.1 Definition of TermTerms Specific to this Specification:
3.1.1 lay length, n—the axial distance required to make one complete revolution of any outer wire of a strand.
3.1.2 strand, n—a group of wires having a center wire enclosed tightly by six helically placed outer wires with uniform pitch of
not less than 12 and not more than 16 times the nominal diameter of the strand.wires.
3.1.2.1 Discussion—
The direction of lay is either right-handed or left-handed.
3.1.3 strand splice, n—a production connection between two separate lengths of strand never intended to carry prestressing loads.
3.1.4 wire weld, n—a resistance butt-weld joining two separate lengths of wire after wire drawing and before the wire is formed
into strand.
4. Ordering Information
4.1 Orders for indented low-relaxation, indented, Grade 270 seven-wire steel strand under this specification shall contain the
following information:
4.1.1 Quantity (feet [metres]),
4.1.2 Nominal diameter of strand (inches [millimetres]), and
4.1.3 Grade of strand,
4.1.4 Typ
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.