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ASTM A779 / A779M - 10


ASTM A779 / A779M - 10 Standard Specification for Steel Strand, Seven-Wire, Uncoated, Compacted, Stress-Relieved for Prestressed Concrete


Active Standard ASTM A779 / A779M Developed by Subcommittee: A01.05 |Book of Standards Volume: 01.04

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ASTM A779 / A779M

Abstract

This specification covers seven-wire, uncoated, compacted, stress-relieved steel strand for prestressed concrete. The chemical requirements, mechanical requirements, and dimensions and permissible variations are presented. The mechanical requirement includes breaking strength, load at 1% extension and elongation. Different test method shall be performed on the strand that includes dimension test, breaking strength test, load at 1% extension test, elongation test and workmanship.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification describes three grades of compacted, seven-wire, uncoated, stress-relieved strand for use in pre-tensioned and post-tensioned prestressed concrete construction.

1.2 Supplement I describes low-relaxation strand and low-relaxation testing.

1.3 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other, without combining values in any way.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A1061/A1061M Test Methods for Testing Multi-Wire Steel Strand


Keywords

compacted strand (tendon); prestressed concrete; Concrete reinforcement--specifications; Prestressed concrete; Steel wire (concrete reinforcement applications)--specifications; Steel wire (prestressed concrete); Steel wire strand--specifications;



ICS Code

ICS Number Code 29.060.01 (Electrical wires and cables in general)



DOI: 10.1520/A0779_A0779M-10

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