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  • ASTM
    A779/A779M-12 Standard Specification for Steel Strand, Seven-Wire, Uncoated, Compacted for Prestressed Concrete
    Edition: 2012
    $82.37
    Unlimited Users per year

Description of ASTM-A779 2012

ASTM A779 / A779M - 12

Standard Specification for Steel Strand, Seven-Wire, Uncoated, Compacted for Prestressed Concrete

Active Standard ASTM A779 / A779M | Developed by Subcommittee: A01.05

Book of Standards Volume: 01.04




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 covers two types and three grades of compacted, seven-wire, uncoated strand for use in prestressed concrete construction. The two types of strand are low-relaxation and stress-relieved (normal-relaxation). The three grades are 245 [1700], 260 [1800] and 270 [1860].

1.2 This specification is applicable for orders in either inch-pound units (as Specification A779) or in SI units (as Specification A779M).

1.3 The values stated in either inch-pound or SI units are to be regarded 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.


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

A994 Guide for Editorial Procedures and Form of Product Specifications for Steel, Stainless Steel, and Related Alloys

A1061/A1061M Test Methods for Testing Multi-Wire Steel Strand

U.S. Federal Standard

Fed.Std.No.123 Marking for Shipments (Civil Agencies)

U.S. Military Standard

MIL-STD-129 Marking for Shipment and Storage

Keywords

compacted strand (tendon); prestressed concrete; steel wire;


ICS Code

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


DOI: 10.1520/A0779_A0779M-12

ASTM International is a member of CrossRef.

ASTM A779 / A779M

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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